August 26, [910 69 



Lupinus lacteus Kellogg, Proc. Cal. Acad. .">: 37. [873. 



Litpiiuts arenicola Heller, Muhlenbergia '£: 75. 1905. 



"Stem annual, fistulous, the elongated central peduncle from 

 .1 mere depressed crown, mostly solitary, spike 4 to 8 inches 

 long, lateral radicle branches 2 to 6 inches long, with secondary 

 clusters of leaves and (when present) shorter spikes, soft pubes- 

 cent throughout, with white hairs. Leaves mostly clustered at 

 the base, petioles membraneously expanding toward insertion 

 and conspicuously 3-nerved, stipules adnate, subulate; leaflets 

 6 to 10, '_. to 1 inch in length, or about one-third the petiole, 

 complicate-carinate, arcuate, spatulate, obtuse and slightly re- 

 tuse, attenuate at base, sparsely appressed pubescent above near 

 the margins, glabrous toward the midrib, silky-pubescent be- 

 neath, colored at the point of insertion. Flowers large, white, 

 somewhat distant, verticillate, chiefly by sixes, pedicels short, 

 rather more than half the length of the persistent, subulate 

 bracts; calyx ebracteolate, hirsute, scarious chiefly above, upper 

 lip 2-cleft (rarely entire), about one-third the length of the lower 

 lip, lower lip straight, herbaceous, 2-toothed, about )± of an 

 inch long; vexillum glabrous on the back, ciliate at the margi- 

 nal junction of the claw, face marked by a row of dark oblong 

 spots along each side of the central fold, (rarely a few scattering 

 dots,) banner, wings and keel about equal, wings oblong, obtuse, 

 somewhat spatulate, about equal, margins ciliate at the base or 

 origin of the claw; keel ciliate at the upper inside margin toward 

 the base, acute. Legume very hirsute, 2-seeded. 



'•In habit and general appearance this species resembles L. 

 brevicaulis, but is rather more robust, the flowers much larger 

 aid not "deep bin ■," but quite w'litc; beside-, the truncate tipper 

 lip is a peculiar distinguishing feature of that species — that has 

 bracteoles on calyx, this none, etc. It is closely allied to L. 

 Memiesii, but the relatively shorter pedicels, and much longer 

 petioles, and both lips lacking the "entire" character and rela- 

 tive proportion, would strongly tend to exclude it; admitting 

 L. densiflorus to be the same as /.. Memiesii, "with variations," 

 it would then bring us a "dense, subsessile spike." an emargi- 

 nate upper lip, and ^-toothed lower one, with which to contend. 



