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Genlisea

Genlisea is a genus of carnivorous plants in the family Lentibulariaceae, consisting of approximately 30 species of small, rootless, annual or perennial herbs adapted to nutrient-poor, wet environments in tropical regions of South America, Africa, and Madagascar.^[1] These plants, commonly known as corkscrew plants, feature two distinct leaf types: photosynthetic, rosetted green leaves above ground and specialized subterranean rhizophylls—achlorophyllous, Y-shaped structures with twisted arms lined by retorse (backward-pointing) trichomes that trap microorganisms such as protozoa, algae, nematodes, and small invertebrates.^[1]^[2] Unlike related bladderworts (Utricularia), Genlisea employs a passive yet dynamic carnivorous mechanism, harnessing the active swimming of bacteria and microfauna to rectify particle motion toward digestive vesicles without relying on suction, fluid flow, or chemical lures.^[2]^[3] The genus is divided into two subgenera: subgenus Genlisea (22 species), distributed across South America, tropical Africa, and one species in Madagascar, and subgenus Tayloria (8 species), endemic to the highlands of northeastern Brazil.^[1] Morphologically, species range from semi-aquatic to terrestrial rosettes, typically 1–5 cm tall, with rhizophylls extending up to 3 cm underground into sandy or peaty soils.^[1]^[3] Their inflorescences produce small, zygomorphic flowers in shades of yellow, violet, or white, adapted for pollination by small insects.^[1] Genlisea species thrive in open, exposed habitats like savannas, bogs, and rocky outcrops, where their carnivory supplements nitrogen and phosphorus acquisition in oligotrophic conditions.^[1] Notably, G. tuberosa possesses the smallest known genome among angiosperms at approximately 61 Mbp (1C-value), with several other species, such as G. aurea and G. margaretae, having genomes ranging from 63 to 64 Mbp, enabling rapid evolution and potentially contributing to their specialized ecology.^[4] The digestive process in rhizophyll vesicles involves enzyme secretion from multicellular glands, breaking down prey into absorbable nutrients, with recent studies highlighting how bacterial motility creates a natural "ratchet" effect to concentrate victims.^[2]^[3] Despite their intriguing biology, many Genlisea species face threats from habitat loss, underscoring the need for conservation in their biodiversity hotspots.^[1]

Morphology and Anatomy

General Description

Genlisea is a genus of approximately 30 species of carnivorous flowering plants in the family Lentibulariaceae, native to tropical and subtropical regions of the Americas, Africa, and Madagascar.^[1] These small herbaceous plants are typically annual or perennial, forming compact rosettes in nutrient-poor, moist habitats such as wetlands, sandy soils, or rocky outcrops, where they exhibit terrestrial, lithophytic, or semi-aquatic growth habits.^[5] Lacking true roots, Genlisea species rely on modified leaves for anchorage and nutrient acquisition, with overall plant heights ranging from 2 to 30 cm, including inflorescence scapes.^[5] The vegetative structure of Genlisea consists of a basal rosette of aboveground photosynthetic leaves, which are typically spatulate or lanceolate and 1–4 cm long, emerging from a short rhizome or stolon system.^[1] Belowground, the plants produce achlorophyllous, Y-shaped rhizophylls that function as traps, extending 1–5 cm in length; each trap features a central stalk leading to a digestive vesicle and two helically twisted arms lined with inward-pointing glandular hairs and mucilage for prey capture and retention.^[3]^[6] These traps, which serve both exploratory and absorptive roles akin to roots, contain vascular bundles supporting digestive glands that secrete enzymes and facilitate nutrient uptake from captured protozoa, nematodes, and other small soil organisms.^[3] Flowers are borne on slender, erect scapes arising from the rosette, forming bracteate racemes with 1–10 zygomorphic, bilabiate corollas that measure 4–10 mm long.^[7] The corollas, which exhibit a spurred lower lip and a palate for pollinator guidance, occur in shades of yellow, white, or violet and are primarily pollinated by small insects such as flies and bees.^[8] This floral morphology aligns with the family's general pattern, emphasizing precision in nectar access to promote cross-pollination in humid environments.^[7]

