THE LESSER BUTITIRFLY ORCHID 



137 



calyx and corolla, but consists of a perianth of three 

 outer, and three inner, floral leaves. Of the former, 

 one is directed upwards, and two of the inner series 

 lie just inside it. The other perianth members are 



br 



Fio. XI. 



1. The Flower of the Lesser Butterfly Orchid {Habenaria bi/olia, R. Br.). 



Enlarged. 



br. The bract, in the axil of which the flower arises ; ov, the twisted ovary ; 

 ap, the long spur of the labellum ; I, the labeUum ; e, entrance to the 

 spur ; St, the stigma ; a, the anther. 



2. A Pollinium. Much enlarged. 



p. The pollinium proper ; «, the stalk ; d, the disc. 



spreading. The lip (labellum) — that is, the third 

 member of the inner series — is directed forwards, and 

 forms a platform upon which the insect alights. In 

 many Orchids this lip is very different in form and 

 colour from the other perianth segments, and becomes 

 the most conspicuous portion of the whole flower. 



