* 

 Pentstemon. SCROPHULARIACEJ3. 561 



* * Leaves entire : corolla purple or blue. 



+- Corolla rather slender, half art, inch or so long : sterile filament commonly a little 



bearded down one side. 



19. P. gracilentus, Gray. A foot or more high, up to the inflorescence gla- 

 brous : stems slender, few-leaved and with long internodes above, terminating in a 

 loose mostly naked and short panicle : leaves lanceolate, or the upper ones linear 

 and the lowest oblong : slender 2 - 5-ttowered peduncles and short pedicels as well 

 as the calyx glandular-pubescent : corolla bright violet-blue, tubular and gradually 

 broadening upwards; the lips (2 lines long) moderately spreading. Pacif. R. Rep. 

 vi. 82, & Proc. Am. Acad. vi. 75. 



Shaded ground or banks, through the northern portion of the Sierra Nevada (Newberry, An- 

 derson, &c.), and on Mt. Shasta above 8,000 feet, Brewer. 



-t- +- Corolla larger and ventricose-dilated above ; the broad lips widely spreading : 

 sterile filament glabrous : flowers racemose-panicled, showy. 



20. P. heterophyllus, Lindl. Glabrous or minutely hoary-puberulent, not 

 glandular, pale, and sometimes glaucous, sending up many virgate leafy stems, 2 to 

 5 feet high from a persistent woody base : leaves lanceolate or linear, or the lowest 

 oblong-lanceolate, the floral diminishing into narrow subulate bracts : peduncles 

 1 - 3-flowered, mostly short and erect : corolla pink or rose-purple, or with shades 

 of violet, fully an inch long, ventricose-funnelform above the narrow rather slender 

 base. Bot. Reg. t. 1899; Bot. Mag. t. 3853. 



Dry banks of streams, through the western pail of the State, from San Diego to Mendocino 

 Co. The anthers, as in all the following, are ciliate with short and stiff bristles along the line 

 of opening, and otherwise either glabrous or sparsely hirsute underneath. All these are showy 

 species ; and they seem to run into one another. The calyx is variable. 



21. P. azureus, Benth. Glabrous and glaucous, 1 to 3 feet high : leaves as in 

 the preceding, or inclined to be more lanceolate or with a broader base : corolla 

 similar, but azure-blue or approaching violet, sometimes with red-purple tube, 

 mostly rather broader and larger. PI. Hartw. 327 ; Gray, Proc. 1. c. vi. 75. 



Var. Jaffrayanus, Gray. A foot high : leaves broader ; the lower spatulate- 

 oblong, the upper from oblong-lanceolate to ovate. P. glaucifolius, Gray in Pacif. 

 R. Rep. vi. 82. P. Jaffrayanus, Hook. Bot. Mag. t. 5045. P. heterophyllus, var. 

 latifolius, Watson, Bot. King Exp. 222. 



Common through the interior, from the Sacramento Valley eastward : the variety in the Sierra 

 Nevada ; also in the Wahsatch Mountains of Utah. 



22. P. laetus, Gray. Cinereous-puberulent or pubescent and above glandular, 

 a foot high : leaves from lanceolate to linear or below to spatulate : panicle more 

 open ; the peduncles and pedicels often spreading : corolla as of the preceding or 

 smaller, an inch long, blue. Jour. Bost. Nat. Hist. Soc. vii. 147, & Proc. Am. 

 Acad. vi. 76. 



Near Los Angeles ( Wallace) and Tejon (Xantus) to the Sierra above the Yosemite Valley, &c. 



23. P. Roezli, Regel. Smaller, a span to a foot or so high, below glabrous or 

 minutely puberulent, above (at least the inflorescence) glandular-pubescent : leaves 

 all lanceolate or linear (an inch or more long) : panicle open and often compound ; 

 the few-flowered or loosely several-flowered peduncles and the pedicels commonly 

 diverging : corolla from half to two thirds of an inch long, bluish or pale violet. 

 Regel in Proc. St. Petersb. Bot. Gard. ii. 326. P. heterophyllus, var. (]), Ton. & 

 Gray in Pacif. R. Rep. ii. 122. 



Higher Sierra Nevada, in Nevada and Sierra counties, Seckwith, Lemmon, &c. Also Washoe 

 Valley, Nevada, Stretch, &c. Resembles a reduced form of P. Icetus, but more glabrous, and the 

 flowers much smaller. Regel finds occasionally some scattered hairs on the sterile filament : we 

 find none. 