Carnivorous Mechanism

Genlisea species employ a unique carnivorous strategy through specialized underground leaves called rhizophylls, which function as eel-pot traps. These achlorophyllous structures are hollow and tubular, typically forming an inverted Y-shape with a basal stalk connecting to a bulbous vesicle that serves as the digestion chamber, followed by two helically twisted arms that coil into corkscrew configurations. The inner surfaces of the arms and neck are lined with retrorse (inward-pointing) detentive hairs, which are multicellular and ensure unidirectional prey movement toward the vesicle, while quadrifid digestive glands—composed of a basal cell, stalk cell, and a head of four to eight secretory cells—line the trap interior, particularly concentrated along vascular bundles in the subgenus Genlisea.^[3]^[9] Prey capture in Genlisea is primarily passive, relying on the trap's morphology to mimic soil interspaces and attract microscopic organisms through accidental entry rather than active suction or chemical lures, though recent studies indicate that detentive hairs rectify the active swimming of bacteria and protozoa toward the vesicle via funnel-like geometry. Small soil-dwelling microfauna, such as protozoa (e.g., Paramecium and Euglena species), nematodes, rotifers, tardigrades, and small crustaceans, enter the trap openings or slits along the arms, where the backward-pointing hairs prevent retrograde escape, guiding them into the vesicle via water films or minor currents potentially generated by glandular secretions. Once inside, prey are retained and killed primarily by anoxia in the low-oxygen vesicle environment, with mucilage from the glands further immobilizing them.^[2]^[10]^[9] Digestion occurs extracellularly in the vesicle, where quadrifid glands continuously secrete a suite of lysosomal enzymes, including proteases, via rough endoplasmic reticulum and exocytosis through cuticular pores, forming a viscous fluid that breaks down prey tissues and facilitates rapid nutrient absorption, particularly nitrogen, to supplement uptake in nutrient-poor soils. Traps can contain high densities of these structures, with species like Genlisea aurea producing numerous rhizophylls per plant—often exceeding several hundred—to maximize capture efficiency, though exact annual prey intake per trap varies by habitat and remains estimated in the range of tens of thousands of items based on observed accumulation and turnover rates. The glands exhibit structural specialization, with dense ridges in subgenus Genlisea enhancing enzymatic activity compared to the scattered distribution in subgenus Tayloria.^[3]^[9]^[10] Evolutionarily, the traps of Genlisea represent an adaptation of foliar structures rather than roots, correlating with the complete loss of true root systems in the genus, likely arising as an early innovation within Lentibulariaceae to exploit microscopic soil fauna in oligotrophic environments like inselbergs and wetlands. This leaf-derived morphology, with its helical arms and specialized glands, underscores a basal trait in the family, enabling efficient nutrient scavenging without the energy costs of active trapping mechanisms seen in relatives like Utricularia.^[9]^[3]

