134 LEGUMINOS^E. Hosackia. 



Annuals, low : flowers smaller. 



Umbels 2 - 5-flowered : standard remote from the wings : leaflets 5. 10. H. MARITIMA. 



Flowers mostly solitary : petals approximate ; keel obtuse ; standard 



attenuate below : leaflets 5 to 9. 11. H. STRIGOSA. 



Flowers very small, solitary : keel acute : blade of the standard cor- 

 date : leaflets 3 to 5 : pod 5-7-seeded : nearly glabrous. 12. H. PARVIFLORA. 



* * Pod shortly acute, 3 - 7-seeded, straight : flowers small, mostly solitary : keel narrowed into 



an acute beak : stipules gland-like : annuals, more or less villous. 



Flowers peduncled : corolla scarcely exceeding the calyx : leaves nearly 



sessile, 1 - 3-foliolate. 13. H. PURSHIANA. 



Flowers nearly sessile, not bracteate : corolla longer : leaves petioled, 



3 - 5-foliolate : low. 



Calyx-teeth about equalling the tube : pod 6 to 9 lines long, 5-seeded. 14. H. SUBPINNATA. 

 Teeth much longer than the tube : pod 3 to 4 lines long, 2 - 4-seeded. 15. H. BRACHYCARPA. 



* * * Pod long-attenuate upward, subterete, incurved, pubescent : stipules gland-like : leaflets 3 



to 7 : seeds 1 or 2, terete : peduncles short or none : flowers and fruit reflexed. 



Glabrous or sparingly pubescent : pod slightly pubescent, elongated and 

 much exserted beyond the calyx : calyx-teeth much shorter than 

 the tube. 

 Somewhat woody : nearly glabrous : stems angled : leaflets mostly 3. 



Leaflets oblong to linear : umbels sessile : teeth narrow, erect. 16. H. GLABRA. 



Leaflets oblong to linear : peduncles short or nearly wanting : teeth 



attenuate, usually recurved. 17. H. CYTISOIDES. 



Leaflets obovate to oblong : peduncles very short : teeth short and 



blunt. 18. H. JUNCEA. 



Herbaceous, sparingly pubescent : stems very slender, terete : leaflets 



usually 5 to 7 : calyx-teeth short. 



Peduncles slender : flowers 2 or 3 lines long : style glabrous. 19. H. PROSTRATA. 



Peduncles very short : flowers very small : style pubescent. 20. H. MICRANTHA. 



Very silky-pubescent or tomentose : stems herbaceous, terete : pod pubes- 

 cent, shorter. 

 Pubescence appressed. 



Densely white-silky : leaflets mostly 3, narrow : umbels loosely few- 

 flowered, often sessile : flowers 3 lines long : calyx-teeth short. 21. H. SERICEA. 

 Leaflets 5 to 7 : umbels peduncled : flowers usually larger : calyx- 

 teeth nearly equalling the tube. 



More or less silky : umbels close, capitate : calyx very silky. 22. H. ARGOPHYLLA. 



Villous and subtomentose : umbels less dense : calyx less hairy. 23. H. DECUMBENS. 

 Pubescence more or less spreading : pod very short : umbels mostly 

 on short peduncles : leaflets 5 to 7 : calyx-teeth filiform, equal- 

 ling the tube. 



Very pubescent throughout : flowers 3 or 4 lines long. 24. H. TOMENTOSA. 



Less pubescent ; stem glabrous : flowers smaller. 25. H. HEERMANNI. 



1. Pod acute above, linear, straight or nearly so, terete or somewhat compressed, 

 many- (5 - 20-)seeded, glabrous except in H. rigida : seeds mostly compressed, 

 suborbicnlar : keel broad above, mostly very obtuse : flowers and fruit ascend- 

 ing or erect. EUHOSACKIA, Benth. 



* Stipules scarious or foliaceous: leaflets 5 to 21, upon a more or less elongated rha- 

 chis : umbels pedunculate, few many-flowered : flowers rather large : perennials. 



*- Stipules broad and foliaceous : bract of several leaflets, below the top of the. peduncle. 



1. H. incana, Ton. Low, stout, erect, densely silky-villous throughout : leaflets 

 9 15, obovate-oblong, acute, nearly half an inch long; stipules ovate : peduncles 

 shorter than the leaf (half an inch long), 6 9-flowered : bract near the top, 5-folio- 

 late : calyx 3 lines long ; the subulate teeth half the length of the tube. Pacif. E. 

 Eep. iv. 79, t. 4. 



On dry hills near South Yuba, Bigelow. 



2. H. stipularis, Benth. Rather tall, stout, two feet high or more, less densely 

 villous with spreading hairs, glandular, the leaves smoother: leaflets usually 15 to 21, 



