SMITH: STUDIES IN THE GENUS LUPINUS 181 
wide; petals (according to Dr. Hall’s labels) light blue, the banner 
with a white center; banner 12-14 mm. long, 8-9 mm. wide, ovate 
to ‘‘ broadly elliptic,’’ obtusely angled, truncate, or rounded at the 
apex, the basal inflation much thickened and stiff; seeds pale 
yellowish brown, sparsely mottled with dark brown, the consider- 
ably paler hilum area marked off by prominent V-shaped lines. 
CALIFORNIA. Ventura County: Griffin’s Postoffice, June, 
1902, A. D. E. Elmer 3588 (DS, US, NY); Griffin, Mt. Pinos, 20 
June, 1905, H. M. Hall 6334 (G, UC); near Frazier borax mine, 
Mt. Pinos, 12-14 June, 1908, Abrams & McGregor 262 (DS, US). 
While with his description Elmer gives the date of collection 
of his number 3588 as July, 1902, his labels give June as the month. 
His number 4006, however, from the same locality, is labeled as 
having been taken in July; but the latter is a very different plant, 
and has been treated by me elsewhere as L. subvexus nigrescens 
(Bull. Torrey Club 45:13. 1918). 
LACTEI 
6h. Lupinus densiflorus lacteus (Kell.) comb. nov. [Fic. 25,] 
Lupinus lacteus Kell. Proc. Cal. Acad. Sci. 5: 37. 1873. 
Lupinus arenicola Heller, Muhlenbergia 2: 75. 1905. 
Kellogg’s description of L. lacteus is, in part, as follows: 
Stem annual, fistulous, the elongated central peduncle from a mere depressed 
crown, mostly solitary, spike 4 to 8 inches long, lateral radicle branches 2 to 6 inches 
long, with secondary clusters of leaves and (when present) shorter spikes, soft pubes- 
cent throughout, with white hairs. Leaves mostly clustered at the base . . . leaf- 
lets . . . silky-pubescent beneath. . . . Flowers large, white, somewhat distant, 
aber . . . calyx ebracteolate, hirsute . . . upper lip 2-cleft (rarely entire) 
nc ¥ the length of the lower lip, lower lip straight, herbaceous, 2-toothed .. . 
um .. . ciliate at the Ry prs juncture of the claw . . er, wings and 
‘acs ora equal, wings oblon . . Margins ciliate at the ices or origin of the claw; 
keel ciliate at the upper Ay margin toward the base. 
In habit and general appearance this species resembles L. brevicaulis, but is 
rather more robust, the flowers sic larger and not “‘deep blue,’ but quite white, 
- Itisclosely allied to L. Menziesii. . . . Specimens collected by Mr. S. Brannan. 
S on Oak Creek hillsides, Kern County, 14 miles from Tejon Pass 
Extracts from Heller’s description of L. arenicola follow: 
Branches several, ascending, commonly only the middle one floriferous . 
flowers in 1 to 3 whorls, merely ascending, whitish or rose color, 1.5 cm. long . . 
calyx with broad acutish lower lip 7 mm. long, 5 mm. wide at base, the apex sniectiake 
2-toothed; upper lip ovate . . . the apex 2-toothed, the teeth 1 mm. long, slightly 
spreading; banner turned back ... keel . . . little curved, ciliate on the lower 
half, . eseile large, 4 mm. in Bisisiee. white or whitish. 
