ORCHIDEAE 



409 



Freyhold frequently observed the presence of supernumerary stamens, sometimes 

 belonging to the inner, and sometimes to the outer staminal whorl. 



Fig. 378. Epipoguni aphyllum, Sw. (after P. Rohrbach). (i) Flower, seen from the front. (2) Do., 

 from the side, after removal of the helmet Insects creep down on the line between spur and labellum 

 (x 4J). (3) Longitudinal section of a flower. The ovules have been removed from the ovary. The 

 ridge at the base of the spur is cut through. Vascular bundles are indicated by dotted lines (x 5). 

 (4) Column and ovary of an open flower. (5) Do., in longitudinal section. (6) Do., after removal of 



the anther (x 10). a, anther; ap, tip of do.; c, caudicle; cl, clinandrum; /, labellum; w, nectary; 

 py petal ; pi, placenta ; po, poUinium ; r, retinaculum ; s, sepal ; st, stigma ; i, conducting tissue ; x, true 

 nectary. 



825. Cephalanthera Rich. 



2633. C. pallens Rich. (= C. grandiflora 6". F. Gray) 

 p. 80; Kirchner, 'Flora v. Stuttgart,' p. 174 



(Darwin, op. cit., 

 Ridley, J. Linn. See. Bot, London, 



