iV£0TT7£^— CEPHALANTHERA 47 



Flowers similar to 4, but with lip of Epipactis; column rather short; stigma 

 orbicular; rostellum truncate above, rounded below; pollinia built up of 

 pollen-packets. Physurinae 



Goodyera. 



Flowers small, white, sweet-scented, trumpet-shaped, horizontal, spirally arranged ; 

 column horizontal; stigma orbicular; rostellum nib-shaped; pollinia flat, 

 attached to a linear dark-coloured viscidium. Spiranthinse 



Spiranthes. 



Flowers green; rostellum small, tongue-like, with parallel cells charged with 

 liquid cement at high tension. Listerinse 



LisUra, Neottia. 



Sub-tribe CEPHALANTHERIN^ 



Genus II CEPHALANTHERA Richard 



Column long, with a tapering point (filament) behind, to which the anther is fixed 

 below the middle of the back. Stigma on front of column just below the anther, 

 transversely oblong. Rostellum absent. Pollinia slender, nearly or wholly split 

 into two, without caudicles, pollen-grains not united in tetrads, single. Flowers 

 large, sessile, erect, white or rose. Lip jointed, basal half (hypochile) erect, parallel 

 with column and embracing it by two rounded lobes (making the flower tubular), 

 concave at base; forward half (epichile) turned down at the tip like a spout, with 

 3-5 parallel yellow crests. 



Cephalanthera Richard, Mem. Mus. Paris, iv, 51 (1818). Serapias L., Sp. pi. 

 ed. I (1753), which also included Epipactis and the present genus of the 

 Ophrydeffi Serapias. Epipactis Crantz (1769) {Cephalanthera + Epipactis). 



KEY TO THE SPECIES OF CEPHALANTHERA 



1. Flowers large, bright rose. Leaves distant, oblong, spreading, C. rubra 



2. Flowers smaller, pure white. Leaves alternate in two opposite ranks, long, narrow, 



sword-shaped. C. ensifolia 



3. Flowers large, creamy white, opening but httle. Leaves broad, ovate-lanceolate, 



distant. C. grandiflora 



