366 LEOUMINOSAE 



calyx-tootli sotacpous. •'^4 as lonpr as tiibo; corolla pa\e blno; pods narroAvly oblonpr, 

 stronjxly llattencd contrary to the partition, stronjjjly curved or croscent-sliaped, 

 dorsally pfrooved. acuininately beaked, 1-celled, glabrous or scantily puberulent, 

 mottled. % to 11^ inches lonpr. 



.Montane valleys or slopes, 5000 to 6000 feet: valleys east of the Sierra Nevada 

 crest in Sierra Co., rare. East side of the Sierra Nevada from Washoe Co., Nev., 

 to Esmeralda Co., Nev. June (fr.). 



Loci?.^ — Sicrni Vallcj- (Bot. C:il. 1:154). Nevada: Kono, IliUman ; Hunter Creek, Washoe 

 Co., Kennedy 1600; Miller Mt., Esmeralda Co., Shocklcy 300; Tonopah, Shocklcy 3. 



Refs. — Astragalus iodanthus Wats. Bot. King 70 (1871), type loc. Virginia City, Nev., 

 Bloomer ^- Torrey; Jepson, Man. 570 (1925). Tragacantha iodantha Ktze. Eev. Gen. PI. 2:945 

 (1891). XyJophacos iodanthus Rydb. Bull. Torr. Club 52:144 (1925). 



37. A. gibbsii Kell. Lassex Sickle. Stems rather stout, branchinpr, 1 foot 

 hip:h; her])a<re Avitli a short spreading pubescence, often grayish; leaves 2V2 to 3l^ 

 inches long; leaflets 15 to 21, obovate, retuse or obcordate, 3 to 7 lines long; flowers 

 yellowish-white, 6 to 9 lines long, numerous in dense racemes, borne on peduncles 

 exceeding the leaves; cah^-teeth triangular, I/3 to 1/4 the length of the oblong- 

 campanulate tube; pods sub-cylindric, somewhat curved, 1-celled, pubescent or 

 subglabrate, %^ to 1 inch long, 2 to 3 lines w4de, on a stipe 6 to 7 lines long. 



Mountain slopes, 4000 to 5000 feet : summits and eastern slopes of the northern 

 Sierra Nevada from Alpine Co. to Lassen Co. Western Nevada to Oregon and 

 Idaho. ]\Iay-June. 



Locs. — Red Clover Creek, Plumas Co., Hall 4' Babcock 4448 ; Milf ord, Lassen Co., T. Brande- 

 gee; Amedee, Lassen Co., Jones. Nevada: Reno, Hillman; Kings Canon, Ormsby Co., C. F. 

 Baler 1035. 



Var. falciformis Jones. Plants taller ; pubescence shorter ; pods 1% to 2 lines wide, strongly 

 curved, forming a V2 to % or even complete circle, glabrous or nearly so, the valves often con- 

 spicuously veiny. — Northeastern California, from Lassen Co. to Modoc Co. and Siskiyou Co. : 

 Honey Lake, T. Brandegce ; Fall River Mills, Shasta Co., Rail 4" Babcoclc 4252; Forestdale, sw. 

 Modoc Co., M. S. Baker ; Ager, Siskiyou Co., it. Brandegee. North to Oregon. 



Refs. — Astragalus gibbsii Kell. Proc. Cal. Acad. 2:161 (1862), type loc. near headwaters 

 of Carson River, Alpine Co., Gihhs; Jepson, Man. 571 (1925). Tragacantha gibbsii Ktze. Rev. 

 Gen. PI. 2:945 (1891). Homalobiis gibbsii Rydb. Bull. Torr. Club 51:15 (1924). Astragalus 

 cyrtoides Gray, Proc. Am. Acad. 6:201 (1864), type loc. Clear Water River, Wash., Spalding. 

 Homalobus plummerae Rydb. Bull. Torr. Club 51:16 (1924), type loc. Sierra Co., probably 

 Sierra Valley, Lemmon; this is clearly a synonym as evidenced by the type spm. (N. Y. Bot. 

 Gard.). Var. falciformis Jones, Contrib. W. Bot. 8:23 (1898). A. speirocarpus Gray var. 

 falciformis Gray; B. & W. Bot. Cal. 1:152 (1880), type loc. Sierra Co., Lemmon. A. speirocarpus 

 var. curvicarpus Sheld. Minn. Bot. Stud. 1:125 (1894). A. gibbsii-var. curvicarpus Jones, Contrib. 

 W. Bot. 10:62 (1902). A. whitedii Piper, Bull. Torr. Club 29:224 (1902), type loc. Colockum 

 Creek, se. of Wenatchee, Wash., K. Whited 1353. A. curvicarpus Mcbr. Contrib. Gray Herb. 

 65:38 (1922). Homalobus curvicarpus Hel. Muhl. 2:86 (1905). H. whitedii Rydb. Bull. Torr, 

 Club 51:16 (1924). 



38. A. collinus Dougl. var. califomicus Gray. Shasta Loco. Stems com- 

 monly several from a stout woody base, % to 2 feet high; herbage pubescent, becom- 

 ing glabrate; leaves 1 to 2V2 inches long; leaflets 13 to 19, oblong, emarginate, some- 

 times merely obtuse, acute at base, 3 to 7 lines long; racemes short, the peduncles 

 surpassing the leaves; flowers yellowish, 5 to 6 lines long; calyx -teeth triangular- 

 subulate, 14 to 1/3 as long as the tube; pods linear, sub-cylindric, straight, 11 to 18 

 lines long, 1-celled, glabrous or puberulent, often purplish-mottled, spreading hori- 

 zontally, tapering to a stipe 3 to 9 lines long. 



Montane, 1000 to 2700 feet : valleys and cailons about Mt. Shasta, Siskiyou and 

 Shasta Cos. ]\Iay-June. 



Locs. — Hornbrook, Howell; Humbug Mt., Siskiyou Co., Butler 593, 1284 (pods veined, 

 puberulent) ; Cherry Creek, Siskiyou Co., Butler 393 ; betw. Igerna and Weed, Siskiyou Co., 

 Heller 8082 (pods not veined, puberulent) ; Gregory, upper Sacramento River, Shasta Co., Hall 

 Sf Babcock 4016 (pods veined, glabrous). 



