554 FABACEAE 



3. Psoralea macrostachya DC. Leather Root. Fig. 2752. 



Psoralea macrostachya DC. Prod. 2: 220. 1825. 



Lotodes macrostachyum Kuntze, Rev. Gen. PI. 194. 1891. 



Hoita macrostachya Rydb. N. Amer. Fl. 24: 9. 1919. 



Perennial, the stems 5-30 dm. high, glabrous to canescent-puberulent. Stipules 3-5 mm. long, 

 subulate ; petioles 3—12 cm. long ; leaflets 2-8 cm. long, ovate-rhombic to ovate-lanceolate, glabrate 

 to cinereous-pubescent ; peduncles 4-10 cm. long, glabrous to cinereous ; racemes rather narrow, 

 5-12 cm. long; rachis densely white- or black-pubescent; bracts ovate to rhombic, cuspidate, 

 caducous, 5-8 mm. long ; calyx densely villous, the lobes unequal, the cleft between the upper two 

 the shortest, and those on each side of the lowest lobe deepest, the lowest lobe about equaling 

 or exceeding the purple corolla; standard suborbicular, 10 mm. long; stamens diadelphous. 



Moist ground along streams, wet meadows and salt marshes, Upper Sonoran and Transition Zones; Coast 

 Ranges, central California to San Diego County. Type locality: reported as Nootka, but probably Monterey, 

 California. May-Tuly. A variable species, and several species have been proposed. Hoita rhomboida. H. longi- 

 loba, H. villosa, H. Hallii Rydb. (N. Amer. Fl. 24: 9-10. 1919); and Psoralea Douglasii Greene (Erythea 3: 

 99. 1895) represent minor geographic variations possibly with a subspecific rank. California Hemp. 



4. Psoralea strobilina Hook. & Arn. Loma Prieta Psoralea. Fig. 2753. 



Psoralea strobilina Hook. & Arn. Bot. Beechey 332. 1838. 

 Lotodes strobilinum Kuntze, Rev. Gen. PI. 194. 1891. 

 Hoita strobilina Rydb. N. Amer. Fl. 24: 11. 1919. 



Perennial from a rootstock, the stems erect, 6-10 dm. high, densely puberulent with inter- 

 mingling long viscid hairs, and short tack-shaped glandular ones. Stipules ovate, cuspidate, 

 petioles 3-7 cm. long; leaflets 3-6 cm. long, broadly ovate to suborbicular, those of the lower 

 leaves sometimes broader than long, pubescent and abundantly glandular-punctate ; peduncles 4-6 

 cm. long, with pubescence the same as on the stem ; racemes dense, 3-6 cm. long ; rachis densely 

 black-hairy; bracts broadly ovate, acuminate, glandular and hirsute; calyx densely villous- 

 hirsute, and glandular ; tube 5 mm. long ; teeth linear-lanceolate, acuminate, the upper 8-10 mm. 

 long, the lowest 12 mm. long; corolla purple, 15 mm. long, the standard obovate ; stamens 

 diadelphous. 



Hillsides, Upper Sonoran Zone; central California from Contra Costa County to Santa Clara and Santa 

 Cruz Counties. Type locality: California. May-July. 



5. Psoralea orbicularis Lindl. Round-leaved Psoralea. Fig. 2754. 



Psoralea orbicularis Lindl. Bot. Reg. 23: pi. 1971. 1837. 

 Lotodes orbiculare Kuntze, Rev. Gen. PI. 194. 1891. 

 Hoita orbicularis Rydb. N. Amer. Fl. 24: 11. 1919. 



Perennial, the stems prostrate or creeping, glabrous or strigose, glandular-punctate. Leaves 

 3-foliolate, erect; petioles 1-5 dm. long; leaflets orbicular-obovate, 3-8 cm. long, glabrous to 

 cinereous-puberulent ; stipules ovate ; peduncles erect, 2-7 dm. long ; racemes dense, 5-25 cm. 

 long ; bracts oblong-lanceolate, 1-2 cm. long, scarious, conspicuously glandular-dotted and rather 

 sparsely villous-hirsute ; calyx densely villous ; tube 4-5 mm. long ; lobes linear-lanceolate, 

 acuminate, the lowest 15 mm. long, the others about 10 mm. long; corolla reddish purple, 

 15 mm. long. 



Moist places, Upper Sonoran and Transition Zones; Siskiyou Mountains, south in the Coast Ranges and 

 the Sierra Nevada to the Cuyamaca Mountains, California. Type locality: California. May-July. 



6. Psoralea lanceolata subsp. scabra (Nutt.) Piper. Lance-leaved Psoralea. 



Fig. 2755. 



Psoralea scabra Nutt. in Torr. & Gray, Fl. N. Amer. 1 : 300. 1838. 



Lotodes ellipticum var. latifolium Kuntze, Rev. Gen. PI. 193. 1891. 



Psoralea Purshii Vail, Bull. Torrey Club 21 : 94. 1894. 



Psoralea lanceolata Purshii Piper in Piper & Beattie, Fl. Palouse Reg. 106. 1901. 



Psoralea lanceolata scabra Piper, Contr. U.S. Nat. Herb. 11: 364. 1906. 



Perennial from a rootstock; stems branching from the base, erect or adsurgent, 1-6 dm. 

 high, strigose and glandular-punctate. Stipules lanceolate-subulate; petioles 15-25; leaflets nar- 

 rowly obovate to oblanceolate, 15-40 mm. long, mucronate, sparingly strigose, and conspicuously 

 glandular-punctate ; peduncles 2-4 cm. long ; racemes 1-2 cm. long ; bracts persistent, 3-4 mm. 

 long; calyx 3 mm. long, white-hairy, the teeth triangular, much shorter than the tube; corolla 

 5 mm. long, white ; pod globose, 5 mm. long, densely long-villous. 



Dry ridges and sand hills, Upper Sonoran Zone; eastern Washington to Wyoming, south to eastern Oregon, 

 Nevada, and northern Arizona. Type locality: "On the Walla- Wallah." May-July. 



7. Psoralea californica S. Wats. California Psoralea. Fig. 2756. 



Psoralea californica S. Wats. Proc. Amer. Acad. 12: 251. 1877. 

 Lotodes californicum Kuntze, Rev. Gen. PI. 194. 1891. 

 Psoralea monticola Greene, Erythea 3 : 98. 1895. 

 Pediomelum californicum Rydb. N. Amer. Fl. 24: 21. 1919. 



Perennial from a fusiform woody taproot, with a branched crown, herbage silvery-villous. 

 Basal leaves with petioles often 6-8 cm. long, bearing racemes in the axils, larger plants with 

 2 to several scape-like stems 1-2 dm. long, bearing leaves and axillary racemes toward the 



