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Curcuma aromatica

Curcuma aromatica Salisb., commonly known as wild turmeric or kasturi manjal, is a perennial rhizomatous herb belonging to the Zingiberaceae family, native to the tropical and subtropical regions of South and Southeast Asia.^[1] It features an erect stem up to 1 meter tall, large oblong leaves, and short, ovate pseudostems, with its defining characteristic being the light yellow, aromatic rhizomes that emit a camphor-like scent.^[2] These rhizomes are the primary part used, harvested for their bioactive compounds, and the plant thrives in seasonally dry tropical biomes, growing primarily in loamy, well-drained soils.^[1] Widely distributed across countries including India, Bangladesh, China, Myanmar, Nepal, and Sri Lanka, C. aromatica is cultivated for both medicinal and cosmetic purposes, with introduced populations in areas like Thailand and Cambodia.^[1] In traditional medicine systems such as Ayurveda and Siddha, the rhizomes have been employed for centuries to treat skin disorders, wounds, inflammation, gastrointestinal issues, and as a complexion enhancer due to their antiseptic and carminative properties.^[2] Similarly, in traditional Chinese medicine, it is valued for promoting blood circulation, alleviating pain, and addressing blood stasis, particularly in conditions like coronary heart disease.^[3] Phytochemically, C. aromatica is rich in curcuminoids (such as curcumin and demethoxycurcumin), essential oils (including ar-turmerone and linalool), sesquiterpenoids (like curzerene and curdione), and other compounds like flavonoids and terpenoids, contributing to its numerous identified bioactive molecules.^[2] Pharmacological studies have demonstrated its potent antioxidant activity, scavenging free radicals with IC50 values as low as 1.57 µg/ml in DPPH assays, and anti-inflammatory effects by reducing edema and cytokine production.^[2] It also exhibits anticancer properties, inducing apoptosis in prostate and colon cancer cells, antimicrobial efficacy against Gram-positive bacteria like Staphylococcus aureus, and antidiabetic potential by lowering blood glucose in animal models.^[2] Additionally, research highlights its role in cardiovascular health, modulating pathways like PI3K/AKT/mTOR to improve lipid metabolism and reduce myocardial damage in coronary heart disease models.^[3] Beyond medicine, C. aromatica serves as a natural dye and in cosmetics for its skin-lightening and wound-healing benefits, though overharvesting poses risks to wild populations in native habitats.^[2] Ongoing research emphasizes its therapeutic mechanisms, underscoring the need for sustainable cultivation to preserve this valuable plant species.^[3]

Taxonomy

Classification

Curcuma aromatica is classified within the kingdom Plantae, phylum Tracheophyta, class Liliopsida, order Zingiberales, family Zingiberaceae, genus Curcuma, and species C. aromatica.^[1] This perennial herbaceous plant was first described botanically by Richard Anthony Salisbury in his 1808 publication Paradisus Londinensis.^[1]^[4] Within the genus Curcuma, which includes 174 accepted species primarily distributed in tropical Asia, C. aromatica is closely related to but distinct from C. longa (common turmeric); the two species differ in morphological traits such as rhizome coloration—paler yellow in C. aromatica compared to the deeper orange in C. longa—and aroma intensity, alongside genetic distinctions evidenced by amplified fragment length polymorphism (AFLP) markers and internal transcribed spacer (ITS) sequence variations that cluster them separately. No infraspecific taxa are currently recognized.^[5]^[6]^[7]^[8]

