. 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. 15. Pentstemon angustifolius Pursh. Pale-blue Beard-tongue. Fig. 3769. P. angustifolius Pursh, Fl. Am. Sept. 738. 1814. Pentstemon coeruleus Nutt. Gen. 2: 52. 1818. Glabrous and glaucous; stem slender, erect, leafy, 6-1$' high. Leaves all linear or linear- lanceolate, entire, the lower narrowed into petioles, obtusish at the apex, the upper ses- sile, acute, ll
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 15. Pentstemon angustifolius Pursh. Pale-blue Beard-tongue. Fig. 3769. P. angustifolius Pursh, Fl. Am. Sept. 738. 1814. Pentstemon coeruleus Nutt. Gen. 2: 52. 1818. Glabrous and glaucous; stem slender, erect, leafy, 6-1$' high. Leaves all linear or linear- lanceolate, entire, the lower narrowed into petioles, obtusish at the apex, the upper ses- sile, acute, ll'-2h' long, li"-2" wide; thyrsus narrow, spike-like, mostly dense; bracts lan- ceolate, acuminate; pedicels very short; ca- lyx-segments linear-lanceolate, acuminate, z"-Z" long; corolla blue, or nearly white, 8"-io" long, the tube gradually enlarged, the limb somewhat 2-lipped; sterile filament bearded at the summit. In dry soil, western Nebraska to North Da- kota and Montana. May-July. 16. Pentstemon Haydeni S. Wats. Hay- den's Beard-tongue. Fig. 3770. P. Haydeni S. Wats. Bot. Gaz. 16: 311. 1891. Glabrous, not at all glaucous or slightly so; stem decumbent, simple or branched, leafy, l°-2° high. Leaves linear or elongated-lanceolate, en- tire, sessile and slightly clasping, acute, acumi- nate, or the lowest obtusish at the apex, 2'-$' long, 1 "-5" wide; thyrsus narrow, dense; bracts ovate or ovate-lanceolate, large, cordate-clasp- ing, acute, or acuminate; fruiting pedicels a"-3" long; calyx-segments lanceolate, striate-nerved, acuminate, 3"-S" long; corolla blue, 1' long or more, the tube broadly dilated above the calyx, the limb nearly equally 5-lobed; capsule acute, twice as long as the calyx. In moist soil, Nebraska, Kansas and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations ma
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
