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
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 brandisii Prain & Burkill
Dioscorea daunea Prain & Burkill
Dioscorea lapsharum (? Dioscorea lepcharum Prain & Burkill)
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 &
Indian Medicinal Plants: An Illustrated Dictionary edited by C.P. Khare (2007-
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-
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-
Dioscorea bulbifera ………..
Antidiabetic Plants in India and Herbal Based Antidiabetic Research By T. Pullaiah, K. Chandrasekhar Naidu(2003) – Details-
Dioscorea bulbifera ………..
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 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).
Application of anatomy and HPTLC in characterizing … by V Raman – 2014
Application of anatomy and HPTLC in characterizing species of Dioscorea (Dioscoreaceae) by Raman V, Galal AM, Avula B, Sagi S, Smillie TJ, Khan IA
Paper published… : 12 posts by 9 authors.
Our paper on calcium oxalate crystals in Dioscorea has just been published.
Good article. Calcium oxalate are important in pharmacognosy.
Congratulation … You have discovered new types of xtalls. Significant contribution to the science.
New and unusual forms of calcium oxalate raphide crystals in the plant kingdom by Vijayasankar Raman, Harry T. Horner, Ikhlas A. Khan- Journal of Plant Research August 2014-
Abstract– Calcium oxalate crystals in higher plants occur in five major forms namely raphides, styloids, prisms, druses and crystal sand. The form, shape and occurrence of calcium oxalate crystals in plants are species- and tissue-specific, hence the presence or absence of a particular type of crystal can be used as a taxonomic character. So far, four different types of needle-like raphide crystals have been reported in plants. The present work describes two new and unusual forms of raphide crystals from the tubers of Dioscorea polystachya—six-sided needles with pointed ends (Type V) and four-sided needles with beveled ends (Type VI). Both of these new types of needles are distinct from the other four types by each having a surrounding membrane that envelopes a bundle of 10–20 closely packed thin crystalline sheets. The previously known four types of needles have solid or homogenous crystalline material, surrounded by a membrane or lamellate sheath called a crystal chamber. Only the Type VI crystals have beveled ends and the needles of the other five types have pointed ends
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