Vol. 50 No. 12 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
DECEMBER, 1923 
Studies in the genus Lupinus—IX. Lupinus bicolor 
CHARLES PIPER SMITH 
(WITH SEVEN TEXT FIGURES) 
This species, like L. nanus, the subject of my last paper 
(Bull. Torrey Club 50: 159. 1923), is so abundant, variable, 
and widely distributed that its consideration absorbs all the 
space available at this time. The next paper, however, will 
complete my treatment of the Micranthi, including a key to 
the species recognized. Of these the following is the sixth 
species in the linear arrangement adopted. 
6a. Lupinus BICOLOk Lindl. Bot. Reg. 13: pl. 1109. 1827. 
[Fic. 85.] 
Lupinus micranthus bicolor Wats. Proc. Am. Acad. 8:536. 1873- 
Lupinus sabulosus Heller, Muhlenbergia 7: 9. : 
Lupinus strigulosus Gandoger, Bull. Soc. Bot. France 60: 461- 
1913. 
Annual, fibrous, erect and simple, or diffusely branched at 
the base, 8-40 cm. tall, usually villous; leaves few or many, 
pubescent on both sides; petioles 3-7 cm. long; stipules subulate, 
5-10 mm. long; leaflets five to seven, oblanceolate or cuneate, 
4 . * * . 
long by 6-8 mm. wide, obovate, elliptic, rhombic, to orbicular- 
obovate, angled to emarginate, the purple-dotted white center 
changing to violet, the sides much 
elliptical, 6-8 by 4-5 mm., keel slender, acute, arcuate or nearly 
[The BuLLETrn for November (50: 343-372) was issued December 1, 1923.] 
373 
