HARDY IRISES. 



467 



I. vircscens, creamy-white with a greenish cast, falls slightly marked ; 

 these are plants of 6 to 9 inches in height (fig. 146). 



Several Irises collected from differing South France, Riviera, Italy, 

 and Greece stations seem to belong here as geographical varieties. 



Fig. 146. — Iris virescens biflora in Switzerland. (Gaparne.) 



I. biflora is good in its several forms, has a longer season of blooming, 

 a tendency to fork low down within the tuft of leaves and throw two 

 stems as well as two flowers to a spathe. This quality appears in several 



