GAYOPHYTUM AND BOISDUVALIA. HI 



yarious numbers of 1859-60, in the Engelmann her- 

 barium, — these plants of leafy habit with more ample 

 foliage than usual, and less dichotomous, but too young 

 for satisfactory study), Idaho (Teton Foot Hills, Hayden 

 Expedition, 1872), and Utah (Parley's Park, Watson, July 

 1869,404). 



G. ramosissimum Torr. & Gray, Fl. i. 1840, 513. — A 



span to a toot or two high, intricately dichotomous with 

 filiform branches, glabrous, appressed canescent above, or 

 very exceptionally with spreading hairs throughout ; leaves 

 mostly narrow, usually less conspicuous than in the last, 

 often appressed against the branches; flowers small, the 

 petals 1 to 2 mm. long; stamens in two sets, the shorter 

 ones often with abortive anthers ; stigma larger, about .4 

 mm. in diameter; capsules about 1 mm. thick, oblong to 

 subclavate, often torulose, erect or refracted, on filiform 

 peduncles; seeds few, nearly erect in a single series, papil- 

 late, about .5X1. 3mm. (varying from. 38 to .80X.84 — 1.89 

 mm.), often abruptly dilated one-third above the base. 

 Washington to the Yellowstone, Arizona and Southern 

 California. 



Specimens examined from Washington (Brandegee, 1882, 

 280, and 1883, 781; Yakima Co., Henderson, May 

 30, 1892, 2463, and Aug. 3, 1892, 2464; Falcon Valley, 

 Suksdorf, Aug. 2, 1881, 20, and Sept. 2, 1881, 13; North 

 Branch of the Columbia, Wilkes Exped. 1838-42, 1052), 

 Oregon (Geyer, 4 and 547; Hall, 1871, 183; Howell, 1880; 

 John Day Valley, Howell, May 12, 1885; Stein's Moun- 

 tain, Howell, June 1, 1885), Idaho (Kootenai Co., Sand- 

 berg, July 1892), Montana (Birch Lakes, Canby, Aug. 8, 

 1883, 133), Yellowstone Park (Miss Cooley, June 1891, 

 4), Kocky Mountains (Nuttall; Hall and Harbour, 1862, 

 172 for the most part), Black Hills of the Platte (Hayden), 

 Colorado (Central City, Letterman, 1885; Palmer Lake, 

 Miss Eastwood, 1890; Sierra Mojado, Brandegee, June 



1877; Fremont Co., Brandegee, 1872, 450; Golden, Greene, 

 1870; Parry, 1872; Clear Creek, Parry, 1861-2, 124; 



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