Reproductive Structures

Genlisea species produce inflorescences as single or rarely double racemes emerging from the basal rosette on erect scapes that range from 25 to 600 mm in length and may be glabrous or covered in glandular or eglandular hairs.^[9] These scapes bear 1 to 30 flowers in a dense or lax arrangement, often one-sided, with the flowers being zygomorphic, sympetalous, and bilabiate, featuring a tubular corolla 5 to 20 mm long and a pronounced spur 2 to 11 mm in length.^[9] Flower colors vary from pale lavender and lilac-bluish to violet, rarely white, or yellow in South American species, and the breeding system is self-compatible, though outcrossing predominates via entomophilous pollination by insects such as bees (e.g., Halictidae and Apidae) and syrphid flies.^[11]^[9] Following pollination, fruits develop as dry, globose to ovoid capsules 2 to 4 mm in diameter, which are glandular and hairy; these dehisce via circumscissile, spiral, poricidal, or longitudinal modes depending on the subgenus, often explosively to release seeds.^[9] Seeds are minute, measuring 0.25 to 0.6 mm in length, ellipsoid to prismatic in shape, with species-specific reticulate or papillose testa ornamentation featuring raised anticlinal cell walls; dispersal occurs primarily through catapult action via rigid, hook-shaped funiculi attached to the seeds.^[9]^[12] Germination requires moist, nutrient-poor substrates, aligning with the genus's carnivorous adaptations.^[12] Asexual reproduction is rare in Genlisea and occurs via plantlets formed on trap leaves in select species such as G. flexuosa, rather than widespread gemmae production.^[9] Flowering seasons vary by species and region, typically aligning with wet periods in tropical habitats (e.g., November to January or May to July in campo rupestre ecosystems).^[9] Chromosome numbers in the genus typically range from 2n = 16 to 38, reflecting polyploidy and variation across species.^[13] Hybridization is limited in natural populations but has been observed both naturally (e.g., G. margaretae × G. glandulosissima) and more frequently in cultivation through artificial crosses within subgenera.^[9]

Taxonomy and Phylogeny

Classification History

The genus Genlisea was established in 1833 by the French botanist Augustin de Saint-Hilaire based on specimens collected during his travels in Brazil, with the name honoring the French writer and educator Stéphanie Félicité, comtesse de Genlis (1746–1830).^[14] The type species is G. aurea St.-Hil., described from material gathered in the diamond district of Minas Gerais. From its inception, Genlisea was recognized for its close affinity to Utricularia due to shared carnivorous habits and rootless growth, though distinguished by its spiral, tubular traps formed from modified leaves. In the late 19th century, George Bentham formally placed Genlisea within the family Lentibulariaceae in his seminal Genera Plantarum, solidifying its position alongside Utricularia and Pinguicula based on morphological similarities in inflorescences and glandular structures. Early classifications occasionally noted superficial floral resemblances to Pinguicula, with violet corollas and spurred structures leading to brief misattributions in some regional floras, though trap morphology quickly clarified its distinct identity. Significant progress in Genlisea taxonomy occurred in the mid-20th century through the work of Brazilian botanist Eliane Fromm-Trinta, who described numerous South American species between 1971 and the 1980s, including G. metallica (1978) and G. uncinata (co-authored with Peter Taylor in 1980), expanding the known diversity from fewer than 10 to over 20 species. Major revisions include Fischer et al. (2000) for African and Madagascan species and Fleischmann (2011) for subgenus Tayloria. Modern classification has been refined by molecular phylogenetic studies, which confirm two subgenera: subgenus Genlisea (22 species, with poricidal or circumsessile capsule dehiscence), distributed across South America, tropical Africa, and one species in Madagascar, and subgenus Tayloria (9 species, with septicidal capsules), endemic to the highlands of northeastern Brazil. As of 2025, 31 species are recognized, reflecting ongoing discoveries in tropical wetlands and refinements in nomenclature. A new species, G. hawkingii, was described in 2020 from southwestern Brazil, adding to subgenus Tayloria.^[6]

Species Diversity

The genus Genlisea comprises 31 accepted species of carnivorous plants in the family Lentibulariaceae.^[15] These species are distributed across tropical regions of South and Central America (approximately 23 species) and tropical Africa including Madagascar (8 species), with no occurrences in Asia or Australia.^[7] The highest diversity is concentrated in Brazil, where over half of the species are found, particularly in the campos rupestres of the central and eastern highlands.^[1] Species are grouped into two subgenera based on capsule dehiscence and geographic patterns: subgenus Tayloria with 9 species endemic to the highlands of northeastern Brazil, and subgenus Genlisea encompassing the remaining 22 species across South America, Africa, and Madagascar.^[1] Within subgenus Genlisea, South American species often feature yellow flowers (e.g., G. aurea), while violet to mauve corollas predominate in African species (e.g., G. africana) and some South American ones (e.g., G. violacea); yellow-flowered taxa are restricted to the New World. Endemism is pronounced, with many species confined to specific microhabitats such as the tepuis of the Guayana Highlands or isolated Brazilian plateaus, reflecting limited dispersal and adaptation to nutrient-poor soils.^[7] Morphological variation among Genlisea species includes differences in plant size, with G. tuberosa notable as the largest, producing flowering scapes up to 1 m tall and forming underground tubers as a perennial geophyte. Trap structures, known as rhizophylls, exhibit helical coiling and vary in length and diameter across species, from diminutive forms under 1 cm in annuals like G. pygmaea to longer traps in larger taxa.^[7] Recent taxonomic additions highlight ongoing discoveries, such as G. tuberosa described in 2013 from Brazilian campos rupestres and G. multiflora in 2017 from Amazonian white-sand savannas, underscoring the genus's hidden diversity in remote areas.^[16]

