2540 



PENTSTEMON 



PENTSTEMON 



1 in. long, lilac-purple, ventricose from near the tips of 

 the sepals, the lobes rather short and not very unequal; 

 stamens included, woolly. Discovered by George 

 Davidson, on Mt. Conness, Calif., altitude 12,300 ft.: 

 occurs on Mt. Shasta and north to Wash. Offered 

 abroad. 



BB. Anthers glabrous or only hairy (not wootty). 

 C. Plant semi-scandent (somewhat climbing) by means 



of long slender branches, or at least some of the 



branches long and weak or slender. 

 3. cordifdlius, Benth. Plant very leafy, somewhat 

 pubescent, clambering over shrubs: Ivs. ovate, often 

 more or less cordate, serrate, 1 in. or less long: cluster or 

 thyrse short and leafy, the peduncles several-fld. ; corolla 

 tubular, scarlet, the tube 1 in. long and the limb half as 

 long. S. Calif. B.M. 4497. R.H. 1850:221. J.F. 1:14. 



4. ternatus, Torr. 

 Flowering shoots 

 2-4 ft. long, virgate, 

 glabrous and glau- 

 cous: Ivs. linear- 

 lanceolate, rigid, 

 serrate or denticu- 

 late, the upper ones 

 in 3's: fls. in a 

 raceme-like thyrse, 

 pale scarlet; calyx 

 with ovate-acumi- 

 nate parts; corolla 

 1 in. long, the lips 

 Kin. long. S. Calif., 

 in mountains. 



cc. Plant erect, self' 



supporting. 



D. Fls. lemon-yellow 



to yellow-red. 



5. antirrhinoides, 

 Benth. (P. Ldbbii, 

 Hort.). Plant 1-5 

 ft., glabrous or 

 nearly so, branched 

 and leafy: Ivs. 

 small, oval or spatu- 

 late, entire: fls. in 

 leafy panicles, the 

 peduncles 1-fld., the 

 broad fls. about 1 

 in. long, the lower 

 lip deeply 2-lobed; 

 sterile filament 

 bearded on one side. 

 S.Calif. B.M. 6157. 

 I.E. 9:315. 



2860. Pentstemon Hartwegii. ( X K) 



6. Lemmonii, Gray. Slender shrub, 5 ft. or less tall, 

 bright green and glabrous: Ivs. ovate-lanceolate, 

 toothed: panicle loose and branchy, the long peduncles 

 2-7-fld.; fls. small, dull yellowish and red, the segms. 

 nearly equal. Cent. Calif. 



DD. Fls. not yellow (unless sometimes in P. confertus), 

 mostly in shades of red or purple, sometimes 

 white. 



E. St. and Ivs. glabrous, at least up to the infl. (Nos. 



7-84). 



F. Corolla long and slender, not swollen near the base 

 or greatly widened at the mouth: straight-fld. 

 species. 



7. barbatus, Nutt. (Cheldne barbata, Cav.). Tall, 

 erect, branching, glabrous and more or less glaucous 

 herb: Ivs. firm, varying from lanceolate to linear, 

 entire, strong-veined, the radical ones oblanceolate or 

 spatulate: fl. -cluster long and open, narrow, the pe- 

 duncles about 2-3-fld.; fls. slender, about 1 in. long in 



wild forms, stpongly 2-lipped, varying from light pink 

 and flesh-color to carmine, the lower lip usually bearded. 

 Colo., south. B.R. 116; 25:21. R.H. 1896, p. 347. G. 

 32:75. Mn. 7:141. Showy perennial, common in cult. 



Var. Torreyi, Gray (P. Torreyi, Benth.), is a scarlet- 

 fld. form, with almost no beard on the lower lip; the 

 commonest form of the species hi cult. Hillsides, Utah, 

 Colo., south and to Texas. Excellent. 



Var. coccineus, Hort., is a scarlet-fld. horticultural 

 form. 



8. labr&sus, Hook. (P. barbatus var. labrdsus, Gray). 