Etymology and synonyms

The genus name Curcuma derives from the Arabic word karkum or kurkum, meaning "saffron" or referring to the yellow color of the rhizomes, a term adopted into Medieval Latin to describe plants with saffron-like properties.^[9] The specific epithet aromatica comes from the Latin aromaticus, denoting the strong, pleasant fragrance emitted by the plant's rhizomes, which contain essential oils responsible for its scent.^[1] Accepted synonyms for Curcuma aromatica Salisb. include Curcuma wenyujin Y.H.Chen & C.Ling, originally described from China but later synonymized based on morphological and distributional overlap.^[1] Additionally, Curcuma zedoaria Roxb. has been misapplied to this species in some older literature, leading to nomenclatural confusion, though the true C. zedoaria (Christm.) Roscoe is distinct and lacks the same aromatic profile.^[1] Common names for Curcuma aromatica vary regionally, reflecting its use in traditional systems. In English, it is known as wild turmeric or kasturi turmeric, the latter emphasizing its cosmetic applications in India.^[10] In Hindi, it is called jangli haldi (jungle turmeric), while Sanskrit names include aranyaharidra (forest turmeric) and vanaharidra.^[11] In Southeast Asia, regional variations include kunchur in Malaysia and gajutsu in Japan, highlighting its broader cultural recognition across India and neighboring countries.^[12]

Description

Morphology

Curcuma aromatica is a perennial herbaceous plant characterized by its stout, aromatic underground rhizomes, which serve as the primary storage and propagation structures. The rhizomes are typically palmately branched, measuring 5-10 cm in length and 2-5 cm in diameter, with an external surface that is yellowish-brown to dark grey and marked by circular rings from old leaf bases. Internally, they are orange to deep orange, emitting a camphoraceous odor due to their essential oil content. These rhizomes produce numerous sessile tubers, contributing to the plant's vegetative reproduction.^[13]^[14]^[15] The foliage emerges from erect pseudostems that can reach up to 1 m in height, forming a rosette arrangement. Leaves are lanceolate to oblong-lanceolate, 30-60 cm long and 10-20 cm wide, with an acuminate apex, deltoid base, and sheathing bases that clasp the stem. The upper surface is green and often variegated, while the lower surface is pubescent, providing a velvety texture. Petioles are long, supporting the blade in an upright posture.^[13]^[14]^[15] The inflorescence is a dense, spike-like structure arising directly from the rhizome base, typically 15-30 cm long and 3-5 cm in diameter, appearing in early spring before full leaf development. It features overlapping bracts: coma bracts at the apex are 5-7.5 cm long and tinged pink or red, while flowering bracts are ovate, 3.8-5 cm long, and pale green. The flowers are fragrant, pinkish-white with an orange-yellow labellum, and shorter than the bracts; the overall plant height during flowering ranges from 40-100 cm.^[13]^[15] Seasonally, C. aromatica exhibits deciduous foliage that grows vigorously during the monsoon season, reaching full height by mid-summer. In late autumn, the leaves senesce and die back, leaving the rhizomes dormant through winter, from which new shoots emerge in spring. This cycle ensures survival in its tropical to subtropical native ranges.^[13]

Reproduction

Curcuma aromatica is a perennial geophyte with a life cycle marked by seasonal dormancy (2n = 42). The aboveground foliage senesces and dies back in late autumn, allowing the plant to survive unfavorable conditions through its underground rhizomes, which remain dormant until the following growing season. This adaptation enables persistence in tropical and subtropical environments with distinct wet and dry periods.^[16]^[17] In native habitats, reproduction begins with the emergence of inflorescences from the rhizomes prior to leaf development, typically during the pre-monsoon period. Flowering occurs from May to June, producing cone-shaped spikes with pale green fertile bracts and white coma bracts tinged red. The flowers feature a funnelform corolla and yellow labellum, attracting pollinators.^[18]^[19] Pollination in C. aromatica is primarily zoophilous, mediated by insects such as bees and butterflies drawn to the nectar-rich blooms. Successful pollination leads to the formation of dehiscent capsules containing numerous small seeds encased in a lacerate white aril; however, seed viability is generally low, limiting sexual reproduction.^[20]^[21]^[17] Consequently, clonal propagation via rhizome fragmentation dominates the reproductive strategy, facilitating rapid spread and establishment in suitable habitats while minimizing reliance on infrequent viable seeds.^[15]^[19]^[18]

