Pentstemon glaber

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Standard Cyclopedia of Horticulture

Pentstemon glaber, Pursh (P. Gordonii, Hook. P. speciosus, Douglas). Erect herb (1-2 ft.), with simple sts. glabrous and somewhat glaucous: lvs. oblong-lanceolate to ovate- lanceolate: fl. 1 in. or more long, broad, and wide at the mouth, bright blue to purplish. Missouri River, west. B.M. 1672 (as P. glabra) and 4319. B.R. 1270. Gn. 27, p.42. R.H. 1895. p. 383; 1896, p. 347. G.M. 44:563.—A very handsome plant, known by its large blue fls. Variable.

Var. cyananthus, Gray (P. cyananthus, Hook. P. cyan-thus, Hort.). Tall and less glaucous, the lvs. broader (ovate or cordate-ovate to lance-ovate): fl.-cluster dense; fls. bright blue. Rocky Mts., Colo., Mont., Utah. B.M. 4464. F.S. 6:157. R.H. 1851: 453.—Preferable to the type. By many considered to be specifically distinct.

Var. alpinus, Gray (P. alpinus, Torr.). A foot or less high: st.-lvs. narrow- or broad-lanceolate: thyrse short and few-fld. High plains and mountains, Rocky Mts. Kept distinct from P. glaber by some authors. CH


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