1270 



PENTSTEMON 



calyx, the upper part broad and ventricose, the sub- 

 equal lobes rounded and spreadlner. ttin tlti-i.nt liairy; 

 sterile filament hairy at the top. Mix. I;M :>•■( An 



old garden plant which is variable in li 



has received many names, as P. ".- 'i"- 



purptireus, pulchelliis, roseiis. Set- HI;. i:;;IIJJ and 

 14:1138. L.B.C. 15:1429, 1438. 



20. htlmiliB, Nutt. Low, usually not over 6 in. tall, 

 pubescent in the inflorescence: 1 vs. oblong to lanceo- 

 late, somewhat glaucous, the upper ones small-toothed: 

 inflorescence 3-1 in. long, with 2-5-fld. peduncles: fls. 

 ?2 in. long, rather narrow, deep blue or sometimes 

 ranging to white, the lower lip. 



bearded within. Rocky Mts., i 

 F. 1875:211. 



21. gracilis, Nutt. Talle 

 times minutely puberulent, slen- 

 der : Ivs. iinear-lanceola 

 times nearly entire, the radical 

 ones spatulate or oblong: inflores- 

 cence strict, the peduncles 2- or 

 more-fld. : fls. nearly 1 in. long, 

 mostly narrow-funnelform, lilac- 

 purple ranging to white. Colo, and 

 Wyo., north. B.M. 2945. L.B.C. 

 16:1541.— Pretty species. 

 II. Color of fls. nearly or quite 



white, but sometimes shaded 

 with red or purple. 



22. tubifldrus, Nutt. Stem 2-3 ft., 

 t leafy above: Ivs. oblong 



ovurc-hmceolate, barely 

 '. passiTiir into small bracts 

 • ve : intlurcsoence of densely- 

 . somewhat whorled clusters: 

 about ^ in. long, scarcely 2- 



PENTSTEMON 



spreading, the small lower lip bearded at the base. Pa., 

 west and south. B.M. 1425.— A coimuon plant, best 

 known in the form 



Var. Digitalis, Gray {P. DigitMis, Nutt.). Pig. 



1715. Very tall, 4-5 ft., with larger white abruptly in- 



lowers. B.M. 2587.- Sometimes becomes a weed 



tiflds. It is iu cultivation as a border plant. 



Palmeri, Gray. Plant 2-:! ft. tall, the foliage 



■ k, oviiti- to oblong-lanceolate, the 



?r piaioied and the upper connate, very sharp-den- 



or sometimes almost entire : inflorescence long, 



tly glandular: fls. cream-white tinted with pink, the 



narrow part of the tube about as long as the 



calyx, the upper part very wide and open, the 



mouth % in. across and 2-lipped: sterile fila- 



ellow-bearded. Utah, south and west. 



B.M. ()064. F.S. 20:2094. P. 1874:37. 



flated i 



glauc, 



III. Color of flou 

 Cl^velandi, Gray. 1 



ft. 



1715. Beard-tongue— Pentstemon teviaatus. var. 



lipped, the spreading limb nearly as long as the tube, 

 white or nearly so and sometimes tinged with purple. 

 Kans. and Ark. 



23. laevigitus, Solander. Tall and slender, 2-A ft., 

 more or less glaucous: Ivs. rather firm, purplish, some 

 what glossy, ovate to ovate-oblong-lanceolate and clasp- 

 ing, the radical ones oblanceolate or broader, all small- 

 toothed: inflorescence long and loose: fls. about 1 in. 

 long, white and sometimes tinged with color, rather 

 slender, narrow at the base, the short lobes not wide- 



more, 

 less glaucous, becoming woody at 

 the base: Ivs. rigid, oblong or ovate, sharp- 

 toothed, the upper ones usually connate by 

 their bases: inflorescence long and narrow: 

 tts. '% in. long, crimson, with narrow throat; 

 sterile filament bearded at top. S. Calif. 

 G.M. 36:626. P. 1878, p. 149. 



HH. Sterile filament glabrous. 

 26. dedstUB, Dougl. Stems 1 ft. or less tall 

 from a woody base, glabrous throughout : Ivs 

 thiekish, varying from nearly linear to lance- 

 olate to ovate, some or all of "them serrate, the 

 uppermost sessile: infioresceiice iiiany-fld., 

 loose and open: fls. not over }4 in. long, dull 

 white or yellowish white and sometimes 

 tinged with purple, wide-mouthed, the lobes 

 wide-spreading. Montana to Calif. B.R. 16: 

 1318. 



specWbilis, Thurber. Two-4 ft., erect, 

 somewhat glaucous: Ivs. ovate to ovate-lan- 

 ceolate or sometimes oblong, acute, the up- 

 per ones acuminate and connate by their 

 bases, very sharp serrate-dentate : inflores- 

 cence long and many-fld.: fl. 1 in. or more 

 long, rose-purple or lilac, the narrow part of 

 the tube about twice the length of the calyx, 

 the upper part broad and full, the lobes 

 rounded. N. Mex. to S. Calif. B.M. 5260.- 

 A beautiful species. 



EE. Stem and Ivs. more or less 

 pubescent or hirsute. 

 F. Corolla 2 in. long. 

 28. Cobaea, Nutt. Fig. 1716. 

 Straight and erect, stout, about 

 2 ft., minutely pubescent: Ivs. 

 thick, ovate-oblong to oblong to 

 broad-lanceolate, the upper ones 

 clasping: inflorescence mostly 

 simple and open : fls. very large, 

 reddish ['Ui'iiie t" wljite, the 

 base ver\ n;(rrit\\ )>iii the upper 

 part of til. ii..w,i Im.ad and 

 open, thi- liiiili only ul.x-urely 2- 

 lipped; sterile filament bearded. 

 Prairies, Kans., south. B.M. 

 3465. Gn. 49:1068. Mn. 4:113. 

 — Very showy, and probably one 

 of the parents of the garden 

 race of hybrid Pentstemons. 



Corolla 1 i 



less long. 



29. cristatus, Nutt. Only a few inches high, pubes- 

 cent, usually viscid above: Ivs. linear-lanceolate to nar- 

 row-oblong: inflorescence erect, leafy below: fls. about 

 1 in. long, purplish, rather abruptly dilated above, the 

 lower lip bearded ; sterile filament strongly yellow- 

 bearded. Dakota to Colo, and N. — Good. 



30. ovitUB, Dougl. Stem slender but erect, 2-4 ft., 

 more or less pubescent: Ivs. ovate, rather thin, bright 

 green, serrate, the upper ones clasping: inflorescence 



