434 BOTANY. 



(a.) Peduncles 1-4-flowered, elongated; pedicels very short; stipules scarious, small ; flowers yello-w, 

 claws a little exserted, keel broad and very obtuse. 



14. H. LATHYROIDES, Dur. & Hilg. Low, ashy-puberulent ; leaflets 5-7, not crowded, linear-lanceo- 

 late, acute at both ends ; bract simple or wanting ; calyx-teeth broad-subulate, shorter than the tube. — 

 California. 



15. H. ANGtJSTirOLiA, G. Don. Slender; leaflets 5-9, obovate or linear, short, often canescent 

 beneath; peduncle 1-2-flowered, bract 3-foliolate ; calyx-teeth slender, nearly equaling the tube. — Mexico. 



(J.) Peduncles umbellately many-flowered, mostly shorter than the leaf, bracteate only below the 

 apex ; stipules scarious or foliaceous ; flowers rather small, greenish-white or yellowish, keel 

 slightly curved, very obtuse, a. little shorter than the wings ; calyx-teeth not half as long as the 

 tube ; leaflets 9-21, oval or oblong. 



16. H. incana; Torr. Low, very hoary-villous ; bract mostly 5-foliolate, near the umbel. — California. 



17. H. STiPTjLARis, Benth. Eather tall and stout, villous above, leaflets glabrate ; stipules foliaceous, 

 the upper sometimes nearly scarious ; bracteal-leaf much below the umbel, 3-9-foliolate. — California. 



18. H. CKASSIFOLIA, Benth. ^ Tall and stout, stems nearly glabrous ; leaflets 9-15, thickish, puberulent 

 or glabrate ; bract mostly 3-foliolate and above the middle of the peduncle ; calyx-teeth very short. — 

 Oregon and California. 



(c.) Umbels 4-12- (or the lowest 1-3-) flowered, on peduncles usually equaling or exceeding the 

 leaves ; bract at the top or none ; stipules scarious ; flowers i' long or more, yellow with white or 

 purple, the keel abruptly incurved, acutish, nearly equaling the wings ; calyx-teeth at least nearly 

 half as long as the tube ; leaflets 5-11. 



19. H. OBLONGiPOLiA, Benth. Appressed-pubesceat ; leaflets 9-11, narrowly oblong ; bract simple ; 

 calyx-teeth a little shorter than the tube ; otherwise like the next. — California. 



20. H. BICOLOE, Dongl. Glabrous, rather tall; leaflets 5-9, obovate or oblong, bract none or rarely 

 small, simple ; calyx-teeth about half as long as the tube ; keel often white. — Oregon and California. 



21. H. GRACILIS, Benth. Glabrous, more slender, 8-12' high, weak and spreading ; stipules large ; 

 leaflets 5-7, often 3 below, obovate-cuneate ; bract 3-foliolate, petioled ; calyx-teeth nearly equaling the 

 tube ; keel and wings purplish. — California. 



{d.) Peduncles several- (or the lowest 1-3-) flowered; bract at the apex, 1-3-follolate, or none; 

 stipules glandular, often deciduous ; claws slightly, if at all, exserted ; keel straightish, dilated 

 above ; legumes glabrous ; leaflets 5-7. — California. 



22. H. GKA]srDii?LORA, Benth. Usually tall, 1-5° high, more or less soft-pubescent ; leaflets oval or 

 oblong ; peduncles elongated ; flowers 7-11" long, yellowish or greenish-white and purplish ; calyx-teeth 

 subulate, about equaling the tube or shorter ; keel very much shorter than the ample wings. 



23. H. MARITIMA, Nutt. Annual, diffusely spreading, strigose-puberuleut or nearly glabrous ; stems 

 8-12' long ; leaflets mostly 5, on a somewhat dilated rachis, succulent, oval or obovate, 4-6" long ; pedun- 

 cles about equaling the leaves, 3-5-flowered ; calyx-teeth linear-subulate, rather exceeding the tube ; 

 flowers 4-5" long, bright-yellow, keel broad, about equaling the wings. 



* * * Leaves pinnate, rachis more or less dilated; stipules glandular; peduncles 1- (rarely 2-) 

 flowered; claws not exserted, that of the vexillum short, approximate to the others. Small 

 diffuse annuals ; flowers small, yellow. 



24. H. STRiGOSA, Nutt. Strigosely pubescent, diffusely spreading or ascending ; leaflets 4-9, linear- 

 oblong or obovate, 1-5" long; peduncles equaling or exceeding the leaves, the bract at the apex 1-5-foli- 

 olate or wanting ; flowers 2-5" long, keel broad, nearly straight, very obtuse, much shorter than the 

 wings, vexiUum tapering into a short claw.— California. 



25. H. PAEViixoRA, Benth. Glabrous, pale; leaflets 3-6; peduncles 2-8" long; bracts 1-3-foliolate ; 

 flowers barely 2" long, keel narrow and inflexed above, acutish, nearly equaling the wings ; vexillum 

 subcordate. — Oregon, California. 



J 3. MICEOLOTUS, Benth. Legume as in § 2, sometimes barely oblong; keel attenuated upward, 

 falcate, mostly acute, equaling or exceeding the wings ; claws not exserted, that of the vexillum 

 short, not apart. Annual; leaflets 1-5, the lower scattered, rachis more or less dilated; stipules 

 glandular ; flowers small, yellow, not umbellate. 



(a.) Peduncles exceeding the leaves, 1-flowered, with a simple bract ; leaves subsessile, pinnately 

 3-foliolate or sometimes simple above ; calyx-teeth much exceeding the tube, nearly equaling the 

 corolla. 



26. H. PuESHiANA, Benth. Variable. See page 63. 



(J.) Flowers subsessile and mostly solitary in the axils, braotless ; corolla exceeding the calyx ; leaf- 



