The Guiana Orchids. 



295 



g. Pogonia. — ^This genus contains the most showy 

 terrestrial orchids found in Guiana, including species 

 formerly called Cleistes, the flowers of which are as 

 handsome as some of the Cattleyas. The flowers are 

 borne on the top of leafy stems, two or three together. 

 Four species : — 



... Flowers bright rose, large. 



... Flowers yellow, large. 



... Flowers rosy, about half an inch across. 



1 . P. rosea 



2. P. lutea 



3. P. Surinamensis 



4. P. parviflora. 



Tribe 4. — Ophrydece. 



I. Habenaria. — Terrestrial plants, distributed all over 

 the world, with underground tubers and leafy stems, 

 bearing spikes of greenish white or white flowers on the 

 top ; lip with a spur, which is very long in some species. 

 Mostly inconspicuous but some of them are rather' pretty 

 when in flower. Nine species : — 



I. H. longicauda 



2. H. seticauda 



3. H. Schomburgkii 



4. H. heptadaftyla 



5. H. Demerarensis 



6. H. pauci flora 



7. H. macilenta 



8. H. parviflora 



9. H, Moritzii 



,. Lip divided into three segments, spur 



very long. 

 .. Lip incurved, spur very long, pointed. 

 „ Lip divided, spur short. 

 .. Flowers few, spur short. 

 .. Flowers small, spur short. 

 .. Lip divided, spur short. 

 .. Lip divided, spur club-shaped. 

 .. Flowers very small. 

 ,.. Lip divided, spur short. 

 Tribe s. — Cypripediece. 



I Selenipedium. — This genus is allied to the well- 

 known " Lady's slipper," of which so many species are 

 in cultivation. The species are terrestrial, having 

 fibrous roots, and leaves either clustered or borne on long 

 wiry stems. The floral lip is always more or less pouch- 

 like resembling the front of a shoe, from which the name 

 is derived. Four species :■ — 



PP 2 



