448 SCROPHULARIACEAE (FIGWORT FAMILY) 



into a broadly cyathiform-campanulate throat: anthers glabrous, confidently 

 1-celled, not explanate; sterile filament bearing some sparse, very long, 

 yellowish-white hairs at the tip, and barbate laterally near the middle with 

 close, somewhat reflexed, yellow bristles. P. Jamesii. (See Bull. Torr. Bot. 

 Club 25 : 548. 1898 for distinctions between P. Jamesii Benth. and P. Jamesii 

 Gray.) Central and southern Colorado and New Mexico. 



42. Pentstemon montanus Greene, Pitt. 2: 240. 1892. Stems 1-2 dm. 

 high, herbaceous and of annual growth from a slender subterranean caudex or 

 rootstock and with the leaves cinereously puberulent, almost equably leafy 

 up to the inflorescence : leaves oblong- to ovate-lanceolate, the lower obtuse, the 

 upper acute or acuminate, 2-3 cm. long or less, saliently dentate: flowers in 

 1-3 pairs: corolla about 2.5 cm. long, the tube scarcely ventricose, the 

 color "pink-purple": sterile filament naked. Northwestern Wyoming and 

 in the high mountains of adjacent Idaho and Montana. 



43. Pentstemon erianthera Pursh, Fl. 737, 1814. Puberulent below, 

 glandular- villous and viscid above; stem leafy, 1-3 dm. high: leaves firm, 

 entire or repand; the lower and basal ones oblong or spatulate, 5-10 cm. long, 

 narrowed into margined petioles; the upper sessile or somewhat clasping, acute 

 or acuminate: thyrsus dense, narrow, leaf y-bracted ; flowers almost sessile: 

 calyx-segments linear-lanceolate, acuminate: corolla about 2.5 cm. long, red 

 or purple, the lower lip villous within: sterile filament densely yellow-woolly. 

 P. cristatus. Plains and foothills; Wyoming and the Dakotas to Washington. 



44. Pentstemon albidus Nutt. Gen. 2: 53. 1818. Stem puberulent below, 

 densely glandular-pubescent above, 1.5-2.5 dm. high: basal and lower leaves 

 spatulate or oblong, obtusish, mostly entire; the upper lanceolate or oblong, 

 sessile, denticulate, acute or acuminate, 3-7 cm. long: thyrsus narrow, raceme- 

 like, leaf y-bracted, interrupted: calyx-segments lanceolate, acuminate, viscid, 

 one half as long as the corolla-tube: corolla white or nearly so, 1.5-2 cm. long, 

 the limb nearly 5-lobed, the lobes spreading. On dry plains; South Dakota 

 to Colorado, Nebraska, and Texas. 



45. Pentstemon Moffattii Eastwood, Zoe 4: 9. 1903. Stems several, 

 2-5 dm. high, erect, scabrous below, glandular-hirsute above: radical leaves 

 crowded, ovate-spatulate, entire, decurrent on the petioles which are as long 

 or longer than the blade; lower cauline spatulate; upper ovate-lanceolate, 

 closely sessile by a cordate base, obscurely dentate at the apex or entire: 

 thyrsus interrupted, the many-flowered clusters 2-3 cm. apart: sepals linear- 

 lanceolate, hirsute, glandular, and ciliate with crimped hairs: corolla purplish- 

 blue, hardly bilabiate, the spreading lobes orbicular: two of the stamens in- 

 serted at the base, the other two halfway up the limb, nearly on a line with 

 the sterile filament which is moderately bearded down the side with hairs 

 pointing downwards. Dry plateaus; western Colorado. 



46. Pentstemon Bridges!! Gray, Proc. Am. Acad. 7: 379. 1867. Stems 

 2-5 dm. high from a lignescent base, glabrous up to the virgate secund thyrsus, 

 or pruinose-puberulent: leaves spatulate-lanceolate to linear; the floral re- 

 duced to small subulate bracts: peduncles (l-S^owered) and pedicels short; 

 these and the ovate or oblong sepals glandular-viscid: lips of the narrow 

 corolla fully one third the length of the tubular portion; the upper erect and 

 2-lobed; the lower 3-parted and its lobes recurved: anthers deeply sagittate, 

 the cells confluent at the apex and opening only to the middle, the base re- 

 maining closed and saccate. Southwestern Colorado and in Nevada and 

 California. 



47. Pentstemon Kingii Wats. Bot. King's Exp. 222. 1871. Pruinose- or 

 glandular-pubescent, at least below; stems numerous, from a shrubby base, 

 ascending, 1-2 dm. high: leaves oblanceolate, mostly acute, entire, sessile, 

 with a narrowed base, the lowermost somewhat spatulate and short-petioled, 

 3-5 cm. long: secund racemes short and rather leafy at base, with 1-4- 

 flowered peduncles: sepals ovate or oblong-lanceolate, more or less acuminate, 

 sometimes slightly scarious and erose upon the margin: corolla 14-16 mm. in 

 length, purple, dilated upward, somewhat bilabiate: anthers with confluent 

 cells, dehiscent to the middle, glabrous but hirsute-ciliate upon the margins; 



