SMITH: STUDIES IN THE GENUS LUPINUS 403 
Ita. LupINUS RUBENS Rydberg, Bull. Torrey Club 34: 45. 
1907. [Fic. 49.] 
Branched at or near the base, 6-15 cm. tall, villous, axial 
peduncle usually erect, commonly flowering. before the branches 
develope, racemes exceeding the foliage; flowers 6-12 mm. long, 
approximate or well scattered; pedicels 1-2. mm. long, usually 
glabrous but sometimes more or less villous; calyx-lips setose- 
villous, the cup commonly free of hairs, upper lip entire or notched, 
lower lip entire or two- or three-toothed; petals as in L. odoratus, 
the banner with a yellow center; pods ovate, 8-12 mm. long, 
- usually two-seeded, more or less villous on the sides; seed charac- 
ters yet to be determined. 
This is a variable species intermediate between L. pusillus 
and L. odoratus. One extreme, when in flower, is hardly separable 
from the New Mexican variation of L. pusillus, while other forms 
approach closely to L. odoratus. Critical cases will evidently 
have to be judged in terms of fruiting material. 


Fic. 49. Lupinus RUBENS Rydberg. 1. M. E. Jones 5138 (US); 2. M. E. 
Jones 4413 (US); 3. M. E. Jones 5024i (US); 4. E. D. Ball (CPS); 5. J. G. Cooper 
(US 344379). 
Utan. Emery County: Green River, May, 1890, M. E. 
Jones (US); same locality, May, 1909, Z. D. Ball (CPS). Grand 
County: Grand River Canyon below Moab, July, ro11, collector 
_ hot given (NY). Kane County: Kanab, Mrs. A. P. Thompson 
( Washington County: St. George, Apr., 1880, M. E. Jones 
1657 (NY, RM, T, US); same locality, Apr., 1884, M. E. Jones 
5110] (US); Santa Clara Valley, Apr., 1884, M. E. Jones 5138 
(NY, UC, US). County not ascertained: southern Utah, 1872, 
2. 