Distribution and habitat

Native range

Curcuma aromatica is native to the Indian subcontinent, East Himalaya, Myanmar, Bangladesh, Nepal, Sri Lanka, south-central China, Tibet, and Vietnam, with key regions including India (particularly the Western Ghats and Northeast India), Sri Lanka, and Myanmar.^[1]^[19] In India, it occurs naturally in forested areas of the Western Ghats spanning Kerala and Tamil Nadu, as well as in the northeastern states like Assam.^[22]^[23] The species has been introduced and cultivated in Thailand, Japan (where it is known as spring turmeric), and other areas.^[1]^[24] Historically, C. aromatica has been confined to the monsoon-influenced forests of South and Southeast Asia, reflecting its long-standing presence in these tropical regions.^[1] Current wild populations remain scattered in the humid forest understories of Kerala, Tamil Nadu, and Assam in India, though they are increasingly threatened by habitat loss and overharvesting.^[12]^[25] These populations contribute to the species' persistence in its native monsoon ecosystems.^[19]

Ecological preferences

Curcuma aromatica thrives in shady understories of deciduous forests, grasslands, and forest edges within humid, tropical climates, particularly in monsoonal regions where it benefits from seasonal rainfall patterns. This species is adapted to warm forest areas, exhibiting rapid growth during the summer monsoon and entering dormancy in drier periods, with foliage dying back in late autumn and rhizomes remaining underground through winter. It prefers partial shade to avoid direct sunlight, showing sensitivity to full exposure which can stress the plant.^[19]^[26] The plant favors well-drained loamy soils that are humus-rich and moist, with a pH range of 5.5-6.5, avoiding waterlogged or alkaline conditions that hinder root development. Optimal climatic conditions include daytime temperatures of 22-27°C and annual rainfall of 1100-1500 mm, concentrated in monsoonal patterns to support its growth cycle without excessive drought. A minimum temperature of 15°C is required to prevent frost damage, underscoring its intolerance to cold.^[12]^[19] In its natural habitat, C. aromatica often grows alongside other members of the Zingiberaceae family, such as Curcuma longa and Curcuma amada, in monsoon-influenced ecosystems of the eastern Himalayas and similar tropical environments. This association contributes to shared microhabitats with ample humidity and organic matter, enhancing mutual resilience to seasonal variations.^[26]^[19]

Cultivation

Propagation

Curcuma aromatica is primarily propagated vegetatively through rhizome division, as this method ensures genetic uniformity and high multiplication rates essential for commercial cultivation. Mature rhizomes are harvested after the growing season and divided into propagules weighing 10-20 g, each containing at least one healthy bud or sprout to promote shoot emergence. These pieces are treated to prevent fungal infections and planted horizontally in well-prepared nursery beds with loose, fertile soil enriched with organic matter, at a depth of 5-7 cm and spacing of 15-20 cm between plants. This approach allows for rapid establishment, with sprouts appearing within 2-4 weeks under optimal conditions.^[27] Seed propagation is rarely practiced due to low seed set in cultivation and poor germination rates resulting from dormancy and environmental sensitivity typical in the Zingiberaceae family. Rhizome planting for vegetative propagation is timed for May-June in tropical regions like India, aligning with the onset of the monsoon to provide natural irrigation and support initial root development, achieving establishment success rates of 80-90% with proper site preparation. Unlike natural reproduction in wild habitats, which involves sporadic seed dispersal and rhizome sprouting, cultivated propagation prioritizes controlled vegetative division for reliability and yield optimization.^[28]

Micropropagation

Due to the species' threatened status and limited availability of planting material, micropropagation via tissue culture is increasingly used for mass propagation and conservation. Rhizome sprouts or axillary buds serve as explants, cultured on Murashige and Skoog (MS) medium supplemented with benzyladenine (BA) (2-4 mg/L) and indole-3-acetic acid (IAA) (0.5-1 mg/L) to induce multiple shoots (up to 12 per explant), followed by rooting on MS with IAA and acclimatization. This method produces genetically uniform plants and supports sustainable cultivation.^[29]^[30]