Phylogenetic Relationships

Genlisea is positioned within the family Lentibulariaceae as the sister genus to Utricularia, with the combined Genlisea-Utricularia clade being sister to Pinguicula; the family Lentibulariaceae itself diverged from other Lamiales lineages approximately 40–50 million years ago.^[17]^[18] The initial molecular phylogeny incorporating Genlisea was provided by analyses of the plastid rbcL gene, which supported the monophyly of Lentibulariaceae and highlighted independent origins of carnivory across angiosperms.^[19] Subsequent phylogenetic studies using chloroplast markers such as trnK/matK and trnL-F sequences have confirmed the monophyly of Genlisea and its sister relationship to Utricularia.^[20] Within the genus, African species form basal clades, while South American species represent more derived lineages, suggesting a Neotropical origin for the most recent common ancestor followed by dispersal to Africa.^[20] Nuclear ribosomal ITS sequences have also been employed in broader Lentibulariaceae phylogenies, reinforcing these relationships and indicating elevated substitution rates in Genlisea and Utricularia relative to Pinguicula.^[21] The divergence between Genlisea and Utricularia is estimated at approximately 30–39 million years ago, marking the stem age of the genus.^[18] Recent phylogenomic analyses of complete plastid genomes and mitochondrial genes further support the monophyly of Genlisea subgenera and reveal high nucleotide diversity in key loci like matK, consistent with rapid diversification within the genus.^[22] Whole-genome comparisons across Genlisea species highlight bidirectional genome size evolution and chromosomal rearrangements, underscoring the dynamic evolutionary history post-divergence.^[23]

Evolutionary Biology

Botanical History

The genus Genlisea was first discovered during the early 19th-century botanical expeditions to Brazil led by the French naturalist Auguste de Saint-Hilaire, who collected specimens between 1816 and 1822. In 1833, Saint-Hilaire formally established the genus in his publication Voyage dans le district des diamans et à l'intérieur du Brésil, describing four initial species: G. aurea, G. filiformis, G. pygmaea, and G. violacea, with G. aurea recognized as the type species and the first known member of the genus. These early collections highlighted the plants' unusual subterranean traps, though their carnivorous nature was not immediately confirmed. Subsequent explorations in the mid-19th century expanded knowledge of Genlisea in South America, particularly through collections by British botanist Hugh Algernon Weddell during his travels in Brazil in the 1840s. Weddell gathered specimens of G. aurea and related species around 1844, contributing to further descriptions such as G. biloba and G. repens by J. Benjamin in 1847, which formalized additional Brazilian taxa based on these and prior materials. Type specimens from these periods were primarily deposited in European herbaria, such as those in Paris and London, facilitating taxonomic studies but delaying comprehensive surveys due to the remote, wetland habitats' inaccessibility. Charles Darwin briefly referenced Genlisea in his 1875 monograph Insectivorous Plants, speculating on the potential carnivorous function of its tubular traps based on their structure, though he noted the absence of observed prey capture at the time.^[24] This mention underscored early interest in the genus amid broader studies of carnivory, but progress stalled until the 20th century owing to logistical challenges in accessing tropical montane and savanna ecosystems. Exploration intensified in the mid-20th century with surveys of Venezuela's tepuis (table mountains) by American botanist Bassett Maguire and collaborators during the 1940s and 1950s as part of the New York Botanical Garden's Guayana Highland expeditions. These efforts yielded new Genlisea collections, including G. nigrocaulis from the Tafelberg region in 1944, revealing tepui-endemic diversity in high-altitude, nutrient-poor seepage areas.^[25] In Africa, additional species were documented in the 1960s, such as through Peter Taylor's descriptions, expanding the known range to include taxa like G. subglabra (elevated from varietal status) on inselbergs and wetlands. Key advancements came in the late 20th century with the monographic work of Brazilian botanist Elza Fromm-Trinta, whose revisions in the 1970s and 1980s—such as her 1979 treatment in Rodriguésia and collaborations with Taylor—described over 20 new species, primarily from Brazil's cerrado and Amazon regions, nearly doubling the genus's recognized diversity.^[26] Post-1950 descriptions totaled approximately 25 new species, driven by these targeted field studies despite persistent barriers like rugged terrain and seasonal flooding.^[27]

