38 SYNOPSIS OF THE FLORA OF COLORADO. 



POTENTILLA FRUTicosA, L. Very common along the foot-bills and 

 among the mountains. Hall & Harbour, 155. Near Denver, B. H. 

 Smith; Median. South Park and Sierra Madre Eange, Coulter. 



POTENTILLA ANSERLNA, L. Common everywhere on the plains and 

 in the mountains. Denver, Dr. Smith. Colorado Springs, Porter. Canon 

 City, Brandegee. South Park, Coulter. 



EOSA -BLAND A, Ait. Common everywhere along streams in the foot- 

 hills. Dr. Smith; Meehan. Porter ; Brandegee; Coulter. 



EOSA ARKANSANA, Porter (n. sp.) Stein stout, erect, leafy, 1 high, 

 glabrous and glaucous, armed with weak, deciduous, bristly prickles ; 

 leaflets 9-11, ovate and oblong-ovate, 1 'or more in length, acute or obtuse, 

 glabrous, sharply serrate; midrib and long stipules somewhat prickly 

 and minutely glandular; flowers numerous, terminal, corymbed, on 

 peduncles about I' long; fruit globose, smooth, glaucous; calyx-seg- 

 ments ovate, reflexed in fruit, with terminal and sometimes lateral 

 appendages, more or less glandular and tomentose pubescent on the 

 margins; petals broadly obcordate or emarginate, longer than the calyx- 

 segments, rose-color^ flowers 2" in diameter. This rose may possibly be 

 an extreme form of H. blanda, but it differs in so many points that I have 

 ventured to describe it as new. Banks of the Arkansas near Canon 

 City, Brandegee. Eaton Mountains, Dr. Bell. Texas, Wright. 



EOSA FRAXINIFOLIA, Bork. Eesembles E. blanda. Flowers large, 

 3' in diameter; fruit larger, 6' to h' in diameter ; 2 to 3 higb, growing 

 solitary on dry ridges. In the mountains, Hon. John Scott. 



PYRUS SAMBITCIFOLIA, Cham. & Schlecht. Meehan. 



AMELANCHIER CANADENSIS, T. & G., var. ALNIFOLIA, T. & G. 

 Mountain of the Holy Cross, Coulter. 



SAX1FRAGACE.E. 



SAXIFRAGA C^SPITOSA, L. Perennial, dwarf, crespitose ; stems, l'-2' 

 high ; leaves glandular- pubescent, 3-5-eleft, upper linear and entire, 

 segments broadly-linear and obtuse ; flowering stems with a few scat- 

 tered leaves, glandular, 1-4-flowered; petals white, obovate. 3-nerved, 

 scarcely longer or twice the length of the calyx. Alpine. Hall & Har- 

 bour ; Parry. 



SAXIFRAGA RivuLARis, L. "Eocky Mountains of Colorado," Watson 

 in Kintfs Rep., vol. 5, p. 93. 



SAXIFRAGA ADSCENDENS, L. (S. controversa, Sternb.) Annual, glan- 

 dular-pubescent; stems r-3-higb; erect, leafy; leaves cuneate-ovate, 

 3-5 toothed at the apex, the earlier spatulate and entire, radical ones 

 crowded; branchlets 3-flowered; flowers pinkish or yellowish-white; 

 calyx-lobes ovate, obtuse, shorter than the petals ; pedicels bibracteate, 

 about equaling the fruit. " Alpine region," Hall & Harbour, 196. 



SAXIFRAGA CERNUA, L. Annual, glabrate or glandular-pubescent; 

 steins granulate at base, leafy, weak, simple or branching, 2'-5' high, 

 lower leaves reniform, broadly toothed or lobed, the upper ones bearing 

 little bulbs in their axils; flowers often solitary, terminal, pendulous ; 

 sepals oblong or ovate, nearly distinct; petals obovate-obloug or obovate 

 and retuse, white or cream-color, longer than the calyx; styles imperfect 

 or deformed. Alpine. Mount Lincoln at 12,500 feet altitude, Coulter. 

 Meehan. Saugre de Cristo Pass, Brandegee. 



SAXIFRAGA DEBILIS, Eng. Glabrous/ or very sparingly glandular 

 pubescent; stems weak, ascending, 2-4-flowered, 2'-4/ high ; radical 



