THE LESSER BUITERFLY 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 {llabenaria bi/oliu, U. lir.). 



Enlarged. 



br. The bract, in the axil of which the flower arises ; or, the twisted ovarv ; 

 *;), the long spur of the labelluni ; /, the labcUura ; e, entrance to the 

 spur ; 5^ the stigma ; a, the anther. 



2. A Pollinium. Much enlarged. 



p, The pollinium proper ; s, the stiilk ; il, the disc. 



spreading. The Up (labeHum) — that is, the third 

 member of the inner series — is directed forwards, anil 

 forms a platform upon which the insect aliglits. In 

 many Orchids tliis Hj) is very different in form and 

 colour from the otlier jieriaiith scgiiK'Hts, and hceonics 

 the most conspicuous portion of the whole flower. 



