Pentstemon. SCROPHULARIACE.E. 269 



ment dilated, uncinate at tip. Proc. Am. Acad. vi. 73. New Mexico, Sandia Mountains, 

 Biijelow. Corolla in size and shape, and probably color, resembling that of P. ylaucus. 



P. deustus, Dougl. Completely glabrous ; the calyx at most obscurely granular-prui- 

 nose or glandular : stems a span to a foot high in tufts from a woody base, rigid : leaves 

 coriaceous, from ovate to oblong-linear or lanceolate (an inch or two long), irregularly and 

 rigidly dentate or acutely serrate, or some of them entire ; upper cauline closely sessile : 

 thyrsus virgate or more paniculate, mostly many-flowered : peduncles and pedicels short : 

 sepals from ovate to lanceolate, nearly marginless : corolla ochroleucous or dull white, 

 rarely with a tinge of purple, half inch or less long, either narrowly or rather broadly fun- 

 nelform ; the short lobes widely spreading. Lindl. Bot. Keg. t. 1318; Ik-nth. 1. c. ; Gray, 

 I.e., & Bot. Calif, i. 559; Watson, Bot. King, 222, who has seen the "filament bearded 

 with yellow hairs." P. Jtetemnder, Torr. & Gray, Pacif. R. Rep. ii. 123, t. 8, a narrow- 

 leaved form having the fifth filament in some flowers antheriferous. Dry interior region, 

 California, on the eastern side of the [Sierra Nevada, and north to the borders of Brit. 

 Columbia and Montana. 



P. heterodoxus. A span or more high, leafy, glabrous nearly up to the inflorescence : 

 leaves oval or oblong, obtuse, entire ; the cauline closely sessile : thyrsus short, compact, 

 viscid-pubescent : sepals lanceolate : corolla 7 lines long, narrow-tubular, hardly dilated up 

 to the small limb, probably purplish : fifth filament filiform, resembling the others, in some 

 flowers completely antheriferous. P. Fremont.!, Gray, Bot. Calif, i. 622, not of Torr. & 

 Gray. High mountain near Donner Pass, in the Sierra Nevada, California, Torrey. 

 Species imperfectly known, from insufficient specimens. 



.(_(. .j-j. Leaves from linear-spatulate to obovate, or the uppermost sometimes ovate, entire : stems 

 low-cespitose or spreading, leafy to summit, often suffrutescent at bast-, few-flowered : corolla 

 over half inch lung, mostly purple or blue, narrowly funnelform: sterile filament bearded down 

 one side. 



= Leaves green and mostly glabrous, broad, half to quarter inch wide. 



P. Harbourii, Gray. Tufted nearly simple stems 2 to 4 inches high, puberulent : leaves 

 about 3 pairs, thickish, obovate, oval, or the uppermost sometimes ovate, these sessile by a 

 broad base: thyrsus reduced to 2 or 3 crowded short-pedicelled flowers : sepals ovate- 

 oblong, villous and somewhat viscid : corolla little bilabiate, with rather broad cylindra- 

 ceous throat and tube, barely twice the length of the round-oval lobes; lower lip bearded 

 within. Proc. Am. Acad. vi. 71. High alpine region of the Colorado Rocky Mountains, 

 Hall & Harbour, Parry. 



= Leaves cinereous or canescent, a line or two wide: sepals lanceolate: corolla narrowly fun- 

 nelform, mostly three-fourths inch long: flowering along the short stems in the axils of the 

 leaves : short peduncles leafy-bracteolate, 1-3-flowered. 



P. pumilus, Nutt. Caneseent (even to the marginless sepals) with a dense and fine 

 short pubescence: stems an inch or two high, erect or ascending, very leafy: leaves lan- 

 ceolate or the lower spatulate (the latter, including the attenuate base or margined petiole, 

 an inch or more long) : corolla with regularly funnelform throat, glabrous within : sterile 

 filament sparsely short-bearded, or more abundantly at the tip. Jour. Acad. .Philad. vii. 

 46; Gray, 1. c. 67. Rocky Mountains in Montana? " on Little Goddin River," Wyeth. A 

 small and few-flowered plant. 



Var. Thompsoiliae. Cespitose, from half inch to 4 inches high, suffrutescent at 

 base: stems copiously flowering for their whole length: lowest leaves obovate; upper 

 lanceolate : corolla two-thirds to three-fourths inch long. S. Utah, Mrs. Thompson, < '-//'' 

 Bishop (a dwarf and depressed form), also Slier, Palmer, a more developed and elongated 

 form, with corolla apparently bright blue. 



Var. incanus. A small and very white-hoary form, few-flowered : leaves only 2 or 3 

 lines long, spatulate and obovate, more mucronate : corolla half inch long, slightly hairy 

 within down the lower side, somewhat as in the next. Pahranagat Mountains, S. E. 

 Nevada, Miss Searls. S. W. Utah, Slier. 



P. csespitosus, Nutt. Minutely cinereous-puberulent, spreading, forming depressed 

 broad tufts 2 to 4 inches high: leaves from narrowly spatulate to almost linear (3 to 8 

 lines long, including the tapering base or margined petiole) : peduncles mostly secund and 

 horizontal, but with the flower upturned : sepals more acuminate, and the margins below 

 obscurely scarious : corolla tubular-funnelform, and the lower side biplicate, the narrow 

 folds sparsely villous within: sterile filament strongly and densely bearded. Gray, Proc. 



