Many of the " Dioscorea " species that originate from the yam family grow in countries that have tropical and subtropical climates.
22.
Later the Mexican barbasco trade focused instead on " Dioscorea composita " instead, as this variety has a higher diosgenin content.
23.
Pematang means the sand embankment between the marsh and the Gadung is the name of the plant ( " Dioscorea hispida " ).
24.
Further lactone formation gives another side product, dumetorine, which is an alkaloid that can be isolated from " Dioscorea dumetorum ".
25.
The emergent tuber ( caudex ) of this remarkable species ( Dioscorea elephantipes ) can grow 3 feet in diameter and weigh more than 700 pounds.
26.
Wild yam ( " Dioscorea villosa " ) extract creams are not effective since the natural progesterone present in the extract is not bioavailable.
27.
""'Dioscorea villosa " "'is a species of a twining tuberous vine that is native to eastern North America.
28.
This was however disproved by partial degradation results leading researchers to speculate that nicotinic acid served as precursor to dioscorine in " Dioscorea Hispida ".
29.
The closely related genus " Tamus " is included in " Dioscorea " by some sources, but is maintained as distinct by others.
30.
Described as new to science in 1955, it was first isolated from tubers of Chinese yam ( " Dioscorea batatas " ) found in Japan.
