242 LEGUMINOS.lv Uuhu. 



2. D. calycosa, Oiay. Ileibaceons from a biennial or perhaps sonietinies per- 

 ennial rout, cauescent \\\i\\ a silky puberulence, tlilluse and decuiubent, slender, 

 about G inches liigh : leatlets 5 to \\\ pairs, ublong-ubovate, a line or two long, ob- 

 tuse, glabrous above : llowers 3 lines long, in short loose spikes : peduneles slender : 

 bracts linear : calyx silky ; its teotli narrowly lanceolate, longer than the tube, a little 

 shorter than the purple ami white {letals. — I'l; Wrigiit. i. 10. 



On the San Pedro, S. Arizona {Thurbcr) ; entrance of the Great Canon of the Tantillas Mis., be- 

 low San Diego, Palmer. 



3. D. Panyi, Torr. & Gray. Herbaceous, very slender, puberulent or glabrate : 

 leallets G to lU pairs, obovate to oblong, a line or two long, obtuse : llowers 4 lines 

 long, bright purple, in loose elongated long-peduncled spikes : calyx not half the 

 length of the corolla, canescent with short silky hairs ; its teeth broadly ovate, 

 acute, about equalling the tube: pod suiooth. — Gray, Proc. Am. Acad. vii. 397. 

 D. divaricata, var. clntrta, Gray, 1. c. 335. 



Gravelly hills near Fort Moln'.ve {Cooper) ; also on the Colorado in W. Arizona, near the mouth 

 of bill Williams liiver. 



D. WisLiZENi, Gray. Somewhat woody at base, erect, slender, a foot high, silky-villous : 

 leaflets 7 to i) pairs, oblong, obtusish, 2 or 3 lines long : spikes short, rather dense : flowers rose- 

 colored, 4 lines long, showy, twice longer than the slender very villous calyx-teeth. — Santa Cruz, 

 S. Arizona {Tharbcr) ; Chihuahua {iVidizcims) ; New Mexico, Wriijht. 



§ 2. More or less woodi/ ond shrubhi/ : claws of the petals aduate to the stamen-tube 

 onli/ at the very base: ovules 2, rareli/ 4 or G : jlowers spreadiaj or rejlexed, 

 mostly in loose spikes or racemes. — Xylodalea, Watson. 

 * Calyx very pubescent ; its teeth slender. 



4. D. Emoryi, Gray. Shrubby, much branched, 2 to 5 feet high, hoary-toraen- 

 tose throughout with a very line pubescence : leaflets 1 to 3 pairs, narrowly oblong 

 to obovate, 2 to 4 lines long, tiio terminal leaflet much longer : spikes very short, 

 pedunculate : llowers 2 or 3 lines long, purple : calyx-teeth as long as the tube, a 

 little shorter than the corolla : ovary pubescent. — PI. Thurb. 315 ; Torr. Pacif. R. 

 Kep. v. 3G0, t. 11. 



In sandy soils on the Colorado and Gila ; desert east of San Bernardino, Parry. 



5. D. arborescens, 'J'orr. " A small tree," much branched, somewhat si^inose, 

 the younger branches, leaves, and calyx densely hoary-tomentose : leaflets 1 to 3 

 pairs, obovate, approximate, 2 or 3 lines long : flowers in short nearly sessile rather 

 close spikes, purple, 4 or 5 lines long : calyx large, but shorter than the corolla, the 

 broader oblong or narrowly lanceolate teeth nearly equallijig the tube. — Gray, PI. 

 Thurb. 316. 



Collected only by Fremont at the eastern base of the San Fernando Mountains. 



6. D. polyadenia, Torr. A stout divaricately branched shrub, 2 to 5 feet high, 

 somewhat spinose, canescent with a fine retrorse pubescence, and sprinkled with 

 numerous reddish glands ; the leaflets more hairy and the calyx densely villous : 

 leaflets 3 to 6 pairs, obovate, a line or two long : flowers in short nearly sessile 

 spikes, violet, 3 lines long : calyx-teeth narrow, alxjut equalling the tube, slnater 

 than the corolla: pod scarcely exceeding tiie calyx, pubescent. — Watson, liot. King 

 Exp. G4, t. 9. 



In Truckeo and Carson Deserts, Northwestern Nevada. 



* * Calyx slightly pubescent ; its teeth broad. 

 +- Leaves pinnate : Jlowers in loose spikes. 



7. D. Californica, Watson. Shrubby, canescent with a line appressed })ubes- 

 cence, sparingly glandular; the glands upon the peduncles sometimes prominent 

 and prickle like : leaflets 1 or 2 pairs, decurrent upon the rhachis, 1 to 1 ^ lines 



