84 GERANIALES 
Plants prostrate. 6. E. albicaulis. 
Plants erect or ascending. 
Appendages of the glands conspicuous, white. 
1. E. petaloidea. 
Appendages of the glands greenish-white or obsolete, 
2. E. flagelliformis. 
Leaves broader mostly less than 1 cm. long. 
Seeds smooth. 
Leaves oblong, 4-12 mm. long. 3. E. geyeri. 
Leaves orbicular, ovate or oval, 2-6 mm. long. 
4, E. serpens. 
Seeds wrinkled. 10. E. fendleri. 
Leaves serrate or dentate. 
Glabrous or nearly so. 
Plants prostrate or spreading, leaves 4-15 mm. long, 
Seeds strongly transversely wrinkled. 7. E. glyptosperma. 
Seeds pitted or irregularly and faintly wrinkled. 
5. E. serpyllifolia. 
Plants erect or ascending, leaves 10-30 mm. long. 
11. E. nutans. 
Puberulent or pilose. : : 
Involucres entire, seeds 0.4 mm. long, 8. E. maculata. 
Involucres split on one side, seeds 1 mm. long. 
9, E. humistrata. 
Leaves equilateral, the bases not oblique, 
Herbage glabrous, stems striate angled. 12. E, hexagona. 
Herbage pubescent. 
Leaves linear or linear-lanceolate, 15, E. cuphosperma. 
Leaves broader. 16. E. dentata. 
Leaves, at least some of them, alternate or scattered; plants erect or 
ascending. 
Stems topped by an umbel, which is subtended by a whorl of verti- 
cillate leaves, leaves sessile or nearly so. 
Leaves entire. 
Upper leaves white margined. 14. E. marginata. 
Upper leaves not white margined. 
Leaves over 2 cm. long. 13. E. corollata. 
Leaves mostly less than 2 cm, long, the lower scaly. 
Rays of the umbel 3-5, subtended by few bracts. 
21. E. robusta. 
Rays of the umbel many, subtended by many bracts. 
20. E. cyparissias. 
Leaves serrulate, 
Styles erect, longer than the ovary, 2-cleft to the middle. 
18. E. obtusata. 
Styles spreading, shorter than the ovary, slightly 2-cleft. 
. 19. E. missouriensis. 
Stems not topped by an umbel, no verticillate leaves, leaves slender 
petioled. 
Leaves linear or linear-lanceolate. 15. E. cuphosperma. 
Leaves broader. 
