The Guiana Orchids. 293 



36. Angraecum. — The native species are inconspicuous, 

 and may be recognised by their close spikes of small 

 flowers, with spurs Two species : — 



1, A. fasciola ... Stems leafy branching, flowers white. 



2. A. filiforme ... Plant reduced to a bunch of aerial roots, 



flowers yellow. 



37. Macradenia. — The only species is an inconspicuous 

 plant with pseudo-balbs, and small flowers borne on a 



drooping raceme. 



I. M. triandra ... Flowers greenish, spotted. 



38. Notylia.— Rather pretty little plants with very 

 small, almost obsolete pseudo-bulbs, and short thick 

 leaves from amongst which hang drooping flower-stems 

 bearing a great number of small flowers. Four species : — 



1. N. punctata ... Flowers whitish, spotted. 



2. N. micrantha ... Flowers pale green. 



3. N. tenuis ... Flowers yellow. 



4. N. Parkeri 



Tribe 3. — Neottiece. 



1. Vanilla. — This genus is easily recognised by its 

 climbing habit, fleshy stems and thick leaves. The 

 flowers are borne in clusters and are of a fair size, but 

 usually dull in colour. Four species : — 



1. V. bicolor. ... Flowers dull red. 



2. V. planifolia ... Flowers yellowish green, lip white. 



3. V. anaromatica ... Flowers greenish white. 



4. V. palmarum ... A dwarf species found on the eta palm. 



2. Sobralia. — Large semi-terrestrial plants with hard 

 wiry stems and bamboo-like foliage. The flowers are 

 generally large and handsome, but last only a very short 

 time. Three species; — 



1. S. liliastrnm ... Stems 8 to 12 feet high, flowers rosy. 



2. S. sessilis ... Stems 4 to 6 feet, flowers deep rose. 



3. S. stenophylla 



3. Epistephium. — The only species found in Guiana 



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