75 



face is absent. Probably these appendages are the lateral stigmas 

 (see diagram i). These two cases are to be compared with C. . 

 flaccida as described l)y Masters, in which the two stamens 

 nearest to the labellum, have developed into labella. 



Spathoglottis plicata Bl. jL dlb. 



Habitat Java etc. 



Coll. May 1895. 



Flower tetramerous, ovary with 8, closer in pairs, grooves. 

 At first sight the sepals are normal and three in number, they 

 also occupy the same position relatively to one another, the 

 two lateral So and S3 however with their bases a little more 

 apart than ordinarily. On closer examination there appears 

 between So and S3 a fourth sepal not quite as In-oad as the 

 two. Between Sj and Sj there is a petal, an other between Sj 

 and S3, both of them being normal. Besides ^ 



there are two (normal) labella. Column a little 

 shortened, at the middle of its front runs a 

 slightly prominent ridge {;v) upwards which 

 a little way under the stigma bears a pro- 

 jecting membranous little branch of 2 mM. 

 Anther, pollinia and rostellum normal, at the 

 lower side of the stigma is an appendage {ij) 

 bent upwards (Fig. 26 — 28). 



Dendrohium mutabile Lndl. 



Habitat Java. 



Coll. February 1895. 



Eight flowers of the same raceme show the reversion of the 

 stamens a^ and a"^ ^) and this in such a way that in six of the 

 cases both can be distinguished with perfect certainty, whereas 

 in the other two flowers this is certain only for one of them. 



The extra-stamens are less perfect than the ordinary anther, 

 for as the latter bears two pollinia in each of its cavities, a^ 



1 ) This diagram has been taken from Masters (Veg. Terat.) and is referred to in 

 indicating the position of the different parts of the flower whether or not normally- 

 having developed. 



2) In using the letters a', a' and so on we also refer to the diagram of Masters. 



