STANDLEY—TROPICAL AMERICAN PHANEROGAMS. 177 
by the natives of various parts of tropical America as a hypnotic. 
Because of the characteristic narcotic properties the crushed stems of 
the plants are sometimes thrown into water to stupefy fish. 
KEY TO THE SPECIES. 
Standard petal very broad, oval or flabelliform. 
Standard long-clawed; leaflets rounded or very obtuse at the apex. Tree, 
armed with stout spines; corolla orange or salmon___------ 1. E, glauca. 
Standard not clawed; leaflets acutish to acuminate at the apex. 
Calyx truncate. Tree, armed with small spines_-_------- 2. E. darienensis. 
Calyx bilobate. Shrub, armed with spines; seeds brown, large. 
3. E. breviflora. 
Standard petal narrow, linear to linear-oblong. 
Fruit and ovary aculeate. Plants herbaceous. 
Calyx dentate ~ou- tee 4, E. setosa. 
Calyx cleft on one side at the apex, not dentate. Seeds very large, nearly 
black _-_-_--___-__--_-------------- ~ooa === 5. E. leptorhiza. 
Fruit and ovary not aculeate. 
Calyx cleft on one side at the apex, or conspicuously bilobate. 
Calyx cleft on one side at the apex. 
Pods coiled; leaflets ovate or ovate-oblong. Shrub; seeds ‘scarlet. 
6. E. cochleata. 
Pods straight or nearly so; leaflets mostly deltoid. Large or small 
tree; flowers pink_--------------------------- 7. E. rubrinervia. 
Calyx bilobate. 
Leaflets ovate or lance-ovate; petioles aculeate. Small tree; flowers 
green and red _----------------.--------------- 8. E. lanceolata. 
Leaflets suborbicular or deltoid; petioles usually unarmed, 
Venation of the leaflets prominently reticulate; leaflets tomentulose 
beneath when young; pods only slightly constricted between the 
seeds -- - - 9. E. montana. 
Venation of the leaflets not prominently reticulate; leaflets serice- 
ous beneath when young; pods deeply and abruptly constricted 
between the seeds_-------- _10. E. costaricensis, 
Calyx truncate. 
Standard densely lanate or tomentulose. Shrubs or small trees. 
Seeds about 8 mm. long; standard 7 cm. long; pods deeply constricted 
between the seeds_-_- Woe eee eee eee 11. E. lanata. 
Seeds about 12 mm. long; standard 5 to 5.5 cm. long; pods shallowly 
constricted between the seeds_---.----------- 12. E. occidentalis. 
Standard glabrous or nearly so. 
Leaflets, at least the terminal ones, conspicuously lobate. Shrubs or 
herbs; seeds scarlet; flowers red - __18. E. herbacea. 
Leaflets never lobate. 
Seeds about 15 mm. long; leaflets usually rounded or very obtuse 
at the apex__---------- - 14. E. flabelliformis. 
Seeds about 10 mm. long; leaflets usually acute or acuminate at the 
apex. 
Standard 8 cm. long; pods deeply constricted between the seeds; 
leaflets aculeate beneath___-.----.--------- 15. E. goldmanii. 
Standard 6.5 cm. long or shorter; pods only slightly constricted 
between the seeds; leaflets not aculeate__--16. E. americana. 
