SMITH: STUDIES IN THE GENUS LupINus—IX Rts 
Key to the varieties of Lupinus bicolor * 
Keel non-ciliate, or with one to four stray cilia; 
flowers 5-8 mm. long. d. var. Pipersmithai. 
Keel distinctly ciliate on upper edges, between 
middle and apex 
Lower calyx-lip trifid; flowers 5-8 mm. long. 6g. var. trifidus. 
Lower calyx-lip tridentate or subentire. 
Flowers 8-12 mm. long. 6a. L. bicolor. 
Flowers 4-8 mm. long. 
Flowers 6-8 mm. long. 
Racemes reduced to one verticil, or with 
more or less of two. 6b. var. umbellatus. 
Racemes of three to six, or more, verticils. 6c. var. tridentatus. 
Flowers 4-6 mm. long. 
Pods five- to eight-seeded. 6e. var. microphyllus. 
Pods four- or five-seeded. Of. var. tetraspermus. 
6b. Lupinus bicolor umbellatus (Greene) comb. nov. [Fic. 86.] 
Lupinus umbellatus Greene, Bull. Cal. Acad. 2: 145. 1886. 
Differing only in the reduction 
in the racemes and flowers, the Co ee 
former usually reduced to one / 
verticil, the latter in size to about 
7mm.long. Most, if not all, of 
the mainland collections referred ~~ {cm. 
here by the collectors I have 
: ‘ FIG. LUPINUS BICOLOR UM- 
considered it better to refer tO gprrtatus (Greene) C. P. Smith. 
other varieties of the species. T. S. Brandegee, Santa Cruz Island 
CALIFORNIA. Santa Barbara wes 
County: Santa Cruz Island, July and Aug., 1886, E. L. Greene 
(UC);same, April, 1888, T. S. Brandegee (UC) ; same, May, 1908, 
Frida Niedermiiller (UC): same, 1919, Mrs. A. Swain (CA). 
6c. Lupinus bicolor tridentatus Eastwood, var. nov. [Fic. 87.] 
planta typica differt floribus minoribus 6-8 mm. longis, lab- 
io inferiore calycis tridentato, vexillo elliptico ad obovato vel 
late spatulato, carina ciliata. 
Differing from typical L. bicolor in the reduced size of the 
flowers, which are from 6-8 mm. long, in from three to six or 
more distinct verticils, the lower calyx-lip distinctly three- 
toothed. Greatly varying in stature, more commonly 15-25 
cm. tall, but sometimes lower and again as much as 40 cm. tall. 
use the minimum measurements for dried flowers 
or fresh flowers only. 
* In following this key, 
only and the maximum measurements f 
