APPENDIX. 433 



1. H. JUNCBA, Benth. Erect, 'broom-like ; leaflets obovate, oval or oblong ; umbels sbort-peduncled, 

 few-flowered ; calyx-teeth very short obtuse. 



2. H. SCOPAEIA, Nutt. Nearly glabrous, erect aud 2-8° high, or sometimes decumbent, broom-like ; 

 leaflets Unear-oblong or oblong ; umbels sessile, usually crowded on the branchlets ; calyx-teeth subu- 

 late, acute, the narrow tube 2-4 times longer. 



3. H. CYTisoiDBS, Benth. Subshrubby, decumbent or sarmentose, silky-pubernlent or glabrate; 

 leaflets obovate, oblong or linear-oblong, obtuse ; umbels many-flowered, peduncled ; calyx-teeth subu- 

 late-awned, recurved, about half as long as the tube. 



* * More or less woody at base, difli'usely decumbent, branches somewhat virgate, white with a 

 silvery appressed silky pubescence. 



4. H. SBRICEA, Benth. Silky-canesoent, much branched, ascending ; leaves subsessile ; leaflets 

 mostly 3, oblong-linear or spatulate-oblong ; calyx-teeth short or minute ; flowers 3" long, yellow, the 

 incurved keel subacute. California. 



5. H. ARGOPHYIXA, Gray. Densely tomentose ; branches long, subsimple, decumbent ; leaflets 3-5, 

 obovate, 3-6" long ; umbels 8-12-flowered, capitate, short-pedunoled, with a simple bract ; calyx-teeth 

 slender, the cylindrical tube about twice longer ; flowers 4-5" long, yellow ; keel obtuse. See page 62. 



* * * Herbaceous or nearly so, diffusely procumbent or prostrate, pubescent, tomentose, or glabrate ; 

 leaflets 3-5, sometimes 6 or 7, not thick nor silvery white, the petiole or rachis not abbreviated. 



(a.) Calyx villous, teeth slender ; silky or tomentose-pubescent ; legume canescent, the fruiting part 

 little exceeding the calyx. 



6. H. T0MENT08A, H. & A. Tomeutose-viUous with whitish or fulvous spreading hairs ; leaflets 

 obovate, 4-7" long; umbels 6-12-flowered, capitate, short-pedunoled, bract simple; calyx-teeth setaceous- 

 subulate, as long as the turbinate-campanulate tube; flowers 3-4" long; the keel very obtuse. — Cali- 

 fornia. 



7. H. DECUMBBNS, Benth. Decumbent from a woody caudex ; silky pubescence appressed ; leaflets 

 4-5" long, cuneate-obovate, rhombic-ovate or obovate-oblong, cinereous ; umbels many-flowered, capi- 

 tate, short-peduucled, bract 1-3-foliolate ; calyx silky-downy, teeth subequaling the campanulate tube ; 

 flowers 5" long, yellow, keel acutish. — Oregon and Washington Territory. 



8. H. Heermanni, Dur. & Hilg. Villous-pubescent, much-branched, very leafy ; leaflets 2-5" long, 

 obovate, roundish or oval-oblong ; umbels 4-9- flowered, bract simple, peduncle often ecLualing the leaf; 

 calyx loosely villous, teeth shorter than the campanulate tube ; flowers 2" long, keel very obtuse. See 

 page 63. 



(6.) Minutely pubescent, glabrate, diffusely procumbent ; calyx-teeth short ; seeded portions of the 

 legume exserted beyond the calyx. California. 



9. H. MiCRANTHA, Nutt. Annual (1), slender, minutely villous ; leaflets 5-6, obovate-oblong, lJ-3" 

 long ; umbels 3-5-flowered, bractless, short-pednncled ; flowers li" long, keel obtusish. 



10. H. PROSTRATA, Nutt. Silky-puberulent and glabrate, slender; leaflets 5-7, oblong-obovate, 

 obtuse, 3" long; umbels lax, 5-10-flowered, on slender peduncles, bract simple; calyx campanulate, 

 teeth very short ; flowers 3" long. 



§ 2. EUHOSACKIA, Benth. Legume linear, straight or nearly so, not rostrately attenuate ; keel not 

 falcately-attenuate, mostly very obtuse. 



* Leaflets 3-6, crowded-pinnate or quasi-palmate; stipules glandular; peduncles l-2-(rarely 3-4-) 

 flowered ; bract simple, rarely 3-foliolate ; flowers yellow, claws not exserted, the vexillum hardly 

 nnguiculate, not apart, keel very short, rather straight and narrow. Perennial ; stems branch- 

 ing, rigid. 



(a.) Peduncles aU exceeding the leaves. 



11. H. RiGiDA, Benth. Silky or hoary-pubescent, 8-12" high ; leaflets 3-5, crowded, cuneate-oblong 

 or obovate ; calyx-teeth shorter than the tube.— Southern California to New Mexico. 



12. H. PUBERUlA, Benth. Appressed-puberulent; leaflets 3-6, less crowded, linear, lanceolate, or 

 the lowest oblong ; calyx-teeth attenuate, equaling the tube. See page 419. 



(6.) Peduncles short, rarely equaling the leaf, sometimes wanting. 



13. H. 'Wriqhtii, Gray. Ashy-puberulent, bushy-branched, very leafy; leaflets 3-5, apparently 

 palmate and sessile, the lowest oblong, the rest filiform-linear ; calyx-teeth setaceous-subulate, about 

 equaling the tube ; flowers rather large.— New Mexico. Eunning into the last. 



* * Leaves pinnate, leaflets 5-21 ; umbels few- many-flowered, peduncled, bracts 1-5-foliolate or 

 wanting ; vexUlum with a slender claw, more or less apart. Boot perennial, except in S. maritima. 



55 



