6o Sierra Club Publications. 



Pentstemon Davidsonii Greene. Low, witli creeping under- 

 ground stems, smooth except for some glandular pubescence on 

 the pedicels and calyx. Leaves spatulate, tapering to the base ot 

 the petiole which is about as long as the blade, together less than 

 an inch, thickish, veinless, entire, obtuse. Flowering stem with 

 a few small, sessile, bract-like leaves, as long or shorter than the 

 flowers which terminate it ; these purple-blue, more than an inch 

 long. Calyx with divisions linear, acute, almost half inch long 

 extending to the base. Corolla tubular, funnel-form, upper lip 

 2-cleft, shorter than the 3-cleft lower one. Anthers clothed with 

 dense purplish wool, becoming shield-shaped when open, fila- 

 ments short, clothed at the apex with short, woolly hairs. Above 

 timber line on Harrisons Pass. 



Pentstemon breviflorus Lindl. Shrubby, with many slender, 

 wand-like stems, often several feet high, smooth and glaucous, 

 iorming a brushy clump several feet high. Leaves lanceolate, 

 narrowed at base to slender petiole which abruptly widens and 

 clasps the stem, sharply and somewhat distantly toothed, acute, 

 about an inch long. Flowers in spreading panicles, the branch- 

 lets corymbosely 2-5 flowered, the lowest ones longest. Calyx with 

 awl-shaped, pointed divisions, longer than the tube. Corolla flesh- 

 color or yellowish, striped with pink, the 2 lips widely gaping, 

 upper curved, emarginate, lower with 3 recurved and pendulous 

 lobes, both clothed externally near the top with long hairs. 

 Filaments dilated and bearded at base, sterile, smooth, with the 

 bearded basal dilation much smaller. The anthers become shield- 

 shaped when open. Capsule when ripe about as long as the 

 calyx. Kings River Canon, in rocky places ; Sequoia Mills. 



Pentstemon procerus Dougl. Perennial from running root- 

 stocks, varying in height according to altitude, from a few inches 

 to 2 feet. Stems erect, simple, with i-several axillary whorls of 

 crowded flowers, glabrous except the glandular inflorescence. 

 Radical leaves oblanceolate to spatulate on slender petioles ; stem 

 leaves sessile and clasping, entire, acute or mucronulate. Calyx 

 divisions extending to the base, somewhat membranously mar- 

 gained, 3^3 as long as the corolla tube, lanceolate, glandular. 

 Corolla dark blue or purple, narrow-tubular, half inch or less in 

 length, almost equally 5-cleft, lower lip bearded on the inner side. 

 East Lake, Converse Basin. 



Pentstemon laetus Gray. Shrubby at base, with stems a foot 

 or two high, pale green from a minute pubescence, the inflores- 

 cence glandular. Lower leaves linear-lanceolate, pointed, inch or 

 2 long, tapering to the base, upper ovate, long-acuminate, heart- 



