[Vol. 9 



316 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



or broadly linear, about 5 mm. long; petals oblanceolate, short- 

 clawed, exceeding the sepals at least one-half; filaments slightly 

 tetradynamous, linear, 5-7 mm. long, folded in the bud, anthers 

 about 2 mm. long, not apiculate; nectar glands well developed: 

 inflorescence in flower corymbose, elongating in fruit; pedicels 

 slender, horizontal or divaricate-descending, 5-10 mm. long: pods 

 widely spreading, terete, torulose, stipe 0.5-2 mm. long; style 

 rarely over 1 mm. long, stigma entire: seeds not winged; coty- 

 ledons obliquely incumbent or nearly accumbent. 



Distribution: western Texas, southern and western Colorado, 

 New Mexico, southern Utah and Nevada, Arizona and north- 

 western Mexico. Type: Wright, pass of the Limpio, western 



Texas. 



Specimens examined : 



Colorado: Webster Canyon, July 25, 1872, Redfield 418 (Mo. 

 Bot. Gard. Herb.); Canyon City, 1871, Brandegee 351 (Univ. 

 Calif. Herb.) ; Trinidad, Sept. 2(1, 1913, Rose & Fitch 17515 (Mo. 

 Bot. Gard. Herb.) ; Trinidad, July 20, 1918, Osterhout 5755 (Rky. 

 Mt. Herb.); San Luis Valley, Sept., 1875, Brandegee (Mo. Bot. 

 Gard. Herb.) ; Pitkin County, July 20-30, 1000, Mann (Mo. Bot. 

 Gard. Herb.) ; Durango, July 18, 1898, Baker, Earle & Tracy 510 

 (Mo. Bot. Gard. Herb, and Rky. Mt. Herb.). 



New Mexico: White Mountains, Lincoln County, July 22, 

 1897, Wooton 194 (Rky. Mt. Herb, and Mo. Bot. Gard. Herb.); 

 Gray, Lincoln County, July 22, 1898, Skehan 42 (Mo. Bot. Gard. 

 Herb.); Gray, Lincoln County, July, 1900, Earle & Earle 158 

 (Mo. Bot. Gard. Herb.) ; Organ Mountains, Oct. 18, 1903, Woo- 

 ton (Rky. Mt. Herb.); Mogollon Mountains, Aug., 1881, Rusby 

 26 (Mo. Bot. Gard. Herb.) ; Mogollon Mountains, Aug. 5, 1903, 

 Metcalfe 385 (Mo. Bot. Gard. Herb, and Rky. Mt. Herb.) ; Tula- 

 rosa Creek, Sacramento Mountains, Aug. 20, 1899, Wooton (Mo. 

 Bot. Gard. Herb.); on mountains at the Copper Mines, Aug., 

 1851, Wright 845 (Mo. Bot. Gard. Herb.) ; near Silver City, July 

 18, 1SS0, Greene (Mo. Bot. Gard. Herb.). 



Utah: Cane Spring Mountains, May-Oct. 1898, Purpus 6231 

 (Rky. Mt. Herb, and Univ. Calif. Herb.). 



Arizona: Prescott, Oct. 28, 1917, Bethel (Bethel Herb.) ; Pres- 

 cott, Aug. 28, 1894, Tourney (Univ. Calif. Herb.) ; Pigeon Creek, 

 Aug. 4, 1912, Goodding 1276 (Rky. Mt. Herb.). 



Nevada: Calientes, May 24, 1902, Goodding 945 (Rky. Mt. 

 Herb, and Mo. Bot. Gard. Herb.). 