Growing conditions

Curcuma aromatica thrives in well-drained sandy loam or red loamy soils enriched with organic matter, with an ideal pH range of 5.5 to 7.0 to support optimal root development and rhizome growth.^[31] Soil preparation involves thorough ploughing to achieve a fine tilth, followed by incorporation of farmyard manure at 20-40 t/ha to enhance fertility and structure.^[32] Rhizomes are planted at a spacing of 30 x 15 cm to allow adequate aeration and nutrient access, typically at a depth of 5 cm with buds facing upward.^[33] The crop requires consistent soil moisture for vigorous growth, achieved through regular irrigation to prevent water stress, particularly in rainfed systems supplemented during dry spells to mimic the 1500-2500 mm annual rainfall preferred in tropical regions.^[31] Fertilization typically includes NPK at rates of 100:50:100 kg/ha, with nitrogen and potassium split-applied at planting and 30-60 days after to promote tillering and rhizome bulking, often combined with organic inputs like 25-40 t/ha farmyard manure for sustainable nutrient supply.^[33]^[34] Harvesting occurs 7-9 months after planting, once leaves yellow and the above-ground foliage dries, signaling rhizome maturity; the process involves careful digging to avoid damage, yielding 10-15 tons/ha of fresh rhizomes under standard conditions, though higher outputs up to 27 t/ha are possible with optimized practices.^[32]^[31] Major cultivation areas in India include Kerala, West Bengal, and parts of Northeast India, where the crop is grown both commercially and in home gardens for its aromatic rhizomes.^[35]

Phytochemistry

Essential oils

The essential oils of Curcuma aromatica are volatile aromatic compounds primarily extracted from the rhizomes and leaves through steam distillation or hydrodistillation. Yields from rhizomes typically range from 0.4% to 0.7% (v/w) on a dry weight basis, while leaf oils yield approximately 0.5% (v/w).^[36]^[37] Regional variations influence the oil profile; for instance, Indian samples often exhibit higher 1,8-cineole content compared to Japanese ones, where sesquiterpenes like curdione predominate.^[38] The chemical composition of these oils is determined using gas chromatography-mass spectrometry (GC-MS), which identifies individual constituents based on retention times and mass spectra. Monoterpenes and sesquiterpenes dominate the oils, accounting for 70-80% of the total composition.^[39] In rhizome oils, major monoterpenes include 1,8-cineole (synonymous with eucalyptol, up to 20%) and camphor (12-25%), while key sesquiterpenes are curzerenone (10-15%) and curdione (up to 15%).^[40]^[39] For example, GC-MS analysis of Indian rhizome oils has reported camphor at 18.8-32.3% and 1,8-cineole at 5.5-12.2%.^[40] Leaf oils show a similar monoterpene-sesquiterpene balance but with elevated oxygenated monoterpenes. Representative analyses reveal 1,8-cineole at up to 24%, camphor at 24.0-28.5%, and curdione at 15.31%.^[40]^[37] These variations underscore the influence of plant part and geographic origin on the volatile profile.

Other compounds

The rhizomes of Curcuma aromatica contain the non-volatile curcuminoids, primarily curcumin (0.08–0.46% dry weight), demethoxycurcumin (0.11–0.21% dry weight), and bisdemethoxycurcumin (0.04% dry weight), with total curcuminoid levels typically ranging from 0.3% to 0.6% of the dry rhizome mass depending on extraction conditions and plant variability.^[41]^[42] Additional non-volatile phytochemicals include the sterol glycoside β-sitosterol-3-O-β-D-glucopyranoside, which has been isolated from ethyl acetate extracts of the rhizomes.^[43] The species also features flavonoids and phenolic acids, with total phenolic content in rhizomes reported at approximately 67 mg gallic acid equivalents per gram dry weight (equivalent to 397 mM GAE/g).^[42] These compounds are more abundant in the rhizomes than in leaves, and ethyl acetate extracts of the rhizomes serve as the richest source for their isolation and analysis.^[43]^[42]

