Part 1, 1919] FABACEAE: PSORALEAE 43 



long; rachis with subulate glands, more or less spinescent; bracts subulate, 2-3 mm. long; 

 pedicels about 0.5 mm. long; bractlets minute, subulate; calyx glabrate except the ciliate 

 margins of the lobes; tube turbinate, 3 mm. long, sparingly and minutely glandular-dotted; 

 lobes 2 mm. long, the upper two triangular-ovate, twice as broad as the rest, which are lance- 

 subulate; corolla purple; petals subequal, the blades 4-5 mm. long, the claws 2 mm. long; 

 blade of the banner suborbicular, notched, those of the other petals broadly obliquely obovate, 

 with a large rounded basal lobe; pod obliquely ovate, nearly glabrous, conspicuously glandular- 

 dotted, the body S mm. long or more, equaled by the beak. 



Type locality: Nevada. 



Distribution: Nevada, and Owen's Valley, California. 



4. Psorodendron Fremontii (Torr.) Rydberg. 



Dalea Fremontii Torr.; A. Gray, Mem. Am. Acad. II. S: 316. 1854. 

 Parosela Fremontii Vail, Bull. Torrey Club 24: 16. 1897. 



A low shrub, intricately branched ; branches straw-colored, strigose-canescent when young ; 

 leaves 2-4 cm. long, strigose-canescent; leaflets 1-7, oblong, elliptic, or rarely obovate, 5-10 

 mm. long, glandular-dotted, obtuse at the apex, acute at the base, scarcely decurrent; racemes 

 5-10 cm. long; bracts subulate, soon deciduous; pedicels 1-2 mm. long; bractlets subulate, 1 

 mm. long; calyx sparingly strigose-canescent; tube turbinate, 2.5 mm. long; lobes about 2 mm. 

 long, acute or short-acuminate, the upper two triangular, about twice as broad as the lowest 

 one; corolla purple; petals subequal, the blades 4.5-5 mm. long, the claws about 2 mm. long; 

 blade of the banner broadly obcordate, slightly round-lobed at the base, those of the other 

 petals obliquely obovate, rounded at the apex, with a more prominent rounded lobe at the 

 base; pod obliquely obovate, sparingly strigose, conspicuously glandular-dotted, the body 

 about 1 cm. long, 5 mm. wide, the beak 8-10 mm. long. 



Type locality: "Mountains of the Pah-Utah country" [near Muddy River, southern Nevada]. 

 Distribution: Southern Nevada, southwestern Utah, and southeastern California. 



5. Psorodendron Johnsoni (S. Wats.) Rydberg. 



Dalea Johnsoni S. Wats. Bot. King's Expl. 64. 1871. 

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



A diffusely branched shrub, 1-2 m. high; branches ash-colored, strigose-canescent when 

 young; leaves 2-5 cm. long, somewhat strigose-canescent; leaflets 5-11, linear or linear-ob- 

 lanceolate, 5-15 mm. long, acute at both ends or obtuse at the apex, not conspicuously glandu- 

 lar-dotted; racemes 3-7 cm. long, loosely flowered; bracts subulate, 1-1.5 mm. long, caducous; 

 pedicels about 1 mm. long; bracts subulate, minute; calyx sparingly strigose; tube turbinate, 

 3-4 mm. long; lobes 2.5-3 mm. long, acuminate, the upper two ovate-lanceolate, nearly twice 

 as broad as the lanceolate lowest one; corolla deep-purple; petals nearly equal, the blades 

 about 7 mm. long and the claws 3 mm. long; blade of the banner broadly oval, emarginate, those 

 of the other petals obliquely obovate, rounded at the apex and with a conspicuous rounded 

 basal lobe; pod obliquely ovate, sparingly strigose and conspicuously glandular-dotted, the 

 body 8 mm. long, 5 mm. wide, the beak 8 mm. long. 



Type locality: St. George, on the Virgin River, Utah. 



Distribution: Southern Utah, northern Arizona, southern Nevada, and southeastern Cali- 

 fornia. 



6. Psorodendron californicum (S. Wats.) Rydberg. 



Dalea californica S. Wats. Proc. Am. Aead. 11: 132. 1876. 

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

 Parosela californica simplicifolia Parish, Bot. Gaz. 55: 309. 1913. 



A shrub, 1-2 m. high, much branched; branches ashy or straw-colored, sparingly glandular- 

 dotted, densely strigose-canescent when young; leaves 1-5 cm. long, densely strigose-canescent; 

 leaflets 1-7, or on the shoots 7-11, oblong, or oblanceolate, 5-15 mm. long, more or less de- 

 current and the upper confluent; racemes 2-6 cm. long; rachis somewhat spinescent in age, 

 strigose-canescent; bracts lance-subulate, 2 mm. long, deciduous; pedicels 1-2 mm. long; 

 bractlets subulate, minute; calyx densely canescent; tube turbinate, 3 mm. long; lobes about 

 2 mm. long, the upper two ovate, the rest lanceolate, acute; corolla dark-blue; petals subequal, 



