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Karthigeyan K.,Madras Christian College | Jayanthi J.,Madras Christian College | Sumathi R.,Foundation for Revitalisation of Local Health Traditions
Nordic Journal of Botany | Year: 2011

A new species, Lasianthus chowdheryi Karthig., Jayanthi & Sumathi (Rubiaceae), growing in the evergreen forest of Rutland Island in the Andaman and Nicobar archipelago is described. The new species is allied to L. attenuatus Jack, but differs by having tetramerous flowers, smaller corolla tube and by the presence of a horny appendage on the calyx and corolla apices. Detailed description and illustration of this new taxon are provided. © 2011 The Authors.


Murugan R.,Foundation for Revitalisation of Local Health Traditions | Livingstone C.,Madras Christian College
Rheedea | Year: 2010

Pogostemon raghavendranii R. Murugan et Livingst., a new species from Akkamalai shola, Valparai, Coim-batore district, Tamil Nadu is described and illustrated. This new species can be placed under the section Racemosus (Benth.) Bhatti et Ingr. and subsection Glabriusculus (Briq.) Bhatti et Ingr., as it lacks moniliform trichomes on the filaments. Morphological differences among the species under subsection Glabriusculus are tabulated and a distribution map is also provided.


Murugan R.,Foundation for Revitalisation of Local Health Traditions | Mallavarapu G.R.,Renaissance Temple Bells | Padmashree K.V.,Foundation for Revitalisation of Local Health Traditions | Rao R.R.,Central Institute of Medicinal and Aromatic Plants | Livingstone C.,Madras Christian College
Natural Product Communications | Year: 2010

The volatile oil of the leaves of Pogostemon heyneanus Benth. (Lamiaceae) was analyzed by GC and GC-MS. Twenty-six components representing 96.0% of the oil were identified. The major components of the oil were acetophenone (51.0%), β-pinene (5.3%), (E)-nerolidol (5.4%), and patchouli alcohol (14.0%). Comparison of the compositions of the oils of P. heyneanus and P. cablin (Blanco) Benth. (Patchouli oil) showed wide variation between them. Though 13 sesquiterpenes and oxygenated sesquiterpenes were detected in both oils, their concentrations in the oils differed widely. Acetophenone, benzoyl acetone and (E)-nerolidol present in the oil of P. heyneanus were not detected in patchouli oil.


Murugan R.,Foundation for Revitalisation of Local Health Traditions | Ravikumar K.,Foundation for Revitalisation of Local Health Traditions | Livingstone C.,Madras Christian College
Rheedea | Year: 2010

Pogostemon nilagiricus Gamble (Lamiaceae) is rediscovered from Nilgiri hills, the type locality, after a gap of 97 years. A detailed description, photograph and note on its taxonomy are provided. Current threat status has also been assessed based on the recent botanical explorations.


Karthigeyan K.,Botanical Survey of India | Maina V.,Indian Central Arid Zone Research Institute | Sumathi R.,Foundation for Revitalisation of Local Health Traditions | Jayanthi J.,Western Regional Center | Jalal J.S.,Western Regional Center
Phytotaxa | Year: 2014

Habenaria osmastonii, a new species of terrestrial orchid is described from Rutland Island of the Andaman Islands, India. This species differs from H. richardiana by having radical leaves, fewer and smaller flowers, shallowly denticulate, falcate lip side lobes and a lip midlobe slightly longer than the side lobes. A detailed description, illustrations and photographs are provided. © 2014 Magnolia Press.

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