Traditional and modern uses

Medicinal uses

In traditional Ayurvedic medicine, Curcuma aromatica rhizomes are applied as pastes to treat skin disorders, wounds, and inflammation, leveraging their purported antibacterial properties for conditions like acne and eczema.^[44] The plant has also been used historically for alleviating cough, fever, epilepsy, convulsions, spasms, and general skin infections, often in the form of poultices to promote wound healing and reduce scarring.^[44] These applications stem from its role in folk medicine across India and Southeast Asia, where the rhizomes are valued for blood purification and pain relief.^[45] Modern pharmacological research has substantiated several of these traditional uses, particularly through studies on its anti-inflammatory effects mediated by curcuminoids, which inhibit pro-inflammatory pathways such as NF-κB.^[46] Essential oils from the rhizomes exhibit antimicrobial activity against pathogens like Staphylococcus aureus, with inhibition zones comparable to standard antibiotics in in vitro assays.^[47] Antioxidant properties are evident in DPPH radical scavenging assays, where methanol extracts show an IC50 value of 16.58 μg/ml, indicating potent free radical neutralization comparable to ascorbic acid.^[48] Additional investigations reveal anti-diabetic potential, with toluene extracts reducing serum glucose levels in alloxan-induced diabetic rat models from 278.53 to 116.5 mg/dl after treatment.^[49] Anti-tumor effects have been observed in aqueous extracts, which induce apoptosis and G2/M arrest in colon carcinoma cells, inhibiting proliferation in vitro.^[50] Regarding dosage and administration, traditional decoctions of the rhizome are typically prepared at 5-10 g per day for internal use in Ayurvedic formulations to support anti-inflammatory and wound-healing outcomes.^[51] Essential oils are applied topically for antimicrobial and anti-inflammatory benefits, often diluted in carriers. Clinical studies on wound healing, primarily in animal models, demonstrate accelerated granulation tissue formation and reduced inflammation with rhizome extracts in excision wound assays, though human trials remain limited and call for further validation.^[52]

Cosmetic and other uses

Curcuma aromatica, commonly known as wild turmeric or Kasturi manjal, has been traditionally utilized in cosmetic applications, particularly in South Asian and Southeast Asian beauty practices.^[44] The rhizome powder is mixed into face packs and ubtans (traditional herbal pastes) to promote skin brightening and provide anti-aging effects, often applied during pre-wedding rituals for a radiant complexion without the staining associated with common turmeric.^[44] In modern formulations, extracts of the plant are incorporated into hydrogel patches and facial masks designed for cosmetic skin care, offering a smooth and visually appealing application suitable for daily use, including a 2025 study on extract-loaded hydrogel patches for acne and inflammation treatment.^[53] The essential oil, derived from the rhizomes, imparts a warm, earthy fragrance and is employed in aromatherapy blends and perfumery for its grounding scent profile.^[54] In culinary contexts, Curcuma aromatica sees limited application as a spice and natural colorant in regional Indian dishes, where its rhizomes add a subtle aromatic flavor to condiments and food additives.^[54] The leaves are occasionally used to wrap and steam foods like fish, imparting a mild earthy note during cooking.^[54] Beyond cosmetics and cuisine, the plant holds cultural significance in Hindu traditions, where the rhizome powder features in wedding rituals such as the haldi ceremony for bridal beautification, symbolizing purity and prosperity.^[44] The rhizomes also serve as a source of natural yellow dye for textiles and fibers, as demonstrated in traditional dyeing processes for materials like banana fibers.^[55] Additionally, the plant's vibrant pink bracts are valued for decorative purposes in festivals, enhancing ornamental displays with their striking appearance.^[56]

Conservation

Status

Curcuma aromatica has not been assessed globally by the International Union for the Conservation of Nature (IUCN), and is thus classified as Not Evaluated (NE).^[57] Regionally, however, it is regarded as endangered in India, primarily owing to habitat loss and overexploitation.^[13] Wild stocks of C. aromatica are declining, with natural populations restricted to fragmented habitats in areas such as the Western Ghats.^[58] This underscores the urgency for conservation efforts. The species is used in traditional medicine in India. Exports of wild-collected material contribute to depletion.^[59]

