138 LEGUMINOS^E. Eosackia. 



1 7. H. cytisoides, Benth. Kesenibling the last : calyx-teeth attenuate, mostly 

 recurved : peduncles equalling or exceeding the leaves, or sometimes very short, 

 usually with a 1 - 3-foliolate bract at the top. — Trans. Linn. Soc. xvii. 366. 



From near San Francisco to Monterey and southward ; Salinas Valley, Antisell. 



18. H. juncea, Benth. 1. c. Very nearly glabrous, somewhat shrubby, erect: 

 leaflets obovate to oblong, 2 to 4 lines long : umbels on very short peduncles or 

 sessile : flowers about 3 lines long : calyx 2 lines long or less ; teeth short and blunt. 



Monterey to San Diego (Douglas, Nuttall, Brewer, Goodale) ; Colorado Desert (Schott) ; and 

 reported also from near San Francisco. 



-i- +- Herbaceous and sparingly pubescent : stems terete : leaflets usually 5 to 7, and 



less approximate. 



19. H. prostrata, Xutt. Slightly appressed-silky : stems very slender, diffuse, 

 2 or 3 feet long : leaflets cuneate-oblong to obovate, 2 or 3 lines long, acutish : um- 

 bels on slender peduncles, often a half to an inch long, naked or with a 1- 3-foliolate 

 bract : flowers two or three lines long : style glabrous : calyx a line long ; its teeth 

 short, triangular, acute. — Torr. & Gray, PL i. 325. H. decumbens, var. glabriuscula, 

 Hook. & Arn. Bot. Beechey, 137. 



Santa Barbara and San Diego, near the sea, Nuttall, Palmer, &c. 



20. H. micrantha, Nutt. " Diffusely procumbent from an apparently annual 

 root," very slender: leaflets obovate-oblong, 1-J- to 3 lines long: umbels on very 

 short naked peduncles : flowers very small (not two lines long) : style covered with 

 short straight ascending hairs : calyx-teeth short, acute. — Torr. & Gray, PL i. 324. 



Monterey (Nuttall) ; Catalina Island, Gambel probably. No good specimens of this apparently 

 good species have been collected. 



* * Very silky-pubescent or tomentose, herbaceous : stems terete : body of the pod less 

 elongated, often scarcely longer than the ccdyx, pubescent, usually much curved : seed 

 often solitary, somewhat curved : leaflets 3 to 7, not approximate. 



+■ Pubescence oppressed. 



21. H. sericea, Benth. L c. Densely white-silky, much branched, ascending, a 

 foot or two high : leaflets usually 3, cuneate-oblong to linear, 3 to 6 lines long : 

 umbels loosely few-flowered, sessile or often on short peduncles : flowers three lines 

 long : calyx half as long, with short slender teeth. 



Eare : collected by Douglas, probably at Monterey, and in Salinas Valley by Brewer. 



22. H. argophylla, Gray. More or less densely silky, often silvery : stems 

 decumbent or ascending : leaflets usually 5 or 7, from obovate and rounded to 

 oblong and acute at both ends, 2 to 7 lines long : umbels mostly dense and capitate, 

 on short simply bracted peduncles, sometimes nearly equalling the leaves : flowers 4 

 or 5 lines long : calyx half as long ; its teeth conspicuous, filiform and silky, usually 

 nearly equalling the tube. — PL Thurb. 316. H. argentea, Kellogg, Proc. Calif. 

 Acad. iii. 38, fig. 8. 



In the foot-hills of the Sierra Nevada from the Merced River (Gray) southward, and through 

 the southern part of the State ; Guadalupe Island, Palmer. Variable in pubescence, length of 

 calyx-teeth, &c. 



23. H. decumbens, Benth. 1. c. Yillous-pubescent and somewhat tomentose, 

 perennial : stems ascending or diffusely procumbent, a foot long or more : leaflets 5 

 to 7, cuneate-obovate to -oblong, mostly acute, 3 to 6 lines long : umbels less dense, 

 on short peduncles, with a 1 - 3-foliolate bract : flowers 4 or 5 lines long : calyx less 

 silky ; its teeth slender, often as long as the campanulate tube. 



Var. (?) Nevadensis, Watson. Low and apparently annual : flowers somewhat 

 smaller : calyx-teeth half as long as the tube. — H. Heermanni, Anderson, Cat. PL 

 Nevada, 119 ; Watson, Bot. King Pxp. 63, in part. 



