NATURAL 8CIENCE8 OF PHILADELPHIA. 34-7 



decumbent, snffruticose, apparently dwarfed, less smooth form of the above 

 species, which probably varies a good deal, according to situation and season, 



3. H. cytisoides, Benth. 1. c. (Drepanolobus cytisoides and D. rubescens, 

 Nutt. 1. c.) Suffruticose, minutely silky-pubescent on the young parts, or soon 

 glabrate, decumbent or sarmentose ; with obovate, oblong, or linear-oblong 

 obtuse leaflets, and many-flowered umbels, on a peduncle which often con- 

 siderably exceeds the leaf, but is sometimes very short ; the calyx-teeth 

 about half the length of the tube, subulate aristiform and recurved ! Califor- 

 nia, near San Francisco and Monterey. 



* * Suffiutescent or nearly herbaceous, diffusely decumbent, silvery white 

 with appressed silky pubescence or tomemtum, the branches somewhat 

 virgate. 



4. H. sericea, Benth. Silky-canescent, much branched, ascending. Leaves 

 mostly trifoliolate and subsessile ; leaflets oblong-linear, or the larger ones 

 spatulate-oblong. Umbels subsessile and few-flowered. Teeth of the calyx 

 short or minute, in original specimens from Douglas about one-third the 

 length of the turbinate campanulate tube ; in those recently collected by Dr, 

 Brewer (Geol. Survey of California), very short. Flowers small, 3 lines 

 long, yellow : the incurved apex of the keel somewhat acute. California ; 

 rare. 



5. H. argophylla, Gray, PI. Thurb. p. 316. H. artjrntea, Kellogg, in Pro- 

 ceed. Calif. Acad. 7, p. 38, fig. 8 ? Densely silky-tomentose, the long and 

 rather simple branches decumbent. Leaves 3 5-foliate ; leaflets obovate, 

 obtuse (3 6 lines long). Umbels 8 12-flowered and with a unifoliolate 

 bract, capitate ; the peduncle short, sometimes very short, occasionally longer 

 than the leaf. Teeth of the calyx slender, about half the length of the cylin- 

 draceous tube. Flowers 4 or 5 lines long, yellow, occasionally turning red- 

 dish ; the broad incurved apex of the keel obtuse. Southern and interior 

 part of California ; Thurber, Bigelow, Wallace, Newberry, &c. The specimen 

 from Mr. Wallace has peduncles of considerable length. 



Var. ? Fjremonti. Leaflets obovate-oblong and acute ; the flowers 5 lines 

 long ; the teeth of the calyx setaceous and almost as long as the tube. 

 Eastern side of the Sierra Nevada. The length of the calyx-teeth varies con- 

 siderably in species of Hosackia. 



Iff Herbaceous, or scarcely suffrutescent at the base, pubescent, tomentose, 

 or glabrate, diffusely procumbent or prostrate. Leaflets 3 5, sometimes 6 or 

 7, not thick, not silvery-white ; the petiole or rhachis not abbreviated. 



f Teeth of the villous calyx slender. Plants silky or tomentose-pubescent. 

 Seminiferous part of the legume short, little longer than the calyx, canescent- 



6. H. tomentosa, Hook & Am. Bot. Beech., p. 137, and certainly of p 

 332. Syrmatium tomentosum, Vogel, 1. c. Loosely tomentose-villous with 

 whitish or fulvous spreading hairs. Leaflets obovate, 4 7 lines long. Um- 

 bels capitate, 6 12-flowered, and with a unifoliolate bract ; the peduncle some- 

 times hardly any, sometimes nearly equalling the leaf. Teeth of the very 

 Yillous calyx setaceous subulate, fully the length of the turbinate-campanu- 

 late tube. Flowers 3 to 4 lines long, mostly turning reddish ; the keel very 

 obtuse. California, San Francisco to Santa Barbara. 



7. H. decumbens, Benth. Silky with appressed pubescence ; stems decum- 

 bent from a lignescent root or caudex, rather rigid. Leaflets cuneate-obovatt, 

 rhombic-ovate or obovate-oblong, cinereous, 4 or 5 lines long. Umbels capi- 

 tate, many-flowered, and with a 13 foliolate bract ; the peduncle distinct, 

 but seldom equalling the leaf. Teeth of the silky-downy calyx equalling or 

 shorter than the campanulate tube. Flowers nearly 5 lines long, apparently 



1863.] 



