Peristylus sahanii Kumar, G.S.Rawat & Jalal 2010

In Situ Nepal

LCDP Photo/in situ photo by Bhakta Bahadur Raskoti and The Molecular phylogeny and morphology reveal a new epiphytic species of Habenaria (Orchidaceae; Orchideae; Orchidinae) from Nepal Website


Common Name Sahan's Peristylus [The first author's father Mr K. L. Sahani who motivated him to explore the forests of Jharkhand for the survey of orchids and although being an engineer, even accompanied him on several field trip

Flower Size .6" [1.5 cm]

Found in northestern India on shady forested slopes at elevations around 450 meters as a medium sized, hot growing terrestrial with a [sometimes with an old tuber presesnt] subglobose tuber giving rise to an erect stem carrying clear green, scattered on the lower half of the stem, unequal, tapering towards the abse , upper ones ovate, , lower ones obovate, acute, undulate margins, 3 veined, sheathing base leaves that blooms in the later summer and early fall on an erect, terminal, peduncle to 6" [15 cm] long, terete, provided with 2, amplexicaul, steril bracts, to 10" [25 cm] long overall, many flowered inflorescence

"The species appears to be similar to Peristylus stocksii (Hook. f.) Kraenzl. (syn: Habenaria stocksii Hook. f.) through comparison of the type specimen with the type description of P. stocksii in Hooker (1890) and Kraenzlin (1898). Digital images of herbarium sheets in K (Stocks s.n., Stocks 173 and Ritchie 1398) were also examined to help determine the differences. Character of Peristylus stocksii vs Peristylus sahanii Leaves Clustered vs Scattered towards lower half of stem Leaf apex Acute or acuminate vs Acute Tubers Oblong-ellipsoid vs Subglobose Inflorescence Secund vs Subsecund Flowers Yellow vs Yellowish-green Floral bracts Longer than ovary vs Shorter than ovary Lateral sepal Linear-oblong vs Oblong-ovate Dorsal sepal Elliptic vs Ovate-elliptic Dorsal petal Ovate-obtuse Obliquely ovate-elliptic Lip Shorter than sepals vs Longer than sepals Sidelobes of lip Spreading sideways, margin minutely retuse towards the apexvs Spreading downwards, margin entire throughout. Distribution Concan and Mysore vs Chotanagpu." Pankaj Kumar, Gopal Singh Rawat & Jeewan Singh Jalal 2010


References W3 Tropicos, Kew Monocot list , IPNI ; *Peristylus sahanii, a new species of Orchidaceae from India Pankaj Kumar, Gopal Singh Rawat & Jeewan Singh Jalal 2010 photo/drawing fide