1912] NELSON—IDAHO PLANTS 3 221 
Lupinus multitinctus, n. sp.—Strongly tufted, 4-7 dm. high: 
stems sparingly branched above, leafy above, the lower stem leaves 
and most of the root leaves wanting at maturity, from glabrate to 
minutely pubescent: leaves green, but silvery-silky below, and 
sparsely pubescent above; petioles slender, the radical and lower 
cauline several times longer than the leaflets, the uppermost about 
equalling the leaflets; leaflets 7-11, broadly linear, tapering to the 
acute ends, 3~5 cm. long: racemes rather slender, dense, 6-12 cm. 
long; flowers many colored, ranging from nearly white through 
various shades of yellow to pinks and purples, the individual 
flowers usually bi- or tri-colored, in 3~5-flowered verticils, on short 
pedicels which in fruit become 5-8 mm. long; bracts linear, nearly 
as long as the calyx, caducous: calyx appressed-silky, with thick 
spur as long as its tube, its lips merely short entire teeth: standard 
obscurely if at all pubescent, the blade orbicular, about 10 mm. 
broad, the short base spurred and extending to the base of the 
calyx spur; wings obovate-elliptic, very delicate, beautifully cross- 
veined on one side; keel narrow, its darker tip rather conspicuously 
extruded: pods broad and very flat, densely silvery-silky, with 
subappressed pubescence, 2—5-seeded. 
This new member of the CALCARATI section will most readily be dis- 
tinguished from the relatively few other spurred species by the beautiful and 
singular variation in colors shown by the flowers of even a single clump. Like 
the other members of the section, this shows a slight ciliolation on the middle 
of the keel. From L. Jaxiflorus Dougl. it may be distinguished by its entire 
calyx lobes and the more numerous and narrower leaves. No. 114, from 
steep, north slopes, near Big Willow, near Falk’s Store, Canyon County, by 
MAcsrIpE, is typical. 
Lotus Macbridei, n. sp.—Glabrous perennial from a short 
narrowly conical taproot with enlarged crown and numerous semi- 
fleshy fibrous roots: stems slender and crowded on the crown, 
widely spreading, or prostrate with assurgent tips, 15-50 cm. long: 
leaves mostly trifoliate, the petioles 3-8 mm. long; leaflets narrowly 
oblong or oblanceolate, acute or obtuse, 6-16 mm. long; stipules 
resembling the leaves and about as large, oblong-lanceolate: 
flowers a pure yellow, in close almost capitate terminal clusters 
of 3-7: calyx campanulate, subsessile on the short obconical base, 