Threats and protection

Curcuma aromatica faces significant threats from overharvesting driven by its high demand in pharmaceutical and cosmetic industries, which predominantly rely on wild-sourced rhizomes for essential oils and bioactive compounds.^[60] Deforestation in its native forested habitats across South Asia further exacerbates population declines by fragmenting ecosystems and reducing available growing areas.^[54] Additionally, the species exhibits a low natural propagation rate, characterized by slow rhizome division and rare seed production, making natural recovery challenging without intervention.^[60] Protection efforts for C. aromatica emphasize both in situ and ex situ strategies to preserve genetic diversity. In situ conservation occurs within protected areas in India, such as the Silent Valley National Park in Kerala, where the species benefits from habitat safeguarding amid the Western Ghats biodiversity hotspot.^[61] Ex situ measures include cultivation in botanical gardens and storage in national seed banks or gene repositories, which maintain viable germplasm for potential reintroduction and breeding programs.^[59] Ongoing initiatives focus on reducing pressure on wild populations through sustainable practices. In Kerala, promotion of cultivated varieties encourages farmer adoption to meet market needs without depleting natural stocks.^[35] Research into micropropagation techniques, using rhizome explants on optimized media, enables mass production of disease-free plantlets, supporting conservation by minimizing reliance on wild harvesting.^[60]

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Jan 23, 2015 · Curcuma aromatica Salisb. mentioned as 'Vanaharidra' in Ayurveda, belongs to the 'ginger family' Zingiberaceae. It is a perennial herb with ...<|separator|>
[48]
A Comprehensive Review on the Therapeutic Potential of Curcuma ...
The turmeric plant needs a rich and friable soil with just a little sand content. It grows in irrigated and rain-fed areas on light black, ashy loam, and red ...Missing: preferences | Show results with:preferences
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Antibacterial Activity of Rhizome of Curcuma aromatica and Partial ...
Antibacterial Activity of Rhizome of Curcuma aromatica and Partial Purification of Active Compounds ... Studies on Curcumin and Curcuminoids part 21. Variation in ...
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Essential oil composition and antioxidant activities of Curcuma ...
The chemical composition of the hydro-distilled essential oil from leaves of Curcuma aromatica Salisb. was analysed by GC-MS.
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(PDF) Antioxidant and antidiabetic activity of Curcuma aromatica
Aug 8, 2025 · After the treatment with the toluene extract of Curcuma aromatica, serum glucose level was found to be decreased from 278.53 to 116.5 mg/dl, ...
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Aqueous extract of Curcuma aromatica induces apoptosis and G2/M ...
Feb 24, 2011 · This study suggests that AECA might be effective as an antiproliferative herb for colon carcinoma, the antitumor activity of AECA may involve ...
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Phytochemical and pharmacological properties of Curcuma ...
Oct 10, 2020 · Curcuma aromatica is an essential herbal plant and it has been extensively used in traditional medicine for centuries. It has been used for the ...
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Anti inflammatory and wound healing activity of Curcuma aromatica ...
It also showed significant wound healing activity in excision wound model. Thus, resultant anti-inflammatory activity might be due to effects on several ...Missing: decoctions | Show results with:decoctions
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https://www.researchgate.net/publication/394926732_Natural_dyeing_of_banana_fibres_for_fashion_accessories
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[PDF] Phenological Studies Of Curcuma Caesia Roxb. And Curcuma ...
Jul 5, 2019 · Curcuma caesia is a critically endangered and C. aromatica is a threatened species as per the IUCN Red List of threatened species. Human ...
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haridrā (curcuma longa linn.) in ayurvedic pharmacopoeia
Jun 19, 2018 · ... Curcuma aromatica and Curcuma amada based ... [Show full abstract] and standardization in accordance with Ayurvedic Pharmacopoeia of India ...
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Status and consolidated list of threatened medicinal plants of India
May 25, 2021 · As per IUCN classification, species are assigned a ranked threat category, such as extinct (EX), extinct in wild (EW), critically endangered (CR) ...
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Micropropagation and antimicrobial activity of Curcuma aromatica ...
Aug 7, 2025 · A rapid and improved micropropagation protocol was developed for Curcuma aromatica, a threatened aromatic medicinal plant, using rhizome ...
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Western Ghats @ CES : A Hot Spot of Aromatic & Medicinal Plants
The Silent Valley in the Western Ghats preserves the true bio-diversity of the region. About 700 species of medicinal herbs are found here and are used in ...