65 



Labelliim. In the Prof. David variety five cases of douljling 

 have been observed. 



The same thing in a variety only designated as ^hybrida". 



A flower known as M™" Crozy has no labelUnn, whereas 



A specimen of Antoine Borton has two hibella. 



In a ,,Prof. David" the labellum is found replaced by a stamen. 



Alae. We have several times observed three alae in those 

 varieties which as a rule have only two : a, ft and y. 



Only a is present. 



a shows an appendage. 



One of the alae twolobed. 



Two alae where in ordinary cases there are three. 



M™^ Crozy. Of the three alae there are two with a lateral lobe. 



Only one ala present. 



Stamen. M™<' Crozy : stamen with deep incision at top (about 

 I of the whole length), the anther being implanted at the base 

 of the incision. Going downwards the incision becomes a ridge 

 which gradually broadens to a petaloid appendage. 



Another specimen of the same variety. Two normal stamens. 

 No labellum. 



Antoine Borton. No stamen. Two labella. 



One of the tw^o flowers of a synanthy shows a stamen of 

 which the petaloid portion is incised at top. 



C. hybrid a. Stamen altogether petaloid (fig. 7)' Observed twice. 

 » » » » „ (fig. 8) with two peta- 



loid appendages at the base. 



C. hybrida. Stamen completely filiform, but with only one 

 anther-cell, so that the petaloid half is wanting. 



C. hybrida. The petaloid portion of the stamen firmly adheres 

 to the (enlarged) style. 



Pistil. Only the style is referred to, as the ovary does not 

 seem to be liable to deviations. 



Style filiform i. e. without petaloid portion (observed five times). 



Two styles grown together at the base, both of them three- 

 winged. 



Ann. Jard. bot. Buitenz. 2e Ser. Vol. IV. 5 



