264 SCROPHULARIACE/E. Pentstemon. 



the clusters several-flowered, and peduncles and pedicels mostly very short : sepals ovate 

 and acute or lanceolate: corolla lilac or changing to violet; the limb half or two-thirds 

 inch in diameter: sterile filament mostly bearded at the dilated tip: capsule firm-coria- 

 ceous and acuminate. Lindl. Bot. Reg. t. 1285; Hook. Fl. ii. 97; Benth. in DC. I.e.; 

 Gray, Proc. Am. Acad. vi. 61 (excl. syn. P. secund(flonts), & Bot. Calif, i. 559. P. nitidus, 

 Dougl. ex Benth. in DC. 1. c. P. Fendleri, Gray in Pacif. R. Rep. ii. 108, t. 5, & Bot. Mex. 

 Bound. 114, excl. syn. Plains of the Saskatchewan and Upper Missouri to the interior 

 of Oregon, and south to Nevada, New Mexico, and the western borders of Texas. (Ad- 

 jacent Mex.) Seems to pass into 



P. C3eruleus, Nutt. Low : leaves (even the radical) all from lanceolate to narrowly 

 linear (often 3 inches long and only a line or two wide) : thyrsus spieiform and usually 

 dense : sepals lanceolate-acuminate : corolla blue, varying occasionally to rose-lilac or 

 white: sterile filament much bearded above. Gen. ii. 52; Benth. in DC. 1. c. ; Gray, 1. c. 

 P. angustifolius, Nutt. in Fras. Cat,; Pursh, Fl. ii. 738. Plains of Dakota and Montana to 

 Colorado at the base of the mountains. 



H- -w- -n- Corolla an inch or less long, red, tubular or funnelform, hardly bilabiate; the roundish 

 or short-oblong lobes all alike, except that the two upper are rather more united: sepals ovate or 

 roundish, obtuse or acute: peduncles usually manifest and pedicels slender. 



= Sterile filament filiform, naked: corolla narrow-tubular, deep scarlet; lobes short, little 

 spreading. 



P. centranthifolius, Benth. Very glaucous : stem strict, leafy, 1 to 3 feet high : 

 leaves thick, from ovate-lanceolate or the lowest oblong to lanceolate-linear, the upper 

 with subcordate-clasping base: thyrsus virgate, elongated: corolla fully an inch long; 

 the lobes (2 lines long) hardly longer than the width of the orifice. Scroph. Ind. & Prodr. 

 1. c. ; Hook. Bot. Mag. t. 5142 ; Gray, 1. c. Che/one centranthifolia, Benth. in Hort. Trans. ; 

 Lindl. Bot. Reg. t. 1737. Open grounds, California, from Monterey southward, and W. 

 Arizona. 



= = Sterile filament dilated at tip and retrorsely bearded down one side: corolla funnelform, 

 and with rather large and rounded widely spreading lobes. 



P. puniceus, Gray. Very glaucous : stem stout, " 1 to G feet high," sparsely leafy : 

 leaves thick, oblong or the lowest obovate and the uppermost ovate, sometimes connate- 

 perfoliate : thyrsus virgate, interrupted, many -flowered : corolla almost an inch long, nar- 

 rowly funnelform, " brilliant scarlet ; " the limb two-thirds inch in diameter. Bot. Mex. 

 Bound. 113, & Proc. 1. c. Guadalupe Canon, Arizona, Thurber, E. K. Smith. 



P. Parryi. Less glaucous : stem virgate, a foot or two high : leaves from oblong to nar- 

 rowly lanceolate; the upper with auricnlate or roundish partly clasping base; radical 

 oblanceolate or spatulate : racemiform thyrsus more simple and fewer-flowered : corolla 

 narrowly funnelform, half to three-fourths inch long, "bright pink" or cherry -red; the 

 limb half inch in diameter. P. puniceus, var. ? Parri/i, Gray, Bot. Mex. Bound. 1. c. 

 Western Arizona, Parr;/, Palmer, Greene. Southern Nevada, Miss Semis, Palmer. Southern 

 Utah, Parry. Some specimens of this have been referred to the preceding, some to the 

 following species. 



P. TA^rightii, Hook. Pale and somewhat glaucous or glaucescent : stems rather stout, 

 a foot or two high : leaves oblong or the lowest obovate (2 to 4 inches long, an inch or so 

 wide); upper cauline partly clasping by a roundish base: thyrsus virgate and elongated, 

 loosely flowered : sepals when in bloom with spreading tips : corolla bright rose-color, 

 about three-fourths inch long and with ampliate throat, the expanded limb three-fourths 

 inch in diameter. Bot. Mag. t. 4601 (corolla too deep red), Gray, I.e.; Fl. Serres, vii. 

 t. 685. W. Texas and New Mexico, Wright, &c. 



-{ -t-H -H- ++ Corolla showy, inch and a half or more in length, ventricose-funnelform, somewhat 

 bilabiate, the upper lip rather smaller: sterile filament hooked at apex: sepals ovate or oblong- 

 lanceolate, barely acute : thvrsus virgate, with hardly any common peduncles to the few-flowered 

 clusters: leaves glaucous, thickish, broad; the upper and the ilural rounded, all hut the obovate 

 radical ones clasping or perfoliate: stem 2 to 4 feet high. 



P. grandiflorus, Nutt. Leaves all distinct at base : pedicels short : corolla lilac or 

 lavender-blue, abruptly ventricose above the proper tube, which exceeds the calyx: sterile 

 filament minutely pubescent at the dilated apex. Fras. Cat. & Gen. 1. c. ; Benth. I.e.; 

 Gray, 1. c. P. Braclbnrii, Pursh, Fl. ii. 738. Prairies, from Wisconsin, Minnesota, and Illi- 

 nois to Nebraska and Kansas. Capsule almost an inch long. 



