80 



NEW YORK STATE MUSEUM 



Figure X 



Showy Ladies' -tresses 



(I b i d i u ni c e r n u u m (Linnaeus) House) 



a spike, 4 to 5 inches long 

 and one-half to two-thirds of 

 an inch thick; flowers spread- 

 mg or nodding, each about 

 live-twelfths of an inch long in 

 three rows ; lip oblong or ovate, 

 roinided at the apex, crenulate 

 or crisped on the margin. 

 Flowering in late summer and 

 autumn. 



Another common species 

 of Ladies'-tresscs is I b i d i u m 

 s t r i c t u m ( Rydberg) House, 

 l^erhaps only a race of I b i d - 

 ium romanzof f ianum, 

 which has the sepals and 

 ]X'tals coherent and connivent 

 into a hood. It is common in 

 l)Ogs and swamps during July 

 and August. 



Southern Twayblade 



iOplirys (lustnilis (Lindley) 



House) 

 (Listcra aiistnilis Lindley) 



Figure XI 



Tlie Twayblades are 

 lUK-ing the smallest of our 

 11 itive orchids and recjuire 

 luirp eyes to detect them 

 among the recesses of the 

 forest or bogs. The Southern 

 Twayblade is about 5 to 10 

 inches tall, with tw^o ovate, 

 rather pointed, smooth and 

 shining sessile leaves slightly 

 above the middle of the stem 



