Pentstemon. SCROPHULARIACE^. 271 



++++++++ Leaves pinnately parted into narrowly linear divisions ! 

 P. dissectus, Ell. Merely puberulent : stem slender, 2 feet high : leaves in rather dis- 

 tant pairs; radical and lowest not seen; upper with 7 to 11 obtuse entire divisions, of 

 barely half line in width, on a rhachis of equal breadth : thyrsus long-peduncled, umbelli- 

 form or triradiate, few-flowered : pedicels slender : sepals ovate-oblong : corolla " purple," 

 9 lines long, oblong-f unnelform ; the limb obscurely bilabiate : sterile filament bearded at 

 the apex. — Sk. i. 129 ; Gray, 1. c. — Middle Georgia, " Jackson" Darby. 



§ 2. Saccanthera, Benth. Anthers sagittate or horseshoe-shaped ; the cells 

 confluent at the apex, and there dehiscent by a continuous cleft, which extends 

 down both cells only to the middle ; the base remaining closed and saccate, some- 

 times hirsute, never lanate. Pacific-States species, herbaceous or some rather 

 woody at base, mostly with ample and showy flowers. 



* Soft-pubescent and viscid, with broad and thinnish leaves mostlj' serrate or denticulate. 

 P. glandulosus, Lindl. Stem rather stout, 2 or 3 feet high : radical leaves ovate or 

 oblong, 6 or 8 inches long, dentate: cauline from cordate-clasping to ovate-lanceolate, 

 acuminate, usually denticulate or few-toothed: thyrsus contracted and interrupted, 

 leafy below : cymes short-pedunculate, few-several-flowered : sepals attenuate-lance- 

 olate, lax : corolla lilac, over an inch long, with funnelform-inflated throat, and rather short 

 broad and spreading lips: sterile filament glabrous. —Bot. Reg. t. 1262; Hook. Bot. Mag. 

 t. 3868 ; Benth. in DC. Prodr. x. 330 ; Gray in Proc, Am. Acad. vi. 74. P. staticifolius, 

 Lindl. Bot. Reg. t. 1770. — Mountain woods and along streams, Oregon and Washington 

 Terr, to Idaho. 



* * Glabrous or merely puberulent: leaves serrate, incisely dentate, or sometimes laciniate : sterile 

 filament more or less fiairy above : corolla funnelform and moderately bilabiate, lilac, purple, or 

 light violet, 



■i— Over an inch long : calyx remarkably small. 

 P. venustus, Dougl. Very glabrous : stems rather strict and simple, a foot or two 

 high, leafy : leaves thickish in texture, oblong-lanceolate or the upper ovate-lanceolate, 

 closely and subulately serrate (about 2 inches long) : thyrsus naked, mostly narrow : pe- 

 duncles 1-3-flowered : sepals ovate, acute or acuminate, only a line or two long, much 

 shorter than the proper and narrow tube of the corolla: upper part of fertile filaments 

 and of the sterile one (as also usually anthers and lobes of the corolla within) sparsely 

 pilose. — Lindl. Bot. Reg. t. 1309 ; Benth. 1. c. ; Gray, 1. c. P. amosnus, Kunze in Linn, 

 xvi. littbl. 1071 —Oregon and Idaho. 



•1— -1— Corolla barely or less than an inch long : calyx and pedicels mostly puberulent or viscid- 

 glandular: stems (a foot or two high) ascending or "diffuse: thyrsus paniculate. 



P. diffdsus, Dougl. Leaves from ovate to oblong-lanceolate, or the upper subcordate, 

 sharply and unequally and sometimes laciniately serrate (1| to 4 inches long): thyrsus 

 commonly interrupted and leafy : pedicels mostly shorter than the ovate or lanceolate and 

 acuminate (sometimes laciniate-toothed) sepals: corolla three-fourths inch long: anthers 

 glabrous: sterile filament villous-bearded above. — Lindl. Bot. Reg. t. 1132; Hook. Bot. 

 Mag. t. 3645 ; Gray, 1. c. P. serrulatus, Menzies in Hook. Fl. ii. 95. P. argutus, Paxt. Mag. 

 Bot. vi. 271, appears to be a form of this, connecting with the next species. — Wooded or 

 rocky banks, Oregon to Brit. Columbia. 



P. Richardsonii, Dougl. Stems often loosely branching: leaves ovate- to narrowly 

 lanceolate in outline, from incised to laciniate-pinnatifid ; the upper commonly alternate 

 or scattered: thyrsus loosely panicled: sepals (ovate or oblong) and pedicels often gland- 

 ular and viscid: corolla three-fourths to an inch long: sterile filament sparingly villous- 

 bearded at apex. — Lindl. Bot. Reg. t. 1121 ; Hook. Bot. Mag. t. 3391 ; Lodd. Bot. Cab. t. 

 1641. — Bare rocks, &c., Oregon and Washington Terr. 



P. triphyllus, Dougl, Stems slender, about a foot high, usually simple: cauline 

 leaves lanceolate or linear (an inch or so long), rigid, from denticulate to irregularly pin- 

 natifid-laciniate ; the upper sometimes ternately verticillate, sometimes alternate: thyrsus 

 narrow, loosely paniculate : sepals lanceolate, acuminate : corolla comparativel}' small and 

 narrow, half to two-thirds inch long: sterile filament densely bearded at apex. — Lindl. 

 Bot. Reg. t. 1245; Benth. in DC. Prodr. 1. c — Rocks, &c., Oregon to British Columbia. 



