. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 183 SCROPHULARIACEAE. Vol. III. 9. PENTSTEMON Mitchell; Soland. in Ait. Hort. Kew. 3: 511. 1789. Perennial herbs, mostly branched from the base only, with opposite or rarely verticillate leaves, or the upper occasionally alternate, and large, usually showy, blue purple red or white flowers, in terminal thyrses, panicles, or racemes. Calyx 5-parted, the segments
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 183 SCROPHULARIACEAE. Vol. III. 9. PENTSTEMON Mitchell; Soland. in Ait. Hort. Kew. 3: 511. 1789. Perennial herbs, mostly branched from the base only, with opposite or rarely verticillate leaves, or the upper occasionally alternate, and large, usually showy, blue purple red or white flowers, in terminal thyrses, panicles, or racemes. Calyx 5-parted, the segments imbricated. Corolla irregular, the tube elongated, more or less enlarged above, the limb 2-lipped; upper lip 2-lobed; lower lop 3-lobed. Stamens 5, included, 4 of them antheriferous and didy- namous, the fifth sterile, as long as or shorter than the others; anther-sacs divergent or connivent. Style filiform; stigma capitate. Capsule ovoid, oblong, or globose, septicidally dehiscent. Seeds numerous, angled or even, wingless. [Greek, five stamens.] About 100 species, natives of North America and Mexico. cens Soland. Type species: Pentstemon pubes- lanceolate or linear- is canescens. P. pallidas. P. erianthera. P. albidus. * More or less pubescent or glandular, at least the calyx and pedicels. Corolla l/4'-ilA' long; leaves entire, serrate, or denticulate. Stem pubescent or puberulent nearly or quite to the base. Thyrsus open, panicle-like. Corolla large, over 10" long; stem hirsute or canescent, often glandiilar. Corolla densely bearded in the throat; outer calyx-segments ovate or ovate-lanceolate. 1. P. hirsutus. Corolla scarcely bearded in the throat; outer calyx-segments lanceolate. Corolla small, less than 10" long; stem puberulent. Thyrsus narrow, raceme-like or spike-like. Corolla-tube abruptly enlarged; sterile filament densely woolly. Corolla-tube gradually enlarged; sterile filament slightly bearded. Only the inflorescence, or pedicels, or calyx pubescent. Thy
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
