Classification of Plants 205 



Schizodium is similar to Disa., but the sharp angles at 

 the nodes will tell this genus. Petals narrow, 2-lobed at the 

 tip, or twisted, and often eared at base. The lip is another 

 distinguishing feature. It is as long as the sepals, narrowed 

 above the base and often pointed, or the tip may be broad and 

 waved, marking the lip into three distinct parts — a lower, upper, 

 and middle. 



Fig. 205. — Disa inelabetica. 



Disperis, Pterygodium, and Ceretandra are nearly 

 allied genera with the differences given in the key. In Disperis 

 and Ceretandra the lip is clawed. Pterygodium has a sessile 

 lip, and, like that of Disperis, it is often bent back over the 

 column into the helmet. 



Habenaria is a large genus found chiefly in the East. It 

 may be recognized by the long spur of the three-parted lip 

 and the usually 2-parted petals. The Up is sometimes entire. 



