314 LEGUMINOSAE 



Umbels 4 to 7-flowcred, making a loose cluster; peduncles 2 to 4 lines long; mainland 



25. L. criophorus. 

 Umbels 12 to 20-flowered, making a dense globose cluster; peduncles ^4 to 1% inches 



long ; insular 26. L. ornithopus. 



Herbage glabrous or subglabrous or the pubescence scanty and appressed ; stems commonly wiry 

 or rush-like in habit, the leaves small and often few. 

 Branches stoutish or wiry, but not filiform ; leaves 3 to 12 lines long. 



Abundant species, widely distributed; calyx-teeth subulate; umbels sessile or short- 

 peduncled, some or many 3 to 5-flowered, and some or few 1 or 2-flowered, the 



vars. 5 to 12-flowered; bracts none, rarely present 27 . L, scoparius. 



Eare species along the central coast. 



Umbels 5 to 11-flowered, peduncled ; bracts of 1 or 2 leaflets ; calyx-teeth subulate.... 



28. L. benthamii. 

 Umbels 1 to 4-flowered, mostly subsessile; bracts mostly none; calyx-teeth short- 

 triangular 29, L. junceus. 



Branches almost filiform; leaves % to 3 lines long; umbels 1 or 2-flowered; rare, e. San 

 Diego Co 30. L. haydonii. 



1. L. incanus Greene. Seymour Lotus. Steins several from the root-crown, 

 erect, 4 to 11 inches high; herbage clothed in a dense thick fur of soft hairs; 

 leaves % to 2i/^ inches long; leaflets 7 to 13, obovate to oblong or lanceolate, 3 to 

 81/2 lines long, those of the lower leaves orbicular, crowded; peduncles i/4 to l^A 

 inches long; umbels 5 to 12-flowered; bract commonly of 5 leaflets; flowers 6 to 7 

 lines long; calyx-teeth linear-subulate, V2 to % as long as tube; banner reddish, 

 wings white ; pods linear to narrowly oblong, thick or subterete, % to 1 inch long, 

 11/2 to 2% lines wide. 



Opens in pine woods, 2500 to 3600 feet : northern Sierra Nevada from Placer 

 Co. to Butte Co. May-July. 



Locs. — Alta, K. Brandegee; Cape Horn, K. Brandegee; Blue Canon, E. A. Walker 1278; 

 Grizzly Eidge, Middle Fork Yuba Eiver, Nevada Co., L. S. Smith 1554; Stirling City, Heller 

 10,797. 



Eefs.— Lotus incanus Greene, Pitt. 2:147 (1890); Jepson, Man. 548, fig. 539 (1925). 

 Hosackia incana Torr. Pac. E. Eep. 4:79, pi. 4 (1857), type loc. dry hills near South Yuba, Bige- 

 low. There is a prior Lotus incanus Dougl. in Hook. Fl. Bor. Am. 1:134 (1830), but published 

 as a synonym. The common name, above, is for Leland Seymour Smith, United States Forest 

 Service, long a collector of Sierran plants who adds a new station to the few that are known for 

 this species. 



2. L, crassifolius Greene. Buck Lotus. Stems erect, fistulous, ll^ to 4 feet 

 high, with long internodes, the branches few, often flexuous; herbage glabrous or 

 minutely puberulent; leaves 31/2 to 7% inches long; leaflets commonly 9 or 11, 

 oval, rhombic or obovate, almost coriaceous, 10 to 16 lines long, on petiolules 1 line 

 long; peduncles 1 to 3 inches long, bracted above the middle with a 3-foliolate peti- 

 oled leaf; umbels 7 to 15-flowered, some or all one-sided; flowers 6 to 7 lines long; 

 calyx-teeth usually very short and subulate-triangular; corolla greenish-yellow or 

 whitish, marked with purple spots; pods terete, lYz to 2% inches long, (l^^ or) 

 2 to 3 lines wide, 7 to 12-seeded. 



Dry montane slopes or flats, back of the coast or in the interior, 2300 to 8000 

 feet: high mountains of Southern California; Coast Ranges from San Luis Obispo 

 Co. to Siskiyou Co.; Sierra Nevada from Kern Co. to Modoc and Siskiyou Cos. 

 South to Lower California. North to Washington. May-July. 



Field note. — A common species in the Yellow Pine and upper chaparral belt, Lotus crassi- 

 folius is seldom found near the coast. The heads of flowers in anthesis are always turned down- 

 ward. In the fruiting stage, the branches often bend to the ground under the weight of the pods. 



Locs. — S. Cal.: Cuyamaca, T. Brandegee; Palomar, Jepson 1490; Fern Valley, San Jacinto 

 Mts., Munz 6061; San Bernardino Mts., Parish; Mt. Gleason, Elmer 3697; Kock Creek, San 

 Gabriel Mts., Peirson 103. Coast Eanges: San Antonio trail, Santa Lucia Mts., Jepson; Alma 

 Soda Spr., Santa Clara Co., Heller 7489; Mt. Diablo, Bioletti; Collins Camp, Vaca Mts., Jepson 

 13,782; "Wild Horse Canon, nw. Solano Co., Jepson 2452b; Potter Valley, Mendocino Co., Purpus; 

 Snow Mt., n. Lake Co., M. S. Baker; betw. Orleans Bar and Sommes Bar, ne. Humboldt Co., 

 Chandler 1470 ; Sisson, Siskiyou Co., Jepson 13,783 ; Humbug Creek, n. Siskiyou Co., Butler 775. 

 Tehachapi Mts., Hasse 4- Davidson. Sierra Nevada: Cedar Creek, North Fork Kaweah Eiver, 