 Much like P. barbatus, but narrower-lvd., the infl. 

 almost simply racemose and the corolla more slender, 

 light scarlet, not bearded, the limb longer; 3 lobes of 

 lower lip linear, spreading, half the length of tube, 

 equaling those of upper lip. Calif, and Low. Calif. 

 B.M. 6738. G.C. 11.20:537. A good perennial, 1-2 

 ft., making many sts. 



9. Eatonii, Gray. Sts. 1-2 ft. high: Ivs. lanceolate to 

 ovate, the upper ones partly clasping: fls. bright 

 carmine-red, in a simple and strict thyrse, the peduncles 

 1-3-fld.; calyx-lobes or sepals ovate-lanceolate; corolla 

 1 in. long, tubular, the throat naked and scarcely 

 enlarged, the lobes broadly oval and all much alike; 

 sterile filament sometimes minutely bearded. Utah, 

 Nev., New Mex., Ariz., and S. Calif. B.R. 10:14. F.S. 

 3:232 (as P. miniatus). 



10. isophyllus, Robs. St. somewhat decumbent at 

 base, erect, 2 ft. or so high, simple, purplish, pulverulent, 

 very leafy, with Ivs. in nearly equal pairs: Ivs. lanceo- 

 late, entire, thickish, glabrous, sessile, acute, margin 

 revolute: fls. in a long secund panicle, nodding, scarlet; 

 calyx deeply 5-parted; corolla about 1^ in. long, the 

 5-lobed limb erose-crenulate, the throat somewhat 

 enlarged and more or less white-puberulent. Mex. 



11. trifldrus, Heller. Perhaps to be entered at this 

 point: glabrous or nearly so to the infl., 2-3 ft.: lower 

 Ivs. spatulate or oblong, almost entire, with margined 

 petioles; upper Ivs. oblong to ovate: fls. rose-purple, 

 the peduncles glandular-pubescent and usually 3-fld.; 

 calyx-lobes lanceolate or oblong-lanceolate; corolla 

 about 1 in. long, the tube gradually dilated; sterile 

 filament glabrous. Cent. Texas. Under this name a 

 coral-red pentstemon with fls. lJ^-1% in. long is 

 offered abroad, said to be Mexican. 



12. Hartwegii, Benth. (P. gentianoides, Lindl.). Fig. 

 2860. Tall and erect (3-4 ft. high), somewhat branched, 

 the sts. dark purple: Ivs. lanceolate to lance-oblong- 

 linear, or the upper ones broader, sessile, glabrous and 

 entire: fl.-cluster somewhat pubescent, long and open, 

 the pedicels 3-6-fld.; fls. drooping, dark rich scarlet- 

 red, slightly curved, the limb somewhat 2-lipped and the 

 lobes acute. Cool regions in Mex. B.M. 3661. B.R. 

 24:3. Gn. 37, p. 603; 49, p. 406. G. 2:391. J.F. 3:231. 

 Gn.W.23:679. G.L. 17:397. G.W. 2, p. 157 (as var. 

 hybridus grandiflorus.) A fine garden plant, now much 

 modified by domestication. P. gentianoides, Poir., 

 and in F. S. 7 : 730, from S. Mex. and Guatemala, is 

 kept distinct by Krautter, the infl. being a long leafy 

 raceme rather than a loose naked panicle : fls. purplish. 



13. gloxinioides, Hort. A race of garden hybrids, 

 issuing largely from P. Hartwegii, the other most impor- 

 tant parent being P. Cobaea. Probably other species 

 have entered into the amalgamation. The group needs 

 critical study from the growing plants. The fls. are 

 large, with a broad nearly regular limb, and in many 

 colors. The plants are strong and floriferous. Fls. 

 sometimes measure 2 in. across. Some of the strains 

 bloom freely from seed the first year. Not hardy in 

 N. Y. unless very thoroughly protected; it is probably 

 better to winter it in deep coldframe. 



14. centranthifdlius, Benth. (Cheldne centranthi- 

 fdlia, Benth.). Plant strict and leafy, 1-3 ft. tall, very- 

 glaucous: Ivs. thick and entire, from ovate-lanceolate 