Genome Characteristics

Genlisea species possess some of the smallest nuclear genomes known among angiosperms, with 1C-values ranging from 63 to 170 Mb across the genus. For instance, Genlisea aurea has a genome size of approximately 63 Mb, which is over 50 times smaller than the human genome at around 3,000 Mb. The absolute smallest recorded angiosperm genome occurs in G. tuberosa at 61 Mb, highlighting the genus's extreme miniaturization.^[28]^[13]^[29] These genomes are characterized by low repetitive DNA content, typically around 13% in G. aurea, including reduced transposon activity and other mobile elements, which contrasts with the higher repetitive fractions in most plants. This results in exceptionally high gene density, with an estimated 20,000 to 25,000 protein-coding genes—comparable to many larger plant genomes—despite the compact size. Introns are notably short, averaging 134 nucleotides in G. aurea, representing a 2.4-fold reduction compared to relatives like Mimulus guttatus, though complete intron loss is not observed.^[28]^[28]^[28] The first draft genome assembly of a Genlisea species was achieved for G. aurea in 2013, yielding an assembly of 43.4 Mb from 10,687 contigs, with an overall GC content of 40%. Comparative analyses reveal a massive reduction from an ancestral genome size of approximately 400–800 Mb in the genus's common ancestor, driven by extensive deletions in non-coding regions and gene loss.^[28]^[23] Evolutionary drivers of this reduction include relaxed purifying selection in nutrient-poor wetland habitats, where carnivory may alleviate genomic constraints by supplementing mineral deficiencies. Genome size inversely correlates with trap complexity in derived lineages, suggesting that miniaturization facilitates rapid evolutionary changes in foraging structures. These traits contribute to resolving the C-value paradox, as Genlisea's small genomes maintain functional complexity without proportional size increase, challenging assumptions about genome size and organismal complexity. Polyploidy is rare in the genus, with most species diploid (2n = 16) and only occasional higher ploidy levels observed in specific lineages.^[30]^[13]^[13]

