Lupinus. LEGUMIXOS-K. \yj 



§ 1. Flowers in terminal racemes: sides of the standard reflexed : ovules several: 

 cotyledons pelioled in germination. — Lupixus proper. 



* Perennials, not dwarf: stems someiohat woody in Xos. 1 to 3, the rest wholly her- 

 baceous, and Nos. 4 to 7 rnost/y succulent and fistulous : jmls oblong. Spec. 1 to 24. 



+- Floivers large: ovules 6 to 12. 



++ More or less woody at base, tall, leafy, with short petioles : pubescence silky, mostly 

 appressed : bracts deciduous : floivers on slender pedicels : calyx-lips nearly equal : 

 ovules mostly 8 to 12. 



1. L. arboreus, Sims. Shrubby, often 4 to 10 feet high : pubescence not 

 dense, short : leaflets 7 to 11, mostly 9, glabrate above, narrowly lanceolate, f to 

 If inches long, acute: raceme loose; bracts linear, equalling the calyx: flowers 

 mostly verticillate, sulphur-yellow, fragrant : calyx-lips broad, entire or nearly so : 

 keel slightly ciliate : pod pubescent, usually 10- 12-seeded, 1J to 3 inches long, 

 4 to 6 lines wide : seeds oblong-oval, terete, three lines long, dark-colored. — Bot. 

 Mag. t. 682 ; Lindl. Bot. Keg. xxiv, t. 32 ; Watson, 1. c. 523. L. rivularis, Agardh, 

 Synopsis, 24. L. macrocarpus, Hook. & Am. Bot. Beechey, 138. 



From Sacramento Valley to San Diego, common ; from April to August. Specimens rarely 

 occur with the pubescence more dense, villous, ami somewhat spreading. The flowers also appear 

 to be sometimes blue or purplish. Used successfully as a protection against drifting sands. 



2. L. Chamissonis, Esch. Less shrubby, 1 to 4 feet high : pubescence dense, 

 appressed : Jeaflets 7 to 9, cuneate-obovate, a half to an inch long, obtuse and ruu- 

 cronulate or acutish, very silky on both sides : bracts lanceolate, shorter than the 

 calyx : flowers subverticillate, blue, violet, pink, or white : upper calyx-lip deeply 

 cleft; bractlets small, setaceous : keel usually slightly ciliate : ovules 6 to 8 : pod 

 silky, \\ inches long, 4-8-seeded: seeds broader, somewhat flattened, 2A lines long, 

 light-colored and mottled. — Mem. Acad. Petr. x. 288. L. albifrons, Benth. in 

 Hurt. Soc. Trans, n. ser. i. 410; Lindl. Bot. Beg. t. 1642; Watson, 1. c. 523. 

 L. sericeus, Hook. & Arn. Bot. Beechey, 138. 



Var. longifolius, Watson. Scarcely woody at base : stems less leafy and peti- 

 oles more elongated : keel pubescent near the margin. 



Var. (?) longebracteatUS, Watson. Stem and branches more or less villous : 

 bracts much exceeding the calyx. — L. macrocarpus, Torr. in Paeif. I.'. Rep. iv. 81. 

 From Oregon to Southern California, common. The variety I from San Dii go 



to Ojai (Mfain), San Pascual [Tluirber) and San Antonio River, Brewer. The var. 

 ■acUatus about San Francisco , Green >, and Punta de h>s Reyes, Bigclow. 



3. L. Douglasii, Agardh. Slightly woody at base: pubescence short, tomen- 

 tose or silky, appressed: leaflets 7 to 9, ohlanceolate or sometimes cuneate-oblong, 

 1 to 1A inches long, pubescent on both sides : racemes often Iong-ped uncled : bracts 

 linear-setaceous, exceeding the calyx: flowers scattered or subverticillate, blue oi 

 purple: calyx with long setaceous bractlets, the upper lip nearly 2-parted : keel 

 ciliate: ovules 8 to 9 : pod unknown. — Synopsis, •'> I : Watson, 1. c. 524. 



From above San Francisco to Monterey and Los Angeles. 



++ ++ Stems mostly succulent and fistulous : leaflets glabrous above, oblong to obi 



olatc : jhtnvrs sidivcrtirillatf : bracts d<ci<ln<iii.i ; calyx usual/;/ slightly toothed: 

 ovules 8 or more. 



4. L. polyphyllus, Lindl Stout, erect. 2 to 5 feet high, sparingly villous, the 

 calyx, pedicels and youngest leaves silky-pubescent : stipules large, triangular I i 

 subulate: leaves distant, long-petioled ; leaflets l 11 to 16, or often 8 to 10 in the 

 upper leaves, 2 to ii inches long : racemes frequently a foot or two long ; bracts ob 



long lanceolate, equalling or shorter than th ilvx : flowers mostly scattered, on 



long pedicels, blue, purple, or white : calyx lips nearly equal, entiri ; bi ictleta often 



