SYNOPSIS OF THE FLORA OF COLORADO. 119 



AMARANTACE.E. 



. 



AMAR ANTUS RETROFLEXUS, L. CaQon City, Brandegee. Plains aroimd 

 Denver, Coulter. Introduced. 



AMARANTHS ALBUS, L. Plains around Denver, Dr. Smith. Canon 

 City, Brandegee. 



MONTELTA TAMARISCINA, Gr. Around Denver, Dr. Smith; B. H. 

 Smith. Canon City, Brandegee. 



FRCELICHIA FLORID AN A, Moq. Around Denver, Dr. Smith. " Sand 

 bills on the plains," Hall & Harbour. 487. 



PARONYCHIEJE. 



PARONYCHIA PULVINATA, Gr. Proc. Acad. Phil, March, 1863, p. 58. 

 Matted-ca?spitose from a woody root, forming dense cushion-like tufts, 

 nearly glabrous, occasionally sending out short nearly naked pubescent 

 stems; stipules silvery, broadly ovate, entire, pointless, the uppermost 

 somewhat acute but blunt, 2" 'long; leaves thick, oblong, obtuse, cilio- 

 late-scabrous upon the margin and somewhat minutely glandular-pubes- 

 cent, 2J"-3" long and V wide, bright green and nerveless, equaling the 

 stipules and with them densely covering the short stems; flowers im- 

 mersed among the leaves, solitary, terminal, sessile ; sepals oval, broadly 

 scarious, awned a little below the somewhat arched apex ; stamiiiodia 

 5, similar to the fertile filaments ; ovary glabrous, tapering into the 

 rather short style. Alpine. Hall it Harbour, 66; Parry, 297. Mount 

 Lincoln, at 13,000 feet altitude, Coulter. 



PARONYCHIA SESSILIFLORA, Kutt. Eoot woody, very densely csespi- 

 tose, much branched and crowded : branches very dense, 2' high ; leaves 

 imbricated, linear-subulate, lowest erect, obtuse, the upper longer, re- 

 curved-spreadiug, acute or mucrouate, rather longer than the 2-cleft 

 stipules; flowers terminal, solitary, sessile; sepals arched at the apex 

 within, with divergent setaceous awns rather shorter, oblong-linear, ob- 

 scurely 3-uerved ; sterile seta? as long as the filaments ; style as long as 

 the se'pals, 2-cleft at the apex. South Park, Canby. Wet Mountain 

 Valley, Brandegee. 



PARONYCHIA JAMESII, T. & G. Very minutely scabrous-pubescent, 

 ca^spitose, much branched from the base, stems 4M5' high ; leaves linear- 

 subulate, obtuse, ' long, about the length of the iuternodes, uppermost 

 mucronate ; stipufes shorter than the leaves, ovate-lanceolate, acuminate 

 or setose; cymes dichotomous, few-flowered, crowded, with a central, sub- 

 sessile flower in each division; sepals minutely hairy at the base, linear- 

 oblong, obscurely 3-ribbed. with very short cusps, arched at the summit 

 within ; sterile seta? as long as the filaments ; style 2-cleft one-third of 

 its length. Hall & Harbour, 67. South Park, Canby. Abundant at the 

 base of the foot-hills near Colorado Springs, Porter. 



POLYGON lACEJE. 



ERiOGONOi 1 ALATUM, Torr. Sitc/reares' Rep., p. 168, t. 8. Perennial; 

 root stout and blackish ; stem erect, i-3 high, arising from a short, thick 



1 ERIOGONUM, Miehx. Involucre many-rlowered. (seldom few, or very rarely 1-flow- 

 ered,) campanulate. top-shaped, or cyliiidric. usually 5-8-toothed or lobed, pointless. 

 Flowers jointed upon their pedicels, which are more or less exserted from the involu- 

 cre in flower ; bractlets usually very delicate or very narrow. Calyx 6-parted or 

 deeply 6-cleft. Stamens 9. Achenmm triangular, or in a few species 3-winged. 

 North American herbs or undershrnbs. mostly west of the Mississippi. 



