134 



LEGUMINOS^. Jlomckia. 



Anmmb, low : flowers smaller. , „ , , 



Uiuliels '2-5-llowi!ii;<l : sttiiulanl rciiioto from tlic wings : leaflets 5. 10. 11. maiiitima. 

 Flowers mo.slly solitary : ]iutaU uiii.io.\iiiiiuo; keel obtuse ; stiuuliinl 



ulti'.mmlo hclow : Icullots U to 1). H- H- sti!1.;(.ma. 

 Klowors very siimll, soliliiry : k>nl lu-ulo : Mmlt) of tlui Htiuitliml cor- 



(Ulu : KiiillolH :Uo () : imii 5-7-Hcmlca : uuiirly glul.roiiH. VI. II. i-auvikioua. 



* ♦ I'otl shortly iicut(s 'i - T-seoiliHl, strai<'lit : flowers small, mostly solitary : keel narrowed into 



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



Flowers peduncled : corolla scarcely e.xceeding the calyx : leaves nearly 



sessile, 1 - 3-foliolatc. 13. H. PtiUSHlANA. 



Flowei-s nearly sessile, not bracteate : corolla longer : leaves i)etiolcd, 

 3 -5-foliolate : low. 

 Calyx-teeth about wiuailing the tube : j.od (i to 9 lines long, 5-seeded. 14. II. suui'INNATA. 

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



♦ ♦ » Pod long-attenuate upward, subterete, incurved, imbescent : stipules gland-like : leaflets 3 



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



Glabrous or simringly juibcscent : jxkI slightly pubescent, elongated and 

 much cxserted lH;yond the calyx : calyx-teeth much shorter than 

 the tube. 

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



Leaflets oljlong to linear : umbels sessile ; tci-th narrow, erect. 16. II. oi.abka. 



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



attenuate, usually recurved. 17. H. cytisoides. 



Leaflets obovuto 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 : llowei-s 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 tomeutose : stems herbaceous, terete : pod pulies- 

 cent, shorter. 

 Pubescence appressed. 



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

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

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

 teeth nearly eipndlmg 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. Heehmanm. 



§ 1. Pod acute above, linear, straight or nearli/ so, terete or somewhat compressed, 

 manij- (5 - •2Q-)seeded, glabrous except in H. rigida : seeds mostly compressed, 

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

 ing or erect. — Euhosackia, Benth. 



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

 chis : umbels pedunculate, few - many-flnivered : flowers rather targe : j>trmnials. 



+- 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, ohovale-oblonj,', acute, nearly half an inch long; stipules ovate: [)e(luncle3 

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

 late : calyx 3 lines long ; the subulate teeth half the length of the tube. — Tacif. R. 

 Eep. iv. 79, t. 4. 



On dry hills near South Yuba, Bigeloio. 



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

 villous with spreading liairs, glandidar, tlie leaves smoother: leaflets usually 15 to 21, 



