SYNOPSIS OF THE FLORA OF COLORADO. 9 



HESPERIS PALLASII, Torr. & Gray. FL X. Am. 2, p. 666. Sparsely 

 pubescent with closely appressed hairs fixed by the middle and acute at 

 each end, minutely scabrous under the microscope ; stems 3'-6' high, 

 from a fusiform root ; radical leaves numerous, linear or lanceolate-lin- 

 ear, sparingly toothed, I'-IJ 7 long, tapering into a petiole; raceme 

 short ; pedicels much shorter than the flowers; flowers large for the size 

 of the plant; upper cauline leaves linear; sepals oblong, obtuse, with 

 scarions margins, gibbous at base, 4" long ; petals with a long, broad, 

 pale-colored claw which exceeds the sepals ; limb round-obovate, purple; 

 anthers cordate at base ; ovary hairy ; stigma capitate, somewhat 2- 

 lobed. The blunt lobes of the capitate stigma, which do not connive, 

 separate this plant from the genus Hesperis. In all its other characters 

 it seems to accord well with the brief description of Pursh's Cheiranthus 

 PallasiL The specimens are in flower only, with no mature siliques. 

 Chicago Lakes at 12,000 feet altitude, June, Coulter. 



STANLEYA l PIISTS T ATLFIDA, Nutt. (8. integrifolia, James.) Stems 2 

 to 3 high, often several from one root; lower leaves ly rate-pin natitid 

 or nearly entire, large, sometimes minutely pubescent beneath ; upper 

 leaves entire, narrowed at the base into a slender petiole; filaments 

 very long and slender, pubescent below with a glandular enlargement 

 at the base ; siliques 2' long, somewhat torulose, twice longer than the 

 stipe. Hall & Harbour, 50; Coulter. Colorado City, Porter. 



^HELYPODIU^I rsTEGrRtFOLioi, Eudl. (Pachypodium, Xutt.) Stem te- 

 rete, smooth, 3-5 high, attenuated upward and sending out numerous 

 branches toward the summit ; leaves entire, radical ones petioled, ob- 

 long-elliptical, cauline lanceolate, sessile, uppermost nearly linear; 

 flowers almost corymbose, crowded, pale rose-color ; pedicels V long, 

 almost horizontal, twice as long as the calyx ; petals spatulate, obovate; 

 silique short, abruptly pointed, on a short stipe. South Park, July, 

 Porter. \Yet Mountain Valley, Brandcgee. Hall & Harbour, 51. 



THELYPODroi LiXEARLFOLiUM. Gr. (Streptanthus, Gr. PL Fendl., p. 

 7.J Very glabrous, 1 or more high, from an annual or biennial root 

 often branched from the base, erect, paniculate at the top ; leaves linear, 

 or the lower lanceolate, acutish, very entire, attenuate at base, sessile, 

 somewhat rigid, pale, lJ'-2' long; sepals turning purplish; petals obo- 

 vate, rose-purple, j' or less; claws scarcely twice longer than the lax 

 calyx; siliques erect, on spreading pedicels, very slender, teretish, 2' to 

 2.V long, apiculate with a very short style; valves carinate, 1-nerved; 

 seeds oblong, without margins. Canon City and Wet Mountain Valley, 

 Brandegee. 



THELYPODIUM \VRIGHTII, Gr. PL Wright 1, p. 7. Stem 2-3 high, 

 from a biennial or annual root; leaves broadly or narrowly lanceolate, 

 2' to 4' long, repaud-dentate or denticulate, all narrowed into a short 

 petiole; flowering racemes short and dense, fruiting raceme moderate- 



1 STAXLEYA, Xutt. Sepals long, spreading. Petals narrowed, elongated, with long 

 claws. Anthers twisted : siliques long-stipitate, slender, nearly terete, subcompres.sed ; 

 valves 1-nerved; style short or none; stigma simple. Seeds in one row, oblong, pendu- 

 lous: cotyledons incumbent. Perennial, glabrous, glaucous; flowers yellow, in long, 

 strict, many flowered, bractless racemes. Benth. ami Hook. 



- THELYPODIUM. Endl. Sepals elongated, equal at base, often colored. Petals long, lin- 

 ear, or with a plane lamina, unguiculate. Anthers linear. Silii[iie sessile or with a 

 very short thick stipe, linear, sub terete or somewhat compressed, torulose, not greatly 

 elongated: valves convex, subcarinately 1-uerved: style rather short: stigma nearly 

 entire. Seeds in one row, oblong, somewhat compressed, immarginate or scarcely mar- 

 gined; cotyledons more or less incumbent. Annual or perennial, with spicately 

 racerned bractless white or rose-colored flowers; slique 1 to 2$' long. S. Watson, 



