Chap. V. 



DENDROBIUM CHEYSANTHUM. 



139 



substance. The large concave but shallow stigmatic 

 surface is seated beneath the rostellum. The pro- 

 duced anterior lip of the anther (see A) almost entirely 

 covers the upper surface of the rostellum. The fila- 



Fig. 21. 



DeNDEOBHJM CHRYSASraHUM. 



anther. s. stigma. 



rostellum. I. labellum. 

 n. nectary. 

 . Lateral view of flower, with the 

 anther in its proper position, 

 before thp, ejection of the pol- 

 linia. All the sepals and petals 

 are removed^ except the label- 

 lum, which is longitudinally 

 bisected. 



B. Outline of column, viewed later- 



ally, after the anther has ejected 

 the pollinia. 



C. Front view of column, showing 



the empty cells of the anther, 

 after it has ejected its pollinia. 

 The anther is represented hang- 

 ing too low down, and covering 

 more of the stigma than it 

 really does. 



ment of the anther is of considerable length, but is 

 hidden in the side view., A, behind the middle of the 

 anther; in the section, B, it is seen, after it has 

 sprung forward : it is elastic, and presses the anther 

 firmly down on the inclined surface of the clinan- 