Microbiome Interactions

The traps of Genlisea species host diverse microbial communities, including bacteria, fungi, and protists, that contribute to nutrient cycling and support the plant's carnivorous lifestyle. Metatranscriptomic analyses have identified 220 microbial genera in trap samples, with 184 genera comprising at least 0.1% relative abundance, encompassing bacteria primarily from Proteobacteria and Firmicutes, alongside SAR protists and fungi.^[31] In G. filiformis traps, bacterial communities are dominated by Clostridium species from Firmicutes, adapted to the anoxic conditions inside the structures. Surveys of G. hispidula reveal 48 bacterial species, such as Burkholderia spp., and 29 fungal species, including Trichomonascus and Saitozyma.^[32] These microbes facilitate prey digestion by secreting enzymes like phosphatases, peptidases, and lipases, which break down captured microfauna and recycle nutrients back to the plant.^[31]^[32] Nitrogen-cycling bacteria, including ammonia oxidizers (10.6% relative abundance) and nitrite reducers (8.9%), are particularly enriched, aiding nutrient availability in oligotrophic habitats, though endophytic nitrogen fixation provides only limited contributions (<1% of total nitrogen gain).^[31] This symbiotic breakdown of prey remains enhances the efficiency of carnivory, with 92 genera showing preferential enrichment in traps compared to leaves, indicating specialized interactions within the trap microenvironment.^[31] Microbiome diversity is elevated in traps relative to roots and leaves, with 144–188 genera detected in G. nigrocaulis traps versus 39–73 in G. hispidula leaves.^[31] 16S rRNA gene sequencing across species has identified over 200 bacterial taxa, highlighting a complex food web that includes potential eukaryotic grazers like ciliates.^[31] Studies from 2014 to 2024 demonstrate that these communities are shaped by trap-specific conditions, with lower diversity in G. hispidula vesicles (traps) than leaves but still supporting digestive functions.^[32] The co-evolution of Genlisea with its microbiome likely bolsters carnivory in nutrient-poor soils, as evidenced by the consistent presence of digestion-aiding microbes and nitrogen cyclers across species, fostering mutualistic relationships that optimize prey utilization.^[31]^[32]

Ecology and Distribution

Habitats and Range

Genlisea species are confined to tropical regions of the Neotropics and Africa, with no representation in temperate zones, Asia, or other continents. The genus comprises approximately 30 species, of which approximately 70% occur in the Neotropics—primarily Brazil, Venezuela, and Colombia—while the remaining 30% are distributed across Africa from Guinea in West Africa southward to South Africa, including one species extending to Madagascar.^[20]^[33]^[34]^[7] The center of highest species diversity lies in the Espinhaço Range of southeastern Brazil, where endemic taxa dominate the unique campos rupestres ecosystem on nutrient-impoverished quartzite and sandstone substrates.^[7] Across their range, Genlisea inhabit wet savannas, peat bogs, sandstone outcrops, and montane cloud forests at elevations from near sea level to 3,000 meters, favoring acidic, sandy, oligotrophic soils that support their carnivorous adaptations.^[35]^[26] These plants thrive in tropical to subtropical climates characterized by pronounced wet-dry seasons, exhibiting tolerance to periodic flooding in their wetland microhabitats.^[36] In specialized settings like granitic inselbergs, tepui plateaus, and ephemeral flushes, Genlisea often co-occur with grasses (Poaceae) and sedges (Cyperaceae), forming part of open, herbaceous communities on exposed, infertile terrains. Altitudinal gradients drive distinct species zonation, with lowland forms in savannas giving way to high-elevation specialists in misty cloud forest edges and plateau summits.^[37]^[38]

Ecological Role

Genlisea species occupy a specialized niche in oligotrophic ecosystems, such as nutrient-poor white sands and moist outcrops in tropical regions, where they supplement limited soil macronutrients like nitrogen and phosphorus through carnivory.^[39] By trapping and digesting microfauna in their subterranean rhizophylls, these plants enhance their own nutrient uptake in environments where traditional root absorption is insufficient, thereby participating in localized nutrient dynamics within wetland food webs.^[2] This carnivorous strategy allows Genlisea to thrive in acidic, low-nutrient habitats, contributing to the cycling of organic matter as digested prey residues are integrated into the plant's biomass and eventually returned to the soil upon decomposition.^[40] In prey-predator interactions, Genlisea acts as an efficient predator of soil microfauna, capturing organisms such as ciliates (e.g., Paramecium multimicronucleatum), amoebae, soil mites, and bacteria through a passive yet effective "lobster pot" mechanism in their spiral traps.^[2] The traps' detentive hairs and geometry rectify the active motion of bacterial swimmers, creating an enrichment flux toward digestive vesicles (up to 10-15% increase in 2 hours), while entrapped ciliates facilitate threefold greater transport of debris and prey into these chambers.^[2] This dynamic supports a micro-food web within the traps, where some microbes may aid in prey breakdown, ultimately providing the plant with essential nitrogen that constitutes a significant portion of its nutrition in nitrogen-deficient soils.^[2]^[39] Genlisea allocates substantial biomass to its traps, with dry mass ratios of leaves to traps averaging 0.23 in unfertilized conditions, indicating that traps comprise roughly 80% of the foliar biomass and function as primary nutrient-acquisition organs in place of conventional roots.^[41] Above ground, the plants engage in mutualistic interactions with native insects for reproduction; for instance, Genlisea violacea is pollinated primarily by small bees of the genera Lasioglossum (Halictidae) and Ceratina (Apidae), with syrphid flies as occasional visitors, integrating into broader pollination networks in cerrado habitats.^[42] These interactions underscore Genlisea's role in supporting insect-mediated biodiversity in pristine, acidic wetland ecosystems.^[42]

