Joseph Decaisne, 1854
||Green - White - Yellow
Shan-Yam, Chinese Yam
Dioscorea polystachya Turcz. 1837.
This member of the Dioscoreaceae
family was described by Joseph Decaisne in 1854. Found originates from China, but
have been spread around
the world as a crop. The long caudex will grow well in a well-drained
soil, given some water and lots of sun. It can get up to 60 cm in
diameter, the vines can reach six meters. The flowers are
The leaves are close to D. mexicana, but the caudex are much longer and
it get these "air-bulbs".
Dioscorea is named after
Pedianos Dioscorides, a Greek physician if the 1st century A.D. The
species name for the 'air-potatoes'.
It can stand
temperatures down to -18 C.