ORCHIDACE.E 



**Labellum fringed, but not tripartite (here hy- 

 brids may be looked for) 

 Flowers yellow 



Spur 5-9 mm. long 25. H. cristata 



Spur 2-2.5 cm. long 26. H. ciliar'is 



Flowers white 27. H. blephariglottis 



var. conspicua 

 ***Labellum fringed, tripartite (here hybrids may 

 be looked for) 

 Flowers greenish or whitish 



Petals entire or obscurely crenulate 28. H. lacera 

 Petals toothed or crenate 29. H. leucophcea 



Flowers pale or deep magenta 



30. H. psycodes 



31. H.Jimbriata 

 ^32. H. peramcena 



II. Plants essentially tropical or subtropical. Stigmatic processes 

 well developed, conspicuous.^ Petals often bipartite. Labellum 

 usually broken up into three linear divisions. The majority of 

 the species are Mexican and West Indian. 



* Labellum clearly tripartite, the divisions filiform or linear 



•j" Petals bipartite, the posterior division broader than the anterior one 



IF Leaves basal 



33. H. distans 



34. H.jamakensis 



35. H. Tiirckheimii 



HH Leaves not essentially basal, usually with 

 parallel sides, oblong to linear, clearly 

 longer than broad 



Flowers few, not more than 4, rarely 5 



36. H. setifera 



37. H. mesodactyla 

 Flowers comparatively numerous, more 



than 4 



'•Cf. plate of Habenaria quinqueseta. 



[ ni 



