14t> LEGUMINOS^E. Dalea. 



2. D. calycosa, Gray. Herbaceous from a biennial or perhaps sometimes per- 

 ennial root, canescent with a silky puberulence, diffuse and decumbent, slender, 

 about 6 inches high : leaflets 5 to 1 3 pairs, oblong-obovate, a line or two long, ob- 

 tuse, glabrous above : flowers 3 lines long, in short loose spikes : peduncles slender : 

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

 shorter than the purple and white petals. PI. Wright, i. 40. 



On the San Pedro, S. Arizona ( Thurber) ; entrance of the Great Canon of the Tantillas Mts., be- 

 low San Diego, Palmer. 



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

 leaflets 6 to 10 pairs, obovate to oblong, a line or two long, obtuse : flowers 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 smooth. Gray, Proc. Am. Acad. vii. 397. 

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



Gravelly hills near Fort Mohave (Cooper) ; also on the Colorado in W. Arizona, near the mouth 

 of Bill Williams River. 



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

 leaflets 7 to 9 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 (Thurber) ; Chihuahua (Wislizenus) ; New Mexico, Wright. 



2. More or less woody and shrubby : claivs of the petals adnate to the stamen-tube 

 only at the very base : ovules 2, rarely 4 or 6 : flowers spreading or reflexed, 

 mostly in loose spikes or racemes. XYLODALEA, Watson. 



* Calyx very pubescent ; its teeth slender. 



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

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

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

 pedunculate : flowers 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. 

 Eep. v. 360, t. 11. 



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



5. D. arborescens, Torr. " A small tree," much branched, somewhat spinose, 

 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 equalling the tube. Gray, PL 

 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, about equalling the tube, shorter 

 than the corolla : pod scarcely exceeding the calyx, pubescent. Watson, Bot. King 

 Exp. 64, t. 9. 



In Truckee and Carson Deserts, Northwestern Nevada, 



* * Calyx slightly pubescent ; its teeth broad, 

 -t- Leaves pinnate : flowers in loose spikes. 



7. D. Californica, Watson. Shrubby, canescent with a fine appressed pubes- 

 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 



