SYNOPSIS OF THE FLORA OF COLORADO. 93 



interrupted; cymes subsessile, few-flowered ; segments of tbe calyx lan- 

 ceolate, pubescent; tube of the corolla widened above, f long, less ven- 

 tricose than iu P. cristata ; beard of the sterile filament rather short, some- 

 what interrupted. a Plains; flowers white," Hall & Harbour, 389. 



PENTSTEMON CRIST ATUS, Niitt. Gr.Rev. I. c., p. 67. Viscid-pubescent; 

 lower leaves oblanceolate, petioled, upper ones oblong-lanceolate, sessile, 

 clasping, entire or denticulate ; panicle strict, with short, appressed, 

 3-4-flowered peduncles; sepals linear-lanceolate, attenuate, very hirsute; 

 corolla 1' long, violet, broadly funnel-form above the calyx, somewhat 

 bilabiate, the lower lips and sterile filament strongly bearded with long 

 hairs ; anthers glabrous, expanding. Canon City, Brandegee. Pueblo, 

 Greene. The specimens differ from the typical form in having much 

 narrower, sometimes almost linear leaves. 



PENTSTEMON PUBESCENS, Soland., var. GRACILIS, Gr. (P. gracilis, 

 Xutt.) Gratfs Rev. 1. c., p. 69. Nearly glabrous; cauline leaves and 

 thyrsus narrowed ; corolla usually more slender, not bearded. Canon 

 City? Brandegee. Colorado Springs and South Park, Porter. Monument 

 Park, Coulter. 



PENTSTEMON HUMILIS, Nutt. Gr. Rev., 1. c., p. 69. Glabrous below 

 and somewhat glaucous, minutely viscid-pubescent above, 3'-10' high ; 

 lower leaves spatulate or oblauceolate, the upper oblong or linear- 

 oblong, sessile and clasping; all acute or acuminate, usually entire, 

 occasionally somewhat serrulate ; peduncles rather short, appressed, 

 2-8-tiowered; sepals ovate-lanceoate, with usually a slender herbaceous 

 recurved acuminatiou ; corol las 4"-8" long, deep blue, dilating upwards, 

 somewhat bilabiate, throat open and without folds; anthers glabrous, 

 expanding; sterile filament yellow-bearded. "Low mountains; an early 

 species," Hall & Harbour, 387. Plains of the Platte, Dr. Smith. Clear 

 Creek Canon, Coulter. Canon City, Brandegee. 



PENTSTEMON GLATJCUS, Grah. Gr. Rev., 1. c., p. 70. Glabrous except 

 the viscid-pubescent inflorescence, -lJ high; leaves subglaucous, 

 denticulate or entire ; radical ones subovate, petioled, the. upper oblong- 

 lanceolate, dilated and clasping at the base; thyrse subcompact ; sepals 

 ovate-lanceolate; corolla I' long, widely and abruptly ventricose above 

 the base, the throat open and without folds, the lower lip slightly 

 longer and sparingly villous with long hairs, violet or lilac color ; anthers 

 glabrous and expanding ; sterile filament yellow-bearded. 



Yar. STENOSEPALTJS, Gr. Sepals lanceolate with a long slender acu- 

 inination; thyrse short. Hall & Harbour, 399. Sangre de Cristo Pass, 

 Brandegee. Mount Lincoln, at 13,000 feet altitude, Coulter. 



PENTSTEMON HALLII, Gr. Gr. Rev., I. c., p 7C. Stems numerous from 

 a creeping root-stock, 3'-5' high, glabrous except the inflorescence which 

 under the microscope is very minutely glandulose; leaves very enure, 

 pale, glaucous, linear-spatulate or linear, radical and lower cauline ones 

 attenuated at the base, l'-2' long, including the petiole, lJ"-4" wide; 

 thyrse or simple raceme 4-10-flowered ; pedicels short; sepals ovate or 

 oblong, with broad, often erose, scarious margins; corolla 7 // -9 // long, in- 

 flated, ventricose-campanulate from a very short base, bluish-purple, 

 lips short, about equal in length, upper one almost 2-lobed to the middle, 

 lower 3-lobed, glabrous within ; beard of the sterile filament short. 

 Hall & Harbour, 388. Wet Mountain Valley, Brandegee. Horse Shoe 

 Mountain, at 11,000 feet altitude, Coulter. Gray's Peak, Redfield. 



PENTSTEMON HARBOURII, Gr. Gr. Rev., I. c., p. 71. Stems many from 

 a slender, creeping root-stock, low, 2'-4' long, pruiuose-puberuleut even 



