Dioscorea belophylla (Prain) Voigt ex Haines (Indian Subcontinent: Assam, Bangladesh, East Himalaya, India, Nepal, West Himalaya as per POWO)
Dioscorea pubera Blume (Central Himalaya to W. Malesia: Assam, Bangladesh, East Himalaya, India, Jawa, Myanmar, Nepal, Sumatera as per POWO)
Dioscorea wattii Prain & Burkill (E. Himalaya to Bangladesh: Assam, Bangladesh, East Himalaya as per POWO)
Florae Indicae Enumeratio: Monocotyledonae, written by S.Karthikeyan, S.K.Jain, M.P.Nayar & M.Sanjappa, and published by Botanical Survey of India is an important reference for names and distribution of Dioscoreaceae species in India.
As per this document (Karthikeyan et al. 1989) following species of Dioscorea occur in India:
Scrutiny of these names in The Plant List indicate one name as synonym.
In addition to these species following are also reported from India by Saikia et al. 2011 (sp. no-34, 36, 37, 38, 39), Goswami et al. 2013 ( sp. no-34 ) and Flora of China (sp. no-35 ).
34. D. brandisii Prain & Burkill
35. D. colletii Hook.f.
36. D. daunea Prain & Burkill
37. D. laurifolia Wallich ex Hook.f.
38. D. orbiculata Hook.f.
39. D. polystachya Turcz.
AN INVESTIGATION ON THE TAXONOMY AND ECOLOGY OF THE GENUS DIOSCOREA IN ARUNACHAL PRADESH, INDIA by *BHASKAR SAIKIA, J. S. RAWAT, HUI TAG AND ARUP KR. DAS- Journal of Frontline Research in Arts and Science Vol. 01 (2011) : 44-53, Research Paper
Dioscorea is monocotyledonous tuber crop of the family Dioscoreaceae and is reported to be an old crop species native to South East Asia. Its tubers have high nutritional value and were probably the main source of sustenance for the tribal people of Arunachal Pradesh. From the survey it has been found that the rural people of this region directly collect tubers from the wilderness resulting in rapid depletion of the different species of the important genus. Through this paper we are trying to highlight the taxonomic status, ecology and distribution of collected species. Using geographical information system technology, we created a map of different sites which indicated the elevation wise distribution of different species.
Dioscorea batatas Decne. is a synonym of Dioscorea polystachya
Dioscorea brandisii Prain & Burkill
Dioscorea daunea Prain & Burkill
Dioscorea lapsharum (? Dioscorea lepcharum Prain & Burkill)
Dioscorea polyphylla R.Knuth is a synonym of Dioscorea cumingii
Dioscorea wattii Prain & Burkill
The genus Dioscorea Linnaeus [Dioscoreaceae] in Assam, India by Nijara Goswami, S. K. Borthakur and D. K. Hore- Pleione 7(1): 73 – 83. 2013. ISSN: 0973-9467 © East Himalayan Society for Spermatophyte Taxonomy Abstract: There are about 600 species in the genus Dioscorea Linnaeus (Dioscoreaceae), distributed mainly in the tropical and sub-tropical regions of the world. The tubers, yams, constitute an important source of food in many tropical areas. These are rich sources of carbohydrate and essential dietary nutrients and thereby considered as an important crop of subsistence agriculture especially in tribal areas of north-eastern region of India. During last few decades the genus becomes one of the most important plants as source of diosgenin, a plant sapogenin, used for the synthesis of steroidal drugs. The present study provided baseline data on distribution of different species of Dioscorea in Assam which may help in finding out the species / varieties or races for agricultural planning and other related activities in the state.
Species detailed with keys:
Species with description & pictures in Flowers of India as on 18.5.14:
Indian Medicinal Plants: An Illustrated Dictionary edited by C.P. Khare (2007-
Dioscorea anguina is a synonym of Dioscorea pubera Blume
Dioscorea daemona is a synonym of Dioscorea hispida,
CRC World Dictionary of Medicinal and Poisonous Plants: Common Names … By Umberto Quattrocchi (2012)- Details-
Dioscorea wightii Hook.f.
Encyclopaedia of world medicinal plants, Volume 1 By T. Pullaiah (2006)- Details-
Dioscorea batatas Decne. is a synonym of Dioscorea polystachya
Medicinal Plants in Andhra Pradesh, India By T. Pullaiah (2002)- details-
Dioscorea floribunda M.Martens & Galeotti
Dioscorea prazeri ……………
Flora of Medak District, Andhra Pradesh, India By T. Pullaiah, Chintala Prabhakar, B. Ravi Prasad Rao (1998)- Details with keys–
Flora of Davanagere District, Karnataka, India By B. K. Manjunatha, V. Krishna, T. Pullaiah (2004- Description & illustrations of
Guide to Cultivated Plants By A. T. G. Elzebroek (2008) – Details-
Antidiabetic Plants in India and Herbal Based Antidiabetic Research By T. Pullaiah, K. Chandrasekhar Naidu(2003) – Details-
Dioscorea : 5 posts by 2 authors.
I have updated eFI (efloraofindia) page on Dioscorea
Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.
Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.
If someone can provide complete list of Indian species with source references it will be wonderful.
Any comments/ corrections are welcome.
I have added the list of Dioscorea species in India based on Karthikeyan et al. 1989.
Species mentioned in other litrature seems to match with your list.
However, a few others mentioned as below, in some other sources may be coultivated:
Dioscorea villosa L.
Dioscorea mexicana Scheidw. from CRC World Dictionary of Medicinal and Poisonous Plants: Common Names … By Umberto Quattrocchi (2012)
My Institute worked on Dioscorea floribunda and two varieties were released FbC-1 and Arka Upkar which was taken up by pharmma Industries like Wyeth for tuber-Diosgenin-16 DPA-Steroid prosduction. All are now part of History.
Yes … All three species mentioned by you seems New World species and may be found cultivated in India.
Anatomy of Dioscorea : 1 post by 1 author.
Our paper on the anatomy of Dioscoreas has now been published (online first).
Please check this link: http://link.springer.com/article/10.1007/s11418-014-0849-5
Paper published… : 12 posts by 9 authors.
Our paper on calcium oxalate crystals in Dioscorea has just been published.
Please check this link: http://link.springer.com/article/10.1007/s10265-014-0654-y
Good article. Calcium oxalate are important in pharmacognosy.
Congratulation … You have discovered new types of xtalls. Significant contribution to the science.
Dioscorea page with images of species in efloraofindia : 2 posts by 2 authors.
Pl. go through Dioscorea page with images of species (mostly done by Rawat ji) in efloraofindia.
If you find any mis-identification, pl. let us know.
If anybody can send images of other species of this genera (for incorporation in the website), it will be really nice. Also, if anybody is interested to take up the activity of inserting images on efloraofindia pages from efloraofindia posts, pl. let me know.
well. looks good