1270 



PENTSTEMON 



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

 equal lobes rounded and spreading, the throat hairy; 

 sterile filament hairy at the top. Mex. B.M. 388-t.— An 

 old garden plant which is variable in color and which 

 has received many names, as P. auriuslifoUus, atro- 

 purpureus, pulcheUiis, roseus. See B.R. 13:1122 and 

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



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

 pubescent in the iufloresct-nce: Ivs. oblong to lanceo- 

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

 inflorescence 3-4 in. long, with 2-.')-fld. peduncles: fls. 

 H in. long, rather narrow, deep blue or sometimes 

 ranging to white, the lower lip 

 bearded within. Rocky Mts., west. 



75:241. 



21. gricilis, Nutt. Taller, sonie- 

 utely puberulent, slen- 

 der : Ivs. linear-lanceolate, sonic- 

 times nearly 

 ones spatulate or oblong: inflores 



the peduncles 2- oi 

 more-fld. : fls. nearly 1 in. 

 mostly narrow-funnelform, li 

 purple ranging to white. Colo. 

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

 16:1541. — Pretty species. 

 II. Cnlnr nf fU . vearh/ or quite 

 whit,'. 1,1,1 soi„,'times shailed 



tubifldrus, N'utt. Stem 2-3 ft., 

 , nut leafy above : Ivs. oblong 

 -lanceolate, barely serru- 

 late, passing into small bracts 

 above : inflorescence of densely - 

 fld., somewhat whorled clusters: 

 fls. about % in. long, scarcely 2- 



PENTSTEMON 



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

 west and south. B.M. 142.").— A common plant, best 

 known in the form 



Var. DigiUIis, Gray {P. DigUAlis, Nutt.). Fig. 

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

 flated flowers. B.M. 2587. — Sometimes becomes a weed 

 in old fields. It is in cultivation as a border plant. 



24. Pilmeri, Gray. Plant 2-3 ft. tall, the foliage 

 glaucous : Its. thick, ovate to oblong-lanceolate, the 

 lower petioled and the upper connate, very sharp-den- 

 tate or somftinir->; .'iIiii..Nt entire: inflorescence long, 

 mostly glaiiiluhir: l\~. .ream-white tinted with pink, the 

 ii:irrow ]i:iii .,f the tube about as long as the 

 cal> \. tlir upi'tT part very wide and open, the 

 mouth ;'4 in. across and 2-lipped; sterile fila- 

 yellow-bearded. Utah, south and west. 

 B.M. 6064. F.S. 20:2094. P. 1874:37. 

 III. Color of flowers red. 

 25. CWvelandi, Gray. Two ft. or more, 

 less glaucous, becoming woody at 

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

 toothed, the upper ones usually connate bv 

 their bases: inflnres<-eTic.- Ion- and narrow": 

 fls. % in. long, criiiiN..ii, witli narrow throat; 

 sterile filament lna).!.-.! at t"]., S. t'tilit. 

 G.M. 36:026. F. 1S7,S. p. 14'.i. 



HH. Sterile filamenl glabrous. 

 deiistus, Dougl. Stems 1 ft. or li 



tall 



171S. Beard-toneue- Pentstemon Ixvigatus. var. Dieitalis ( 



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

 white or nearly so and sometimes tinged with purple. 

 Kans. and Ark. 



23. IsevigitUB, Solander. Tall and slender, 2^ 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- 



woody base, glabrous throughout : Ivs 

 thickish, varying from nearly linear to lance- 

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

 uppermost sessile: inflorescence many-fld., 

 loose and open: fls. not over X 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. 



27. spectibiliB, Thurber. Two-4 ft., erect, 

 somewhat glaucous: Ivs. ovate to ovate-lan- 

 ceolate or sometimes oblong, acute, the up- 

 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 

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

 A beautiful species. 



EE. Stem find h'S. more or less 

 piibeseent or hirsute. 

 F. Corolla 2 in. long. 

 28. Cobiea, 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 purple to white, the 

 base very narrow but the upper 

 part of the flower broad and 

 open, the limb only obscurely 2- 

 lipped; sterile filament bearded. 

 Prairies, Kans., south. B.M. 

 3405. Gn. 49:1068. Mn. 4:113. 

 — Very showy, anil probably one 

 of the parents of the garden 

 race of hybrid Pentstemons. 



KF. Corolla 1 in. or less long. 

 29. oristatus, 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 fllament strongly yellow- 

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

 ' 30. ov&tus, Dougl. Stem slender but erect, 2-4 ft., 

 more or less pube.scent: Ivs. ovate, rather thin, bright 

 green, serrate, the upper ones clasping: inflorescence 