Conservation Status

Several species within the genus Genlisea are evaluated under the IUCN Red List criteria, with assessments indicating significant conservation concerns for a subset of the approximately 30 species reviewed. Three species are classified as Critically Endangered (CR), two as Endangered (EN), and three as Vulnerable (VU), accounting for about 27% of the assessed taxa; an additional four species are categorized as Data Deficient (DD) due to insufficient information on their distributions and populations.^[43] For instance, Genlisea angolensis is listed as Endangered owing to its rarity and confinement to a single known location in the Democratic Republic of Congo and Angola, where ongoing habitat degradation exacerbates risks. Similarly, Genlisea barthlottii holds Vulnerable status, reflecting restricted range and susceptibility to environmental pressures in its Brazilian habitat. Genlisea metallica, endemic to the campos rupestres of Brazil, faces Critically Endangered or Endangered classification due to severe threats from habitat conversion.^[43] The primary threats to Genlisea species stem from anthropogenic activities and climatic shifts, particularly in their core ranges across Brazil's campos rupestres and other Neotropical regions. Habitat loss driven by mining and energy production affects 63% of assessed species, while agricultural expansion and aquaculture impact an equivalent proportion, leading to fragmentation and reduced population viability. Climate change and severe weather pose the most pervasive risk, affecting 90% of species through altered precipitation patterns and increased drought frequency in montane ecosystems; projections indicate potential losses of up to 82% of suitable habitat by 2070 in these areas. In fragmented habitats, population declines often exceed 30%, as isolated subpopulations struggle with reduced genetic diversity and heightened vulnerability to stochastic events. Competition from invasive species further compounds these pressures in disturbed sites, though direct evidence remains limited for Genlisea.^[43] Conservation efforts for Genlisea emphasize both in situ protection and supplementary ex situ measures, though challenges persist due to the genus's narrow endemism and cultivation difficulties. Several key populations benefit from inclusion in protected areas, such as Brazil's Serra do Cipó National Park, which harbors multiple endemic species amid the biodiverse campos rupestres and mitigates threats from mining and agriculture through regulated land use. No Genlisea species are currently listed under CITES Appendices, limiting international trade regulations, but national reserves play a critical role in preserving genetic diversity. Ex situ initiatives, including seed banking at facilities like the Millennium Seed Bank Partnership, support collections of orthodox-seeded species for long-term storage, while botanical gardens undertake propagation trials; however, reintroduction remains constrained by the plants' specialized requirements for nutrient-poor, wet substrates, hindering large-scale recovery programs. A 2020 assessment underscores the need for expanded monitoring, with 27% of species assessed as threatened (CR, EN, or VU) amid accelerating habitat fragmentation. As of 2025, no major changes to species counts or IUCN assessments have been reported.^[43]^[37]

