LEGUMINOS.E. (PEA FAMILY.) 45 



Flowers peduncled; corolla scarcely exceeding the calyx; leaves nearly 



sessile, 1-3-foliolate H. Purshiana. 6 



Flowers nearly sessile, not bracteate; corolla larger; leaves petioled, 3-5-foliolate; low. 



Calyx-teeth about equaling the tube, pod 5-seeded H. subpinnata. 7 



Teeth much longer than the tube; pod 2-4-s6eded H. Trachycarpa. 8 



3. Pod long -attenuate upward, incurved, pubescent; stipules gland-like; leaflets 3 to 7; 

 seeds 1 or 2; peduncles short or none; flowers and fruit reflexed. 



Somewhat woody; nearly smooth; stems angled; leaflets mostly 3, oblong to linear. 



Umbels sessile; teeth narrow, erect glabra. 9 



Peduncles short or nearly wanting; teeth usually recurved H. cytisoides. 10 



Peduncles shorter; teeth short and blunt H. juncea. 11 



Very silky-pubescent or tomentose; stems herbaceous: pod pubescent, short; umbels 

 on short peduncles. 



Very pubescent throughout; flowers 3 or 4 lines long H. tomentosa. 12 



Less pubescent; stem smooth; flowers smaller H. Heermannt 13 



1. H. stipularis, Benth. Rather tall, stout, two feet high or more, glandular; leaf- 

 lets 15 to 21, obovate oblong, acute and mucronate, a half to an inch long; stipules large 

 ovate; often fragrant. 



2. H. bicolor, Dougl. Smooth, erect and stout; leaflets 5 to 9, obovate or oblong, a 

 half to an inch long; stipules rather large; peduncles longer than the leaves, 3-7-flowered, 

 naked or sometimes with a small 1-3-foliolate bract at the summit; flowers nearly sessile 

 yellow, the wings often white; pod slender nearly 2 inches long. 



3. H. gracilis, Benth. Much like the last; usually low and slender, the weak stems 

 a span high or more; umbel with a petioled 1-3-foliolate bract; flowers yellow, keel and 

 Wings purplish. 



4. H. graudiflora, Benth. Stout, 1 to 5 ft. high, more or less appressed silky- 

 pubescent; leaflets 5 to 7 on an elongated rachis, 6 to 9 lines long; peduncles elongated; 

 umbel 3-8-flowered, usually subtended by a single leaflet; flowers nearly sessile, 6 to 11 

 lines long, yellowish or greenish white, often tinged with purple, pod slender, smooth. 



5. H. parviflora, Benth. Smooth or nearly so, stems slender, ascending, a span 

 high or less; leaflets 3 to 5, obovate and very small to narrowly oblong and 6 to 8 lines 

 long; bract 1-3-foliolate; flowers about 2 lines long, yellow. 



H. Purshiana, Benth. Silky-villous, rarely smooth, often a foot high or more; 

 leaflets varying from ovate to lanceolate, 3 to 9 lines long; peduncles usually exceeding 

 the leaves; the solitary flowers 2 or 3 lines long. 



7. H. subpinnata, Torr. & Gr. Villous or smooth, decumbent, a span high or less ; 

 leaflets half an inch long or less; flowers 3 or 4 lines long; pod linear oblong, about 

 5-seeded. 



