278 SCBOFHULARIACE.E. (FIGWORT FAMILY.) 



= = Leaves cinereous or canescent, 1 or 2 lines wide : flowering along the snort 

 stems in the axils of the leaves: short peduncles 1 to 3-flowered. 



21. P. pumilus, Nutt. Canescent with a dense and fine short pubescence: 

 stems an inch or two high, erect or ascending, very leafy : leaves lanceolate 

 or the lower spatulate : corolla with regularly funnelform throat, glabrous 

 within : sterile filament sparsely short-bearded, or more abundantly at the tip. — 

 Mountains of Montana, Wyeth. 



22. P. csespitOSUS, Nutt. Minutely cinereous-puberulent, spreading, form- 

 ing depressed broad tufts 2 to 4 inches high : leaves from narrowly spatulate to 

 almost linear : peduncles mostly secund and horizontal, but with the flower 

 upturned : corolla tubular-funnelform, and the lower side biplicate, the narrow 

 folds sparsely villous within : sterile filament strongly and densely bearded. — 

 Mountains of Wyoming, Colorado, and Utah. 



* *+ ++ ++ Leaves from narrowly linear-lanceolate with tapering base or linear- 

 spatulate to filiform, entire : stems or branches racemosly several to many- 

 flowered. 



23. P. laricifolius, Hook. & Arn. Glabrous : stems or tufted branches 

 simple from an underground woody base : leaves very slender, when dry fili- 

 form, much crowded in subradical tufts and scattered on the filiform flower- 

 ing stems : short peduncles alternate : flowers few, loosely racemose : corolla 

 tubular-funnelform, half-inch long; the small limb obscurely bilabiate: sterile 

 filament longitudinally bearded. — Wyoming and Oregon. 



24. P. amblgUUS, Torr. Glabrous, a foot or two high, diffuse and often 

 much branched: leaves filiform, or the lowest linear and the floral slender- 

 subulate : inflorescence loosely paniculate : peduncles slender, opposite, the 

 upper one-flowered : corolla rose-color and flesh-color becoming white ; the 

 rotately expanded limb oblique but obscurely bilabiate ; lobes orbicular-oval ; 

 throat somewhat hairy : sterile filament glabrous, sometimes imperfectly anther- 

 iferous. — Plains of E. Colorado and New Mexico to S. Utah and Arizona. 



§ 2. 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. In ours the sterile filament is 

 glabrous. 



• Corolla blue to purple, ventricose funnelform, short-bilabiate, § to l£ inches long: 

 inflorescence, calyx, etc. glabrous. 



25. P. Kingii, Watson. Hardly glaucous : stems a span or so high from 

 the. depressed woody base, leafy to the top, erect or ascending : leaves oblanceo- 

 late or lanceolate-linear, mostly narrowed to the base : thyrsus strict, 1 to 5 

 inches long : corolla | inch long, purple. — Synopt. Fl. ii. 272. Uinta and 

 Wasatch Mouutains and westward. 



26. 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 : thyrsus virgate, loose, usually elongated": corolla from l(ol| 

 inches long, azure-blue to violet, the base sometimes reddish ; the expanded limb 

 sometimes an inch in diameter. 



Var. Jaffrayanus, Gray. A low form : leaves oblong or oval, or the 

 upper ovate-lanceolate or ovate, very glaucous: peduncles 1 to 5-flowered: 



