538 PROCEEDINGS OF THE AMERICAN ACADEMY 



than 1" long ; petals " blue and white," 2 - 3" long, narrow, the banner 

 slightly shorter, the calyx and petals nearly as in L. micranthus ; 

 pod y long, 4 - 5-seeded. — From Monterey to Southern California. 



§2. PLATYCAEPOS. Flowers as in § Lupinus ; ovules 2; 

 cotyledons broad and clasping after germination, usually long-per- 

 sistent. — Annuals ; leaflets several, cuneate-oblong or -obovate ; 

 bracts persistent ; pods ovate. 

 * Flowers verticillate ; stems tall ; racemes long-peduncled. 



51. L. microcarpus, Sims. Villous with long spreading hairs, 

 £-11° high ; stipules long, setaceous ; leaves mostly approximate upon 

 the stem, on elongated petioles; leaflets 7-11, usually 9, cuneate- 

 oblong, 1-2' long, obtuse and mucronulate or emarginate, or some- 

 times acutish, smooth above; flowers in close verticils, on pedicels 

 1 - 2" long ; bracts subulate-setaceous, equalling the calyx or shorter ; 

 calyx densely villous, lower lip large, 3-toothed, the middle tooth 

 small, the upper lip very short, subscarious, toothed ; bractlets small, 

 often wanting ; petals purple, or sometimes flesh- or cream-colored or 

 white, 6 - 7" long, equal, the keel slightly ciliate ; pods villous, 8" 

 Ions. — From the Columbia River to Southern California; stouter 

 than most Chilian specimens. It occasionally approaches closely to the 

 next in pubescence and in the color of the flowers. 



52. L. densiflorus, Benth. Much resembling the last, but more 

 sparingly villous with shorter hairs ; bracts much shorter than the ca- 

 lyx, which is smooth or short-pubescent, the upper lip often entire ; 

 petals yellow, or ochroleucous, white or pink. — From the Sacramento 

 Valley southward. It includes L. 3fenziesii, Agh. ; and L. succulentus, 

 Koch, is probably but a garden form. 



53. L. Bridgesii, Gray, MS. in herb. Stem 1-2° high, rather 

 slender, branched ; pubescence short, appressed, subsilky, the bracts 

 and pod villous ; stipules short ; leaves scattered ; petioles short ; leaf- 

 lets 5-9, usually 7, cuneate-oblong, 1' long, obtuse or acute, pubescent 

 both sides or sometimes smooth above ; bracts linear-setaceous, exceed- 

 ing the calyx; flowers as in the last, the' petals pale-yellow, 6" long. — 

 Sacramento Valley. Collected by Bridges (55), Bolander (6512), and 

 Dr. Kellogg. 



* * Low ; flowers scattered ; bracts shorter than the calyx. 



54. L. pdsillus, Pursh. Rather stout, 3-10' high, diffusely 

 branched, hirsute with long spreading hairs ; leaflets usually 5, cuneate- 



