282 UEGUMINOSAE 



little upciirved ; pods oblong. 5 to 8 lines lonp:. 3 to 4 lines uide, smooth or scaly on 

 the sides, hirsute on the marfrins ; ovules 2 to 6. 



Sandy flats or valleys, 2000 to 4000 feet : Mohave Desert and north to Inyo Co. 

 East to Nevada and Arizona. Apr.-June. 



Field note. — A purple color, unusually rich, characterizes the petals of Lupinus odoratus. 

 The spot on the banner may be either white or yellow ; it is very sharply defined in either case, 

 especially so when white. The flowers are not obviously fragrant. A desert adaptation is sho'mi 

 in the fleshy-thickened bases of the stems and petioles as water reservoirs. 



Locs. — Antelope Valley, Davy 2223; Pallett Creek, n. slope San Gabriel Mts., Peirson 2477; 

 Hesperia, Parish 3774; Mohave sta. (15 mi. e.), Jcpson 15,438; Amargo, Jepson 15,779; Kramer, 

 Jepson 5348; Ord Mt., Jepson 15,517; Barstow, Mary Beal; Calico Wash, Jepson 5818; Calico 

 Mts., Jepson 5404 ; Eandsburg; Big Pine, Inyo Co.; Bishop, Inyo Co., Shockley 424a. 



Note on variations. — The variant Lupinus rubens ITcl. is intermediate between L. pusillus 

 Pursh and L. odoratus Hel. ; it is very close to the variant L. flavoculatus Hel. This latter form 

 has the calyx glabrous save that the lips are thinly hirsute ; sometimes on the one plant occur 

 also calyces with a few hairs on the calyx-tube as well as on the lips, which condition describes 

 L. rubcus Hel. We cite as var. flavoculatus Jepson comb, n.: .South Fork Korn River, Pnrpns 

 5714; Barnwell, K. Brandegee ; Wild Eose Spr., Panamint Range, Parish 10,259; Lone Pine, K. 

 Brandegee. The first and last cited spms. simulate L. brevicaulis Wats, closely and doubtless 

 have an intimate affinity. We cite as var. rubens Jepson comb. n. (herbage except upper surface 

 of leaves hirsute and more or less pubescent; calyx-lips and -tube both hirsute) : Devils Canon, 

 near Coachella, Clary. Var. pilosellus C. P. Sm. is another one of these slight forms, with 

 hairy herbage like L. pusillus, but the calyx hii'sute only on the margin of the lips. — Mohave 

 River, Palmer 84; Cima, Jepson 15,840. 



Refs. — Lupinus odoratus Hel. Muhl. 2:71 (1905), type loc. Kramer, San Bernardino Co., 

 Eeller 7673; C. P. Sm. Bull. Torr. Club 46:401, fig. 48 (1919) ; Jepson, Man. 519 (1925). Var. 

 FLAVOCULATUS Jepson. L. flavoculatus Hel. Muhl. 5:149, pi. 5 (1909), type loc. Rhyolite, Nye 

 Co., Nev., Keller 9669. L. rubens var. flavoculatus C. P. Sm. I.e. 46:404 (1919) ; Jepson, Man. I.e. 

 Var. RUBENS Jepson. L. rubens Rydb. Bull. Torr. Club 34:45 (1907), type loc. s. Utah, Parry 

 41; Jepson, Man. 519 (1925). Var. pilosellus C. P. Sm. I.e. 46:402 (1919), type loc. Nipton, 

 San Bernardino Co., E. Brandegee ; Jepson, Man. I.e. 



48. L. pusillus Pursh. Eusty Lupine. Stem short (I/2 to 1% inches), pro- 

 ducing a terminal raceme and later several or many flowering branches from the 

 lower axils, forming a congested or compact plant 3 to 5I/2 inches high; petioles and 

 stems rusty-pilose ; leaves surpassing the racemes ; leaflets 5, glabrous above, 6 to 

 11 lines long; petioles % to 1% inches long; racemes subsessile, dense to rather lax, 

 1 to 21/2 inches long; flowers not whorled, 3 to 4 lines long; bracts persistent; calyx 

 villous, the lower lip more than twice as long as the upper; petals bluish to whitish; 

 keel nearly straight, non-ciliate; pods oblong, 6 to 8 lines long, 2-seeded. 



Sandy plains or valleys, 4000 to 6000 feet : Inyo Co. ; Modoc Co. Eastern Wash- 

 ington to Nevada, Arizona and Colorado. May-July. 



Locs. — Deep Spring Valley, Inyo Co., Purpus 5807; Surprise Valley, e. Modoc Co. (Bull. 

 Torr. Club 46:409). 



Seeds. — The seeds of Lupinus pusillus are flattened, circular, with a somewhat cord-like 

 margin and rugulose on the sides. The seeds of L. shockleyi Wats, of western Nevada are 

 similar with some variation. L. odoratus has seeds similar to those of L. pusillus, but also exhibits 

 angular imflattened seeds. Those of L. brevicaulis are thick-lenticular and highly polished. 



Refs. — Lupinus pusillus Pursh, Fl. 468 (1814), t5T)e loc. "on the banks of the Missouri"', 

 ieu'W. Var. intermontanus C. P. Sm. Bull. Torr. Club 46:408 (1919) ; Jepson, Man. 519 (1925). 

 L. intermontanus Hel. Muhl. 8:87, pi. 12 (1912), type loc. Wadsworth, Churchill Co., Nev., 

 Eeller 9599, 



49. L. brevicaulis Wats. Sand Lupine. Plants 2 to 4 inches high, the stem 

 short (or shortly branched), Y^ to % inch high, the crowded leaves and peduncles 

 therefore basal or sub-basal ; herbage villous, the leaflets glabrous above ; leaflets 

 4 to 6 lines long; peduncles 1 to 2^/4 inches long; racemes subcapitate, l^ to 1^ 

 inches long, rather shorter than the leaves, or elongating after anthesis; flowers 

 2% to 3I/2 lines long, crowded; pedicels villous, Yo to 1 line long; calyx villous; 

 lower calyx-lip entire or slightly toothed, 1^ to 2 lines long, the upper lip very 

 short or almost obsolete (Y^ to Yi as long as the lower), membranous, truncate. 



