Dear Gurcharan ji, * *
*Dioscorea oppositifolia* L. Nelson, 1982, Schubert, 1975 Synonym: Dioscorea batatas Decne. *Dioscorea polystachya* Turczaninow, Bull. Soc. Imp. Naturalistes Moscou. 10(7): 158. 1837. Synonym:* Dioscorea batatas* Decaisne; *D. decaisneana* Carrière; *D. doryphora* Hance; *D. potaninii* Prain & Burkill; *D. rosthornii* Diels; *D. swinhoei* Rolfe. It seems that both the plants have same synonym *D batatas* but now it is placed as a distinct species namely *D oppositifolia* and *S polystachya*. Regards, Tanay On Sun, May 16, 2010 at 6:22 PM, Gurcharan Singh <[email protected]> wrote: > Tanay > I hope you can dig out the differences between D. oppositifolia and D. > polystachya, first occurring only in India and latter in China, Japan and > also grown in USA. Many people in error consider them to be synonymous, but > I think they are distinct. I could not find clear cut differences. > > > -- > > Dr. Gurcharan Singh > Retired Associate Professor > SGTB Khalsa College, University of Delhi, Delhi-110007 > Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > Phone: 011-25518297 Mob: 9810359089 > http://people.du.ac.in/~singhg45/ > > > > On Sun, May 16, 2010 at 6:17 PM, tanay bose <[email protected]> wrote: > >> Dear Gurcharan ji, >> >> >> >> Nice photos. The genus *Dioscorea *contain a medicinally important >> secondary metabolite known as Diosgenin, a steroid sapogenin, is the >> product of hydrolysis by acids, strong bases, or enzymes of saponins, >> extracted from the tubers of Dioscorea wild yam, such as the >> Kokoro<http://en.wikipedia.org/wiki/Kokoro_%28vegetable%29>. >> The sugar-free (aglycone), diosgenin is used for the commercial synthesis of >> cortisone, pregnenolone, progesterone, and other steroid products. >> >> It is present in *Costus speciosus*, *Smilax menispermoidea*, species of >> *Paris*, *Trigonella*, and *Trillium<http://en.wikipedia.org/wiki/Trillium> >> *, and many species of *Dioscorea - D. althaeoides, colletti, >> futschauensis, gracillima, hispida, hypoglauca, >> mexicana*<http://en.wikipedia.org/wiki/Diosgenin#cite_note-urlDioscorea_mexicana_information_from_NPGS.2FGRIN-0> >> *nipponica, panthaica, parviflora, septemloba*, and *zingiberensis*. >> >> Diosgenin is the precursor for the semisynthesis of progesterone which in >> turn was used in early combined oral contraceptive pills. The unmodified >> steroid has estrogenic >> activity<http://en.wikipedia.org/wiki/Diosgenin#cite_note-pmid15372201-4> >> and can reduce the level of serum cholesterol. >> >> Regards >> >> Tanay >> >> On Sun, May 16, 2010 at 4:05 PM, Gurcharan Singh <[email protected]>wrote: >> >>> Dioscorea oppositifolia L. from Delhi University Botanical Garden, Delhi. >>> This species grows only in India, but is often confused with Chinese yam D. >>> polystachya. >>> >>> Sans: amlardraka, sarpakhya; Tel: Yellagadda, adairdumpa; Tam: >>> Kavalakodi, velilai valli; Hindi: Matti Aloo; Mal: Kachil; Mar: Paspoli, >>> gilandru; Oriya: Pittaloo; Kan: Inasara, nirbatte. >>> Underground tubers often reaching size of up to 10 kg are cooked as >>> vegetable. Tubers are ground and applied to swellings also. >>> >>> -- >>> Dr. Gurcharan Singh >>> Retired Associate Professor >>> SGTB Khalsa College, University of Delhi, Delhi-110007 >>> Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. >>> Phone: 011-25518297 Mob: 9810359089 >>> http://people.du.ac.in/~singhg45/ >>> >>> >> >> >> -- >> Tanay Bose >> +91(033) 25550676 (Resi) >> 9830439691(Mobile) >> 9674221362 (Mobile) >> >> > > > > -- Tanay Bose +91(033) 25550676 (Resi) 9830439691(Mobile) 9674221362 (Mobile) -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/indiantreepix?hl=en.
