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Published In: Prodromus Florae Novae Hollandiae 294. 1810. (27 Mar 1810) (Prodr.) Name publication detailView in BotanicusView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/22/2009)

 

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DIOSCOREACEAE (Yam Family)

Eight genera, about 630 species, North America to South America, Asia, Africa, Pacific Islands, and Australia, most common in the tropics.

 

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1 Leaves mostly fiddle-shaped, with the basal lobes enlarged and deeply cordate and the tip acuminate; plants with elongate, vertical tubers, also producing aerial tubers in the leaf axils 1 Dioscorea oppositifolia
+ Leaves heart-shaped; plants with horizontal rhizomes, not producing axillary, aerial tubers (2)
2 (1) Lowermost leaves whorled; rhizomes 10–15 mm in diameter, contorted and with many knobs or short side-branches 2 Dioscorea quaternata
+ Lowermost leaves usually alternate, rarely opposite or whorled; rhizomes 5–10 mm in diameter, relatively straight, smooth and with few or no knobs or short side-branches 3 Dioscorea villosa
 

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