. 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. 420 COMPOSITAE. Vol. 34. Aster laevis L. Smooth Aster. Fig. 43I5- Aster laevis L. Sp. PI. 876. 1753. Aster laevis amplifolius Porter, Mem. Torr. Club 5: 324. 1894. Aster laevis potomacensis Burgess: Britt. & Brown, 111. Fl. 3: 369. 1898. Stem usually stout, glabrous, often glaucous, 2°-4° high, branched or simple. Leaves thick, en- tire, or serrate, g
. 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. 420 COMPOSITAE. Vol. 34. Aster laevis L. Smooth Aster. Fig. 43I5- Aster laevis L. Sp. PI. 876. 1753. Aster laevis amplifolius Porter, Mem. Torr. Club 5: 324. 1894. Aster laevis potomacensis Burgess: Britt. & Brown, 111. Fl. 3: 369. 1898. Stem usually stout, glabrous, often glaucous, 2°-4° high, branched or simple. Leaves thick, en- tire, or serrate, glabrous, slightly rough-margined, the upper all sessile and usually cordate-clasping, lanceolate, oblong-lanceolate, oblanceolate or ovate, acute or obtusish, i'-4' long, 4"-2' wide, the basal and lower gradually narrowed into winged petioles, those of the branches often small and bract-like; heads usually numerous, about 1' broad; involucre campanulate, its bracts rigid, acute, appressed, green-tipped, imbricated in sev- eral series; rays 15-30, blue or violet; pappus tawny; achenes glabrous or nearly so. Usually in dry soil, Maine to Ontario, Virginia, Alabama, Louisiana, Saskatchewan, Missouri and Colorado. Races differ in leaf-form. 35. Aster concinnus Willd. Narrow-leaved Smooth Aster. Fig. 4316. Aster concinnus Willd. Enum. 884. 1809. Similar to narrow-leaved forms of Aster laevis, and perhaps a race of that species, glabrous, or sparingly pubescent above, not glaucous; stem paniculately branched, 1 "-3° high. Leaves light green, lanceolate to linear, entire, or sometimes ser- rulate, the upper sessile, somewhat clasping, i's' long, the lower and basal ones spatulate, or oblong, narrowed into margined petioles, sometimes coarsely toothed; heads usually numerous, about 10" broad; bracts of the involucre with rhomboid acute herba- ceous tips; rays violet to purple. Woodlands, Connecticut to Pennsylvania, Virginia, North Carolina, Missouri and Ar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
