212 University of California Puhlications in Botany [Vol. 10 



Localities. — Barnwell, K. Brandegee, May, 1911 (type in U.C. 

 Herb.) ; Providence Mountains, T. S. Brandegee, June, 1902; Mohave 

 Desert, New York Mount ians, Jepson 5461. Nevada: Karshaw, 

 Meadow Valley Wash, Goodding 626. These plants differ in many 

 respects from Hosackia rigidia var. numwuUiria Jones (Proc. Calif. 

 Acad. Sci., ser. 2, vol. 5, 1895, p. 633) as represented by Jones' 5128, 

 Santa Clara Valley, Utah. In the latter the internodes are long, the 

 leaves above the basal ones with 1 to 3 leatlets; leaflets linear-ovate, 

 acute, the terminal one over 2 cm. long ; bract usually present, also 

 linear-ovate ; flowers 1.2 to 1.4 cm. long ; legumes 2 to 3 cm. long, 

 3 to 4 mm. wide, yellowish brown. Jones' 5()98d, ten miles south of 

 Black Rock Spring, Arizona, and 5125d, Diamond Valley, Utah, are 

 immature plants and one cannot determine with certainty whether or 

 not their fruits and uppermost leaves would, if mature, resemble those 

 of Jones 5128. I have not seen Jones' 5224k, Rockville, Utah, the 

 first of the four specimens cited by Jones following his diagnosis of 

 Hosackia rigida var. nummularia, but assume that it corresponds to 

 the other three plants. 



References. — Lotus w^rightii Greene, Pitt., vol. 2, 1890, p. 143. 

 Hosackia ivrightii Gray, PI. AVright., vol. 2. 1853, p. 42, type loc, 

 stony hills at the copper mines, New Mexico, Wright 1000. A7iisolotus 

 wrightii Rydb. in Bull. Torr. Club, vol. 33, 1906, p. 144. 



10. L. argyraeus Greene (pi. 70, figs. 14-22). Prostrate, much 

 branched, woody perennials, with dense silky pubescence on the leaves, 

 young stems, and calyces ; internodes short ; leaves often broader than 

 long, with very short petiole and rachis; leaflets 3 to 5, cuneate- 

 oblanceolate or cuneate-obovate to rounded-deltoid, mostly obtuse; 

 umbels ebracteate, 1 to 3-flowered ; peduncles exceeding the leaves ; 

 flowers 8 to 10 mm. long, the subulate calyx teeth a little more than 

 one-half as long as the tube; legumes variable, 1 to 2.2 cm. long, 

 2 to 4 mm. wide, silky-pubescent to glabrate, 2 to several-seeded; 

 seeds oblong-spherical, smooth. 



Dry situations, San Bernardino Mountains, south into Lower Cali- 

 fornia. Upper Sonoran and Transition. Distribution Map 3. May- 

 September. Closely allied to L. mearnsii Britt. of Arizona and to 

 Hosackia nivea Wats, of Lower California. 



Localities.— ^ai[iis. Ana River (about 6500 ft. alt.), Peirson, 2266; 

 Holcomb Valley, Parish Bros., 1495; Holcomb Valley, San Bernar- 

 dino Mountains, Parish 10887 ; Bear Valley, San Bernardino Moun- 

 tains, Parish 3741; Green Valley, San Bernardino Countv, Ahrams 

 2060 ; Rose Mine, Parish 3094, 3097 ; Coyote Canon, Santa Rosa Moun- 

 tain, San Jacinto Mountains, Hall 2140; Coyote Canon near El Toro. 

 Jepson 1440 ; Santa Rosa Mountain, twenty-five miles south of Palm 

 Springs, Hall, August, 1897. Lower California: Cantillas Mountains, 

 ten miles from Tres Pozos, Palmer 100, 



References. — Lotus argyraeus Greene, Pitt., vol. 2, 1890, p. 144. 

 Hosackia argyraea Greene, Bull. Calif. Acad., vol. 1, 1885, p. 184, 

 type loc. in the Cantillas Mountains, Lower California, Orcutt. 

 Anisolotus argyraeus Ileller, Muhl., vol. 8, 1912, p. 47. 



