258 Ri\DBERG: STUDIES ON THE 
cled and dense; bracts ovate-lanceolate, acuminate, deciduous ; 
the short pedicels and the calyx densely pubescent with short 
spreading hairs; lips of the calyx ovate-lanceolate, the lower 
slightly longer than the upper: flowers 10-12 mm. long; banner 
light purple with a dark spot, glabrous, much shorter than the 
white or purple-tinged wings; keel white with purple tip: pods 
oblong, densely pubescent, 2.5—3 cm. long, 4—5-seeded. 
The type was labeled Lupinus parviflorus, to which it is some- 
what related, but the raceme is much denser, the flowers larger, 
the corolla of a different color and with a very dark spot. 
Urau: P. V. Junction, Wasatch Mts., 1883, JZ. £. Jones (type 
in herb. N. Y. Bot. Garden and duplicates in U. S. Nat. Herb.) ; 
Woods Class, 1882, AZ. E. Jones. 
Lupinus pulcherrimus sp. nov. 
Perennial, more or less cespitose: stems 3—6 dm. high, spar- 
ingly appressed hairy, leafy: petioles 3-6 cm. long, also appressed 
hairy or glabrate ; leaflets 7-9, linear-oblanceolate, acute, appressed 
silky on both sides, but green ; stipules lanceolate, subulate : raceme 
more or less elongated and rather dense, short-peduncled ; bracts 
lanceolate, short-acuminate, shorter than the buds, deciduous: 
pedicels and calyx grayish silky; lips of the latter lanceolate, the 
upper somewhat shorter: flower about 1 cm. long: corolla dark 
purple ; banner with a light spot, pubescent on the back: pods 
broadly oblong, 3—3.5 cm. long, 5—6-seeded. 
This species is also related to L. /axiflorus, but the raceme is 
denser, the calyx scarcely spurred, and the flowers are larger. It | 
also resembles L. pseudoparvifiorus, but in that species the leaves are 
glabrous above and the calyx also spurred. From L. adscendens 
it differs in the spreading flowers and the short bracts. 
_ Wyomine: Battle, Continental Divide, 1901, / Tweedy, 4215 
(type in herb. N. Y. Bot. Garden) ; Headwaters of Tongue River, 
1898, Tweedy, 130; Big Horn Mountains, 1899, Tweedy, 2365 ; 
La Barge, Uintah County, 1894, 2. Stevenson, 158. 
Montana: Divide between McDonald and Comas Lakes, 1901, 
F. K. Vreeland, 996 ; Little Belt Pass, 1896, P. A. Rydberg, 3318 ; 
J. H. Flodman, 620; Baltic, 1900, E. V. Wilcox, 58. 
Lupinus laxus sp. nov. 
Perennial and somewhat cespitose : stem 4-6 dm. high, slender, 
sparingly appressed, silky: petioles 3-12 cm. long, appressed 
