334 



LEOUMINOSAE 



leaves simple, linear, V2 to 1^/4 inches lonj::; flowers blue in loose racemes 1 to 4 

 inches long; calyx yellowish, subglabrato or pnborulent, 2Y> to 3 lines long, ob- 

 scurely glandular, its teeth low-triangular or shortly acute, ciliate-margined; 

 corolla 4 to 5 lines long; banner obcordate; wings broadly oblong; keel-petals 

 semi-orbicular with a strongly auricular lobe at base; ovary and style pubescent; 

 ovules 2, collateral; pods obliquel}' elliptic, 4 to 6 lines long, conspicuously marked 

 with red glands, containing a single large seed. 



Dry gravelly mesas, 100 to 500 feet : Colorado Desert. South to Lower Cali- 

 fornia. Apr. 



L0C8. — Ft. Yuma, Lemmon; Chuckwalla Mt. ; Shaver Canon, Jepson; Painted Can»n, n. of 

 Mecca, Jepson 11,688 ; Coral Reef Canon, Santa Rosa Mts., Clary 12 ; Thousand Palms Canon 



near Indio, Jepson 6040 ; Palm Springs of Saa Jacinto, 

 Schellenberg ; Silent Canon, se. end Santa Rosa Mts., 

 Jepson 11,704; Borrego Valley, w. side, Jepson 8819; 

 Yaqui Well, e. San Diego Co., Jepson 12,521 ; Wagon 

 Wash near Sentenac Canon, Jepson 8950, 12,465 ; Valle- 

 cito, e. San Diego Co., Jepson 8557. The four last- 

 cited collections represent something of intergrades to 

 the var. puberula Parish. 



Var. puberula Parish. Herbage densely white- 

 pubescent, only tardily subglabrate ; calyx canescent. — 

 West side of Colorado Desert : Meyers Creek bridge, sw. 

 Imperial Co., Jepson 11,770. 



Refs. — Parosela schottii Hel. Cat. N. Am. PI., 

 ed. 2, 6 (1900); Jepson, Man. 557 (1925). Dalea 

 schottii Torr. Bot. Mex. Bound. 53 (1859), type loc. 

 "banks of the Colorado," Schott. Psorodendron schottii 

 Eydb. N. Am. Fl. 24:44 (1919). Var. puberula 

 Parish, Bot. Gaz. 55:312 (1913), type loc. w. Colorado 

 Desert, T. Brandegee. Psorodendron puberulum Eydb. 

 N.Am. Fl. 24:45 (1919). 



5. P. emoryi Hel. White Dalea. (Fig. 

 204.) Densely and divaricately branched 

 shrub 1 to 4 feet high, white with a close felt- 

 like tomentum, commonly sprinkled with red 

 glands; leaves % to 1^/2 inches long, pinnate 

 with 5 to 7 leaflets, sometimes 3 or reduced to 

 1 ; leaflets obovate, 2 to 6 lines long, or the ter- 

 minal leaflet linear or oblong, commonly much 

 longer than the lateral, that is, 6 to 11 lines 

 long; spikes very dense, capitate to oblong, l^ to % inches long; calyx 2i/^ to 3 

 lines long, lO-ribbed, rusty-pubescent, with subulate teeth as long as tube; corolla 

 purple, 3 lines long; banner orbicular, cordate at base, the midrib very hairy on 

 back; keel hairy on under side; style (except tip) and ovary (except base) densely 

 short-hairy when young; ovules 2, collateral. 



Desert valleys, 175 to 500 feet : Colorado Desert. Arizona to Sonora and Lower 

 California. Apr.-May. 



Fig. 204. Parosela emoryi Hel. a, 

 fl. branch, X % ; ft, fl., X 2 ; c, pistil, 

 X5. 



Field note. — Wings and banner each with a slight notch at apex, a glandular mucro in the 

 notch. Wings pubescent on lower side. The flowers instantly stain purple the hands or field- 

 press paper. 



Locs. — Algodones Sand Hills near Grays Well, Jepson 11,723; Signal Mt., Ahrams 6323; 

 Carrizo Creek, T. Brandegee ; San Felipe wash, w. Colorado Desert, Jepson 8899; Borrego Spr., 

 Jepson 8891 ; Silent Canon, Santa Rosa Mts. (se. end), Jepson 11,697 ; Palm Sprs. of San Jacinto, 

 Jepson 6060; Indio, Jones; Painted Canon, Mecca, Jepson 11,690a; McCoy Wash, McCoy Mts., 

 Ball. 



Refs.— Parosela emoryi Hel. Cat. N. Am. PI. ed. 2, 6 (1900) ; Jepson, Man. 558 (1925). 

 Balea emoryi Gray, Mem. Am. Acad. n. ser. 5 :315 (1854), type loc. "desert tablelands, Gila River, 

 Ariz.," Emory. Psorothamnus emoryi Rydb. N. Am. Fl. 24:47 (1919). 