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Plant Explorations in Guiana in 1944, Chiefly to the Tafelberg ... - jstor
to its discoverer, Bassett Maguire, of the New York Botanical Garden. ... Botanical Garden. Genlisea nigrocaulis is related to G. roraimensis N. E. Brown ...
[24]
A revision of Genlisea subgenus Tayloria (Lentibulariaceae) - Biotaxa
Five new species of Genlisea are described from Brazil, and all eight species of Genlisea subgenus Tayloria are described and illustrated, including remarks on ...Missing: divisions | Show results with:divisions
[25]
A revision of Genlisea subgenus Tayloria (Lentibulariaceae)
Aug 6, 2025 · The Genlisea genus includes approximately 30 species ... many species, as demonstrated by the high ploidy levels reported in the genus.<|control11|><|separator|>
[26]
The miniature genome of a carnivorous plant Genlisea aurea ...
Jul 15, 2013 · Genlisea aurea (Lentibulariaceae) is a carnivorous plant with unusually small genome size - 63.6 Mb – one of the smallest known among higher ...Missing: inflorescence hybridization
[27]
Smallest angiosperm genome | Guinness World Records
No other flowering plant (aka angiosperm) has a smaller genome (an organism's total genetic material) than the carnivorous Genlisea tuberosa, a corkscrew plant ...Missing: characteristics | Show results with:characteristics
[28]
Is the evolution of carnivory connected with genome size reduction?
Sep 3, 2020 · Genome size (1C) of analyzed carnivorous species varied from 63.5 Mbp (in Genlisea aurea) to 10,416.5 Mbp (in Drosophyllum lusitanicum), while ...<|control11|><|separator|>
[29]
https://www.guinnessworldrecords.com/world-records/634073-smallest-angiosperm-genome
[30]
https://bsapubs.onlinelibrary.wiley.com/doi/10.1002/ajb2.1526
[31]
Revision of the genus Genlisea (Lentibulariaceae) in Africa and ...
Jun 28, 2008 · All African material belongs to subgenus Genlisea and can be assigned to 10 taxa, which mainly differ in indumentum of calyx, corolla and ovary.Missing: morphology | Show results with:morphology
[32]
Comparative genomic analysis of Genlisea (corkscrew plants ... - NIH
Jan 2, 2018 · Average p-distances were calculated to determine genetic divergence between Genlisea species and the number of phylogenetically informative ...
[33]
Revision of the genus Genlisea (Lentibulariaceae) in Africa and ...
All African material belongs to subgenus Genlisea and can be assigned to 10 taxa, which mainly differ in indumentum of calyx, corolla and ovary. The former ...
[34]
Structural Features of Carnivorous Plant (Genlisea, Utricularia ...
Jul 21, 2020 · We aimed to examine and compare the tuber structure of two taxonomically and phylogenetically divergent terrestrial carnivorous plants: Genlisea ...
[35]
(PDF) A New and Tuberous Species of Genlisea (Lentibulariaceae ...
Aug 9, 2025 · For example, Genlisea tuberosa Rivadavia (Lentibulariaceae) forms subterraneous tubers during the dry, winter season to endure until the wet ...
[36]
(PDF) A new species of corkscrew plant (Genlisea, Lentibulariaceae ...
Aug 6, 2025 · Genlisea multiflora has been recorded from Viruá National Park, and is of affinity to the large, purple-flowered species G. sanariapoana and G.<|control11|><|separator|>
[37]
Metatranscriptome analysis reveals host-microbiome interactions in ...
Overall we found in Genlisea trap samples 184 out of total 220 uniquely detected genera having at least 0.1% relative abundance of either bacteria, SAR protists ...
[38]
Metatranscriptome analysis reveals host-microbiome interactions in ...
Likely, Genlisea plants absorb N-nutrients via carnivory. For P-nutrient demand of Genlisea plants, there are four up-regulated genes, of which proteins are ...
[39]
[PDF] Soil fertilization enhances growth of the carnivorous plant Genlisea ...
The final leaf : trap DM ratio was. 0.23 in the controls and increased statistically signifi- cantly to 0.32 in fertilized plants. Generally, the small.Missing: percentage | Show results with:percentage
[40]
https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2015.00526/full
[41]
https://www.butbn.cas.cz/adamec/Biolog2.pdf