ដំឡូងទៀន (Dioscorea polystachya)

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ដំឡូងទៀន in Khmer. (Dioscorea polystachya) commonly called Chinese yam / Wild Yam. Commonly mistaken for Nagaimo/ Japanese Mountain yam. 
In my experienced in forage of food crops from the wild in Cambodia, I've encountered two different varieties that have the characteristics, in terms of tubers, outer skin, texture of flesh, twisted wing vines, and habitat. The only difference between the two that I recalled is that one variety produce a much smaller tubers than the other. Locally called  "Dum-Loang Ty'Inn" for the smaller tubers variety.  And  "Dum-Loang Jr'owe" for the variety  that produce 2-3ft long tubers. 
As for the specifications of the their names, I'm  unsure of which one is which. Because there's no information found online that noted the difference between the two species. All I've found seemed to be written about the larger variety. 
  • A perennial, an indingenouse food crop, and it is native to  Cambodia.
  • Commonly found growing in sandy soil in an undisturbed forestry and mountain. 
  • Cordate leaves with prominent contoured  along the rib and veins.
  • It's a slender climbing  vine with a cylindrical tuber penetrate deep into soil. 











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