272 SCROPHULARIACE.E. Penlstemon. 



* * # Glabrous or merely puberulent : leaves all entire, 

 -t— Corolla blue or violet, half inch long, slender-funnelform, moderately bilabiate: sterile filament 

 lightly bearded. 



P. gracilentus, Gray. Stems slender from a lignescent base, a foot or more high, 

 rather few-leaved, naked above, terminating in a loose and rather simple paniculate thyr- 

 sus : leaves glabrous and green, lanceolate, or the upper linear and the lowest sometimes 

 oblong, all narrowed at base: peduncles (and calyx) viscid-puberulent, 2-5-fl.owered; the 

 lower elongated : pedicels short : corolla-lobes only 2 lines long, moderately spreading. — 

 Pacif. R. Rep. vi. 83, Proc. Am. Acad. vi. 75, & Bot. Calif, i. 561. — Mountains; N. Cali- 

 fornia and adjacent parts of Oregon and Nevada, at 5-8,000 feet. 



+- ■+— Corolla blue to purple, more ventricose-funnelform, short-bilabiate, two-thirds to an inch 

 and a half long: sterile filament glabrous. (Species too nearly allied, mostly , lignescent or 

 rather shrubby at base.) 



++ Inflorescence and calyx glandular or viscid-pubescent: thyrsus open-paniculate. 



P. lfetus, Gray. A foot or so high, cinereous-pubescent or puberulent, above glandular- 

 pubescent : leaves lanceolate or linear-lanceolate and the lowest spatulate : sepals ovate or 

 oblong, herbaceous: corolla an inch long, blue. — Jour. Bost. Nat. Hist. Soc. vii. 147, Proc. 

 Am. Acad. 1. c, & Bot. Calif. 1. c. — Open and dry grounds, California to the mountains 

 above the Yosemite and apparently even to Siskiyou Co. 



P. Rcezli, Regel. Smaller, a span to a foot high, below glabrous or minutely puberu- 

 lent : leaves all lanceolate or linear, or the lower oblanceolate : thyrsus either narrow or 

 more diffuse and compound, with the branches divergent : corolla smaller (from half to 

 two-thirds inch long) and narrower, pale blue or violet. — Act. Hort. Petrop. ii. 326, & 

 Gartenfl. 1872, t. 239 ; Gray, Bot. Calif, ii. 567. P. heterophyllus, var.? Torr. & Gray in Pacif. 

 K. Rep. ii. 122. — Drier parts of the Sierra Nevada, California, from Kern Co. to frontiers 

 of Oregon and adjacent Nevada. Approaches smaller forms of the preceding. 



■H- ++ Inflorescence and calyx, as well as foliage, perfectly glabrous or else minutely puberulent 

 without glahdulosity : thyrsus usually narrow. 



P. Kliigii, "Watson. Hardly glaucous: stems a span or so high from the depressed 

 ligneous base, leafy to the top, erect or ascending : leaves oblanceolate or lanceolate-linear, 

 acutish or obtuse, mostly narrowed to the base, an inch or so long : thyrsus strict, 1 to 5 

 inches long : sepals ovate-lanceolate and slender-acuminate, equalling the capsule : corolla 

 comparatively small (two-thirds inch long), '"purple." — Nevada and Utah, from the W. 

 Humboldt to the Wahsatch and Uinta Mountains, Watson, &c. 

 P. azureus, Benth. Glaucous, rarely pruinose-puberulent : stems erect or ascending, 1 to 

 3 feet high : leaves from narrowly to ovate-lanceolate or even broader, the uppermost 

 wider at base : thyrsus virgate, loose, usually elongated : sepals ovate, with or without a 

 conspicuous acumination : corolla from 1 to 1-J- inches long, azure-blue verging or changing 

 to violet, the base sometimes reddish ; the expanded limb sometimes an inch in diameter. — 

 PI. Hartw. 327; Gray, 1. c. ; "Paxt. Fl. Gard. t. 64; Lem. Jard. Fl. t. 211; Moore, Mag. 

 1850, t. 209." — Dry ground, California, apparently through the length of the State, com- 

 mon on the Sacramento, &c. Founded on a rather narrow-leaved form, but varies greatly 

 in the foliage. 



Var. Jaflrayanus, Gray, 1. c. A low form : leaves oblong or oval, or the upper 

 ovateJanceolate or ovate, very glaucous : peduncles 1-5-fIowered : flowers large. — P. 

 Jaffraxjamus, Hook. Bot. Mag. t. 5045. P. glaucifolius, Gray in Pacif. R. Rep. vi. 82. 

 P. heterophyllus, var. latifolius, Watson, Bot. King, 222 ! — Northern part of California and 

 through the Sierra Nevada, also eastward to the Wahsatch Mountains in Utah, if the syn. 

 Bot. King is rightly referred. 



Var. parvulus. Less than a foot high : leaves oblong and oval, barely an inch long : 

 many-flowered thyrsus rather open : sepals broadly ovate : corolla hardly three-fourths 

 inch long: would be referred to the preceding variety, except for the smaller flowers; — 

 Northern part of California, in mountains above Jackson Lake, at 8,000 feet, Greene. 



Var. angustissimus, the extreme narrow-leaved form : leaves narrowly linear or 

 sometimes the uppermost narrowly lanceolate from a broad base. — Yosemite Valley, &c. 



Var. ambigUUS, a rather tall form, paniculately branched and slender, with lanceo- 

 late and linear leaves all narrowed at base in the manner of the following species, but pale 

 and glaucescent, and the corolla violet-blue (only an inch or less long) : sepals remarkably 



