PEA FAMILY 337 



Calyx inflated in age ; tenth stamen adnate about % length of column ; bracts 

 broadly ovate, acute, glandular-dotted, little longer than the pedicels. 



3. P. physodes. 

 Calyx not inflated; tenth stamen adnate about Y^ length of column; bracts 



ovate-lanceolate, black-pubescent, l^ to Yz as long as the flowers 



4. P. rigida. 

 Peduncles longer than the leaves ; calyx black -villous, its lower tooth nearly as long as 



the corolla; bracts broadly ovate, abruptly acute, caducous 5. P. douglasii. 



Stamens diadelphous, the tenth stamen free or nearly so. 



Leaves glabrous or nearly so ; calyx nearly glabrous, conspicuously dotted with saucer- 

 shaped sessUe glands; bracts broadly 6vate, long-acuminate, undulate-mar- 

 gined, about % as long as the flowers, persistent 6. P. hallii. 



Leaves pubescent or puberulent ; calyx silky, ostensibly non-glandular ; bracts roiindish- 



ovate, acuminate, less than half as long as the flowers, deciduous 



7. P. macrostachya. 



B. Plants from tuberous roots; leaves palmate with 5 or 6 leaflets; pod circumscissile or 

 bursting irregularly, the beah long. 



Pedicels slender, 2 lines long; calyx-lobes nearly regular 8. P. calif ornica. 



Pedicels less than 1 line long or none; calyx-lobes markedly irregular, the lower one elliptic, 

 large 9. P. castorea. 



1. P. orbicularis Lindl. Stems creeping and rooting, the long-petioled leaves 

 and peduncles erect; peduncles 10 to 24 inches long; herbage finely pubescent, the 

 inflorescence densely whitish-villous; leaflets 2^/2 to 4 inches long, the lateral pair 

 broadly obovate, the terminal one more nearly orbicular; petioles 6 to 21 inches 

 long; spikes 3 to 10 inches long; bracts lanceolate, caducous, its glands sessile; 

 flowers 6 to 8 lines long; calj^x with stipitate glands scattered among the hairs, cleft 

 almost to the base, the lowest tooth as long as the corolla; petals livid red, whitish 

 towards base; banner often with a white spot on each side of the midvein; pods 

 ovate, acute, 3 lines long. 



Grassy vales, meadows or creek bottoms, 500 to 4000 feet: coastal Southern 

 California; Coast Ranges from San Luis Obispo Co. to Sonoma and Napa Cos.; 

 Sierra Nevada from Mariposa Co. to Shasta Co. Lower California. May-July. 



Locs. — S. Cal. : Arroyo Seco, San Gabriel Mts. (McClatchie, Fl. Pasadena, 639); Arrastre 

 Creek, San Gabriel Mts., Peirson 2474; San Bernardino, Parish; Santa Ana, Alice King; Palo- 

 mar Mt., T. Brandegee; Witch Creek, San Diego Co., Alderson. Coast Eanges: Morro, San Luis 

 Obispo Co., Barber; Santa Lucia Creek, Santa Lucia Mts., Jepson 4752; Pacific Grove, Heller 

 6793; Mt. Diablo, McLean; Lake Temescal, Oakland, comm. Susie Mott ; Claremont Canon, 

 Berkeley, Jepson 7679 ; Bolinas Bay, Kellogg; Eoss Valley, Marin Co., Jepson 13,591 ; Howell Mt., 

 Jepson 13,589; Pt. Arena, Sonoma Co., Bioletti. Sierra Nevada: Bowers Cave, Mariposa Co., 

 Jepson 13,590; Confidence, Tuolumne Co., Jepson 7700; Pine Grove, Amador Co., Hansen 4; 

 Plumas Co. (Bot. Cal. 1:139) ; Morleys sta., Shasta Co., M. S. Baiter. 



Eefs. — PsoRALEA ORBICULARIS Lindl. Bot. Eeg. t. 1971 (1837), type cult, from seed sent 

 from California by Douglas; Jepson, Fl. W. Mid. Cal. 294 (1901), ed. 2, 233 (1911), Man. 559 

 (1925). Lotodes orbiculare Ktze. Eev. Gen. PI. 1:194 (1891). Eoita orbicularis Eydb. N. Am. 

 Fl. 24:11 (1919). 



2. P. strobilina H. & A. Stems erect, 2 to 3 feet high; herbage villous or pu- 

 bescent throughout, the upper surface of the leaves subglabrous; stems, peduncles 

 and petioles rather densely sprinkled with tack-shaped glands; inflorescence vil- 

 lous; leaflets orbicular to rhombic-ovate, 1% to 2% inches long; stipules mem- 

 branous, narrowly ovate, acuminate, about 5 lines long; peduncles shorter than 

 the leaves; spikes short-oblong, 1 to 2 inches long; bracts 7 to 9 lines long, conspicu- 

 ous; calyx 6 to 9 lines long, the lower tooth much the longest and equaling the 

 purple corolla; ovary white-pubescent, the lower part glabrous. 



Hill country or brushy slopes, 100 to 2000 feet : Oakland Hills to the Santa 

 Cruz Mts. May-June. 



Psoralea strobilina, the most narrow endemic of any of our species in this genus, save for 

 P. hallii as at present known, is, on the whole, infrequently collected. It does not appear to have 

 been found in the Oakland Hills since early days. Behr (Fl. Vic. S. F. 262) cites "Contra Costa 

 range", an old-time term which meant or at least included the Oakland Hills. 



