318 



LEGUMINOSjE. 



as the upper; corolla 3 to 4^ lines long; folds on the center of the 

 banner (covering the edges of the oblique portion of the wings) much 

 more prominent. — Bay Region and northward. 



Var. pachylobus (L. pachylobus Greene). Peduncles stout; 

 flowers small, subsessile in few whorls; upper calyx-lip notched, the 

 lower entire, twice as long; pods very large. — Briones Hills, Contra 

 Costa Co. Apr. 



13. L. trifidus Torr. Branched from the base, 7 to 12 in. high, 

 densely pilose, the younger parts canescent; leaflets mostly 6 to 8, 

 linear to linear-spatulate; racemes very short, mostly 2 to 3, some- 

 times 4; upper calyx-lip deeply cleft with divergent segments, the 

 lower deeply 3-cleft into long slender segments; corolla 2 to 2h lines 

 long, blue, the white spot on the banner not changing in age; keel 

 scarcely falcate, short and obtusely pointed, sparsely ciliate from 

 above the middle to just below the apex; pod G to 8-seeded; seeds 

 quadrate-ovate, dotted or diagonally marked. 



Sandy soil about the Bay and along the seaboard: Alameda and 

 San Francisco, southward to Glen Echo (Santa Cruz Co.), Setchell 

 and Jepson; Pacific Grove, Tidestrom. Doubtless no more than a 

 good variety of the next; best known by its strikingly pilose 

 pubescence and 3-cleft lower calyx-lip. 



14. L. polycarpus Greene. Erect, somewhat succulent, with 

 rather stout branches from the base or above the middle, moderately 

 pubescent; leaflets 6 to 8, linear-oblanceolate, j to 1 in. long, raceme 

 narrow, rather short, with 4 to 7 distinct or indistinct whorls; 

 pedicels 1 line long, ascending; upper calyx-lip 2-cleft, the lobes 

 ovate, parallel; lower entire or obscurely dentate, somewhat longer; 

 corolla 1£ to 3 lines long, deep blue; banner obovate, retuse or 

 truncate, the center white, with dark dots, changing to red-purple, 

 the sides incurved, not reflexed; wings coherent at tip, inflated, 

 exposing the base of the short and nearly straight keel; keel obscurely 

 ciliate below the apex; pod rigid, slightly falcate, 1 in. long or more, 

 6 to 9-seeded. 



Occurring in its typical form in rich soil of low fields about the Bay, 

 and in a modified form on the plains of Solano Co. Characterized 

 chiefly by its rather robust habit, short narrow close racemes of small 

 flowers and many large pods. Apr. 



15. L. luteolus Kell. Slender, simple below, loosely and widely 

 branching above, 2 to 3£ ft. high, rigid, not succulent; pubescence of 

 short appressed silky hairs; leaves scattered; leaflets mostly 7. 

 cuneate-oblong, 1 in. long, obtuse or acute; bracts linear-setaceous, 

 often exceeding the calyx; flowers 6 lines long, pale yellow, nearly 

 sessile, in a dense raceme 1£ to 7 in. long; upper lip of calyx entire, 

 not scarious; lower 3-toothed. 



Stream and river beds: Contra Costa Co. , Mrs. J. T. Maynard; near 

 St. Helena, Greene, 1874; Lake Co., Jepson, 1892, and northward. 



16. L. densiflorus Benth. Resembling the last but more spar- 

 ingly villous; stem stout, somewhat succulent, simple below, parted 



