SYNOPSIS OF THE FLORA OF COLORADO. 7 



raceme densely many-flowered ; flowers golden yellow; silicle mem- 

 branaceous, very smooth, equaling or a little longer than the style. 

 Canon City, August 13, 1872, in fruit, Brandeyee. Bluffs at Pueblo, 

 Greene. 



VESICARI A LUDOVICIANA, DC. Canesceut with a stellate pubescence ; 

 stem 6'-8' high, simple or somewhat branched above ; radical leaves 

 spatulate, entire, obtuse, cauline linear ; flowers golden yellow ; petals 

 obovate ; style slender, longer than the ovary and nearly as long as the 

 obovate, globose, hairy silicle. Platte Eiver near Denver, Dr. Smith ; 

 Coulter. 



YESICARIA MONTANA, Gr. Proc. Acad. Phil, March, 1863, p. 58. 

 Silvery canescent; stems spreading from a perennial root, leafy; leaves 

 spatulate; the radical subovate, petioled, sometimes 1-2 toothed; fruit- 

 ing raceme elongated, silicle oval or ellipsoidal, whitish-pubescent, 

 a little longer than the slender style, a little shorter than the upwardly 

 curving, spreading pedicel. Well marked by the oval or oblong silicle, 

 in some specimens 3" long but scarcely half that breadth, hoary with a 

 fine stellate pubescence; seeds 4 or 6 in each cell, wingless; petals 

 spatulate, light yellow; filaments filiform. Hall & Harbour, 49; B. H. 

 Smith; Meehan; Porter. Found in the mountains at middle elevations. 



PHYSARiA 1 DIDYMOCARPA, Gr. (Vesicaria, Hook.) Canescent with a 

 stellate pubescence; radical leaves broadly obovate-spatulate, occasion- 

 ally lyrate, cauline spatulate-lanceolate, mostly entire ; silicjues large, 

 globose-didymous, deeply emarginate above and below. A low, de- 

 cumbent, profusely branched perennial. Flower showy; petals oblong- 

 spatulate, exceeding the oblong sepals ; silicles varying in size, the lobes 

 usually approximate, sometimes considerably divergent; septum lance- 

 olate. Hall d; Harbour, 47 5 Dr. Smith; B. H. Smith. Long's Peak, 

 May 27, Coulter. 



DRABA ALPINA, L. Eather rigid ; scapes naked, mostly some- 

 what hirsute ; leaves spatulate-lanceolate, plane, more or less pilose 

 with branching hairs; petals yellow, more than twice the length of the 

 calyx : silicles somewhat corytubed, oblong-elliptical ; style very short. 

 Dwarf, I"-! 7 high: alpine and subalpine. very variable. Mount Lincoln 

 at 13,000 feet altitude, July, iu flower, Coulter. Gray's Peak at 12,000 

 feet, Red field. 



DRABA ArREA, Vahl. More or less pubescent; stem erect, leafy: 

 leaves lanceolate or ovate-lanceolate, entire or toothed; corymbs ter- 

 minal and axillary; silicles oblong-lanceolate, pubescent, exceeding the 

 pedicels; petals yellow, emargiuate; style rather short. Variable. In 

 the mountains from 7-14,000 feet altitude. Hall & Harbour, 44; Dr. 

 Smith; Heehan ; Brandeyee; Coulter. Gray's Peak, Reel field. 



DRABA STREPTOCARPA, Gr. SUl Jour. 1862, vol. 33, p. 13. A span 

 high; radical leaves rosulate, spatulate-lanceolate, acutish, attenuated 

 into a large-margined petiole, J'-l.V long, cauline about ', oblong or ob- 

 long-lanceolate, very entire, sessile ; hairs simple or simply forked, long, 

 rigid, shaggy, spreading; racemes often paniculate, many-flowered; pe- 

 tals golden yellow, twice longer than the calyx, mostly retuse or emar- 

 ginate; style a little shorter than the ovary; stigma emarginate, cap- 

 itate; fructiferous pedicels 3" long, more or less spreading; silicles J'--' 

 long, linear or oblong-ovate, minutely or strongly hispid-ciliate, usually 

 much twisted, turns often 3-4; style long, $"-2". Easily distinguished 



'PHYSAKIA, Xutt. Characters as iu Vesicaria, except that the silicle is didymous, 

 much inflated, nieinbran.aeeous, and the cotyledons contrary to the narrow septum. 



