558 FABACEAE 



pubescent and glandular; leaflets 3-13, usually oblong, 5-10 mm. long, the terminal narrower 

 and longer; spikes head-like, 1-2 cm. long, densely flowered; calyx densely short-villous, and 

 sprinkled with glands, 6-8 mm. long, the teeth subulate, equaling the tube ; corolla violet-purple, 

 little exceeding the calyx ; pod 3 mm. long, dotted with glands. 



Gravelly and sandy soils, Lower Sonoran Zone; Colorado Desert, California, to western Arizona, Lower 

 California, and western Sonora. Type locality: on the desert tablelands of the Gila River, Arizona. Dec-July. 



5. Dalea polyadenia Torr. Nevada Indigo-bush. Fig. 2764. 



Dalea polyadenia Torr. Bot. King Expl. 64. pi. 9. 1871. 

 Parosela polyadenia Heller, Cat. N. Amer. PI. ed. 2. 6. 1900. 



Intricately branching shrub, 3-15 dm. high, the branches divaricate, spine-tipped, canescent 

 with short downwardly appressed pubescence, thickly dotted with conspicuous flat amber-colored 

 glands. Leaves pinnate, 1-2 cm. long; leaflets 5-11, obovate, 2-4 mm. long, canescent on both 

 surfaces, and glandular-dotted beneath; spikes subcapitate; calyx 4 mm. long, the tube promi- 

 nently 10-nerved, canescent and glandular-dotted, the teeth subulate, scarcely equaling the tube ; 

 corolla rose-colored or purple, 5-6 mm. long ; pod 3-5 mm. long, pubescent above. 



Desert regions, Upper Sonoran Zone; Inyo County, California, to Nevada. Type locality: "Borders of the 

 Truckee Desert, Nevada." May-Sept. 



Dalea polyadenia var. subnuda S. Wats. Bot. Calif. 2: 441. 1880. Leaves and branches glabrous or 

 nearly so; calyx glandular-dotted, the teeth villous-ciliate. Owens Valley, California. 



6. Dalea arborescens Torr. Mojave Indigo-bush. Fig. 2765. 



Dalea arborescens Torr. ex A. Gray, Mem. Amer. Acad. II. 5: 315. 18SS. 

 Parosela arborescens Heller, Cat. N. Amer. PI. ed. 2. 5. 1900. 

 Parosela neglecta Parish, Bot. Gaz. 55: 306. 1913. 



Much branched shrub, 1-1.5 m. high, the branches rigid and somewhat spinescent, the 

 branchlets hoary-tomentose and bearing scattered slender bristle-like yellowish glands. Leaves 

 pinnate, 15-25 mm. long, hoary-tomentose; leaflets 5-7, rarely 3, mostly obovate, 5-8 mm. long, 

 obscurely glandular; racemes 2.5-5 cm. long; calyx 6-8 mm. long, prominently 10-ribbed, 

 villous-tomentose, obscurely glandular, the teeth lanceolate-subulate, equaling the tube ; corolla 

 blue, 10-12 mm. long ; ovary densely silky-villous with concealed punctate glands. 



Lower Sonoran Zone; apparently a local species of the Barstow and Daggett regions of the Mojave Desert, 

 California. April-May. 



7. Dalea californica S. Wats. California Indigo-bush. Fig. 2766. 



Dalea californica S. Wats. Proc. Amer. Acad. 11: 132. 1876. 



Parosela californica Vail, Bull. Torrey Club 24: 17. 1897. 



Parosela californica var. simplifolia Parish, Bot. Gaz. 55: "!09. 1913. 



Rigidly much branched shrub, the branches silky-pubescent and very sparsely beset with 

 short prickle-like glands, in age becoming glabrous and often subspinescent. Leaves densely 

 silky-pubescent, pinnate; leaflets 5-7, rarely 3, linear-lanceolate, 6-12 mm. long, the glands ob- 

 scured by the silky pubescence ; racemes 8-15 cm. long ; calyx 5 mm. long, thinly silky, and very 

 minutely glandular-dotted, the teeth shorter than the tube ; corolla bright blue-purple, 8 mm. 

 long ; pod 8 mm. long, thinly silky, without glands. 



Desert washes, Lower Sonoran Zone; Colorado Desert and the San Jacinto Valley, California, to Arizona 

 and southern Utah. Type locality: edge of the Colorado Desert, east of Banning, California. May-June. 



8. Dalea Fremontii var. Johnsonii (S. Wats.) Munz. Johnson's Indigo-bush. 



Fig. 2767. 



Dalea Johnsonii S. Wats. Bot. King Expl. 64. 1871. 

 Parosela Johnsonii Vail, Bull. Torrey Club 24: 17. 1897. 

 Dalea Fremontii var. Johnsonii Munz, Man. S. Calif. 262. 1935. 



Shrub 1-2 m. high, the older branches becoming glabrous, the young twigs sparsely silky- 

 pubescent, and very scantily or not at all beset with prickle-like glands. Leaves pinnate, the 

 rachis slender, not winged, 2-3 cm. long; leaflets linear, usually narrowly so, 6-15 mm. long, 

 sparsely silky-pubescent and dotted with small rounded glands, distinctly narrowed at base and 

 more or less petiolulate ; racemes about 3 cm. long ; calyx 7 mm. long, sparsely strigose and 

 dotted with rather inconspicuous rounded glands, the teeth lanceolate, about equaling the tube, 

 more or less recurved; corolla bright blue-purple, 8 mm. long; pod 8-12 mm. long, covered with 

 yellowish glands. 



Desert regions, Lower Sonoran Zone; Providence Mountains, California, to southern Utah. Type locality: 

 "Near St. George on the Virgin River, Utah." April-June. 



Dalea Fremontii var. Saundersii (Parish) Munz, Man. S. Calif. 262, 598. 1935. Branchlets and leaves 

 with a sparse pubescence of spreading hairs, the former beset with prickle-like yellowish glands. Mojave Desert, 

 Inyo and San Bernardino Counties, California. 



9. Dalea Schottii Torr. Schott's Indigo-bush. Fig. 2768. 



Dalea Schottii Torr. Bot. Mex. Bound. 53. 1859. 

 Parosela Schottii Heller, Cat. N. Amer. PI. ed. 2. 6. 1900. 



Much branched somewhat spinescent shrub, 1-3 m. high, the older branches smooth and 

 pallid, the young branchlets pale green and glabrous, usually divaricate. Leaves simple, very 



