SYNOPSIS OF THE FLORA OF COLORADO. 21 



TRIPOLIUM NANUM, Torr. Glabrous, csespitose, caudex short and thick, 

 branching, 1/-2' high ; leaflets ovate oblong, somewhat acuminate, den- 

 ticulate, strongly veined, on rather long petioles; stipules membrana- 

 ceous, ovate, cuspidate; peduncles very short, radical; uinbellately about 

 3-flowered; flowers large, J' long, dark purple, scarcely unfolding; calyx 

 tubular-campanulate, glabrous, teeth nearly equal, triangular-subulate, 

 shorter than the tube; vexillum broadly obovate, 3-times the length of 

 the calyx; legume 4-5-seeded. Alpine. Hall & Harbour, 99; Parry; 

 ' Brandeyee. Mount Lincoln at 14,000 feet altitude, Coulter. 



TRIFOLIUM DASYPHYLLUM, T. & G. Denselycoespitose; caudex short 

 and thick, branching, 2'-4' high ; leaves, peduncles, and calyx more or less 

 cauesceutly silky ; leaflets linear, oblong-lanceolate, acute or acuminate, 

 entire; stipules membranaceous, lanceolate, subulate-acuminate; head 

 globose, on a long radical peduncle, bracteate, V in diameter ; bracts 

 lanceolate, scarious-inargiued, unequal ; teeth of the calyx setaceous, 

 nearly equal, exceeding the tube and a little shorter than the corolla; 

 corolla 4"-6 // long, scarcely unfolding; legume 3-4-seeded. Alpine. 

 Hall cO Harbour, 97 ; .Parry, Median. Sangre de Cristo Pass, Brande- 

 gee. Mount Lincoln, Mount La Plata and Gray's Peak at 12,000 feet 

 altitude, Coulter. 



TRIFOLIUM PARRYI, Gr. Sill. Jour. (JV. 8.) 33, p. 409. Glabrous, circu- 

 lose, subcaulescent ; scape 3'-4' high, leafy at base ; stipules ovate, 

 scarious; leaflets oblong, (J-1J",) sharply dentate ; involucre scarious, 

 5-7-parted, much shorter than the many-flowered head ; segments ovate, 

 obtuse; calyx about thrice shorter than the persistent, rose-purple 

 (G"-9") corolla, teeth broadly-subulate, about equaling the campauulate 

 tube ; flowers 20 or more in a head ; legumes sessile, 3-4-seeded. Al- 

 pine. Hall c(; Harbour, 98; Parry; Median. Common on the higher 

 mountains, Coulter. Gray's Peak at 11,000 feet, Eedfield. 



TRIFOLIUM INVOLUCRATOI, AVilld. Xearly erect, glabrous ; slender, 

 branching from the base, 10'-18' high ; leaflets linear-lanceolate, mucro- 

 nate, spiuuosely-serrulate, l'-l J' long]; stipules membranaceous, oblong- 

 ovate, aristate, the upper ones pectinately dentate with setaceous 

 teeth; the. lowermost narrower and nearly entire ; involucre laciniately 

 many-cleft, a little shorter than the rather loose subheniispherical heads ; 

 heads V or more in diameter ; flowers purple, tipped with white ; teeth 

 of the calyx longer than the tube and much shorter than the corolla, 

 subulate from a very broad base ; legume stipitate, 5-G-seeded. Fremont 

 County, Brandegee. 



HOSACKIA l PuRsniANA, Beuth. Much-branched, G'-2 high, annual, 

 erect, more or less hairy, sometimes softly villous; leaflets 3, (rarely 4,) 

 ovate to lanceolate, rather acute; stipules minute, blackish; peduncles 

 longer than the leaves, 1-flowered; bract simple; calyx deeply parted ; 

 corolla 3"-4" long, scarce exceeding the calyx, keel attenuated upward, 

 falcate ; petals rose-colored, the vexillum with deeper minute stripes ; 

 legume V or more long, straight, not attenuate above. Hall ct Har- 

 bour, 108. 



PSORALEA LAJS T CEOLATA, Pursli. Nearly glabrous, with a few scat- 

 tered hairs and numerous dark-colored glands, erect, 1 high, much 



1 HOSACKIA, Dougl. Calyx tubular or somewhat campauulate, 5-cleft or toothed- 

 Vexillum as long- as the spreading wings, often distant from those of the other petals- 

 Keel as long as the vexillum. Style subulate, usually somewhat straight. Stigma 

 capitate. Legume somewhat compressed, wingless. Herbs or stitirutescent plants (all 

 American.) Stipules very minute, sometimes foliaceons. Peduncles axillary or um- 

 bellately 1-3 many-flowered; commonly with a 1-3-foliolate bract below the flowers. 

 Torr. &QT. n. X. 'Am. 



