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Dioscorea is a genus of over 600 species of flowering plants in the family Dioscoreaceae, native throughout the tropical and warm temperate regions of the world. The vast majority of the species are tropical, with only a few species extending into temperate climates.
The best-known member of the family is the yam (some species of Dioscorea). The APG system (1998) and APG II system (2003) both place it in the order Dioscoreales , in the clade monocots . However, the circumscription changed in the APG II system, with the 2003 system expanded to include the plants that in the 1998 system were treated in the ...
Dioscorea deltoidea, the Nepal yam, is a species of flowering plant in the family Dioscoreaceae. Its native range is the Himalayas through to south-central China and mainland Southeast Asia. Its native range is the Himalayas through to south-central China and mainland Southeast Asia.
For the early history from Lindley (1853) [7] onwards, see Caddick et al. (2000) Table 1, [8] Caddick et al. (2002a) Table 1 [5] and Table 2 in Bouman (1995). [9] The taxonomic classification of Dioscoreales has been complicated by the presence of a number of morphological features reminiscent of the dicotyledons , leading some authors to place ...
Dioscorea strydomiana is shrub-like, grows up to 1 metre (3 ft 3 in) tall with an above ground tuber that is large and rough-textured, the thick bark resembling the tortoise-shell-like bark of Dioscorea elephantipes [3] It has herbaceous stems from the upper part of the tuber each year, and then they die back over the course of the dry season.
Dioscorea quartiniana is a climbing tuber geophyte in the family Dioscoreaceae. [2] It is native to Benin, Botswana, Burundi, Chad, Congo, Côte d'Ivoire (Ivory Coast
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Dioscorea chouardii is related to the yam and grows from a tuber hidden in the rock fissure. From this it sends out a shoot each year which withers away in the autumn. The shoot leaves a scar on the tuber, which makes it possible to estimate the age of the plant from the number of scars; the oldest plants are calculated to have lived for three hundred years, and may be contenders for being the ...