The Guiana Orchids. 289 



23. Eriopsis — A single species with thin ribbed leaves 

 on the top of a fleshy oblong stem ; flowers spike from 

 the base, long: — 



I. E. Schomburgkii ... Flowers orange. 



24. Trichocentrum. — A genus of small plants with 

 comparatively large flowers, very neat and pretty. The 

 pseudo-bulbs are almost obsolete, the leaves thick, and 

 the nodding flowers provided with spurs at the back. 

 Two species : — 



1. T. iridifoliura ... Flowers yellow. 



2. T. recurvum ... Flowers white, lip purple. 



25. Rodriguezia. — Small plants with handsome flowers 

 borne on stems proceeding from below small pseudo- 

 bulbs which bear thick leathery leaves. The first species 

 has a one-sided spike of small deep rose-coloured 

 flowers, while the others, formerly placed in a genus 

 called Burlingtonia, bear fewer but much larger white 

 flowers : — 



1. R. secunda ... Flowers deep rose. 



2. R. Candida ... Flowers waxy white with a tinge of pale 



yellow down the centre of the lip. 



3. R. fragrans ... Similar to the last but larger and more 



fragrant. 



4. R. venusta ... Flowers white tinged with pink. 



26. Aspasia.— One species, a plant with two-edged 

 pseudo-bulbs, from below which rise flower-stems bearing 

 two or three not very conspicuous flowers. 



I. A. variegata ... Flowersgreenish, lip white, violet-spotted. 



27. Odontoglossum. — A genus well-known among 

 orchid growers, and which unfortunately is sparsely 

 represented here, the most handsome species being only 

 found on mountains. They are charaaerised by having 

 two or more tooth-like warts at the base of the lip, and 



