. 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 102nd meridian. 2. Erigeron asper Nutt. Rough 4362. Erigeron asper Nutt. Gen. 2: 147. glabellus Nutt. loc. cit. 1818. Perennial by a woody root; stem simple, orbranched above, more or less pubescent, sometimeshirsute. 6-24 high. Leaves glabrous, pubescent orciliate, entire, the basal ones spatulate. obtuse, 2-4long, 3-i wide, narrowed into margined petioles;stem l
. 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 102nd meridian. 2. Erigeron asper Nutt. Rough 4362. Erigeron asper Nutt. Gen. 2: 147. glabellus Nutt. loc. cit. 1818. Perennial by a woody root; stem simple, orbranched above, more or less pubescent, sometimeshirsute. 6-24 high. Leaves glabrous, pubescent orciliate, entire, the basal ones spatulate. obtuse, 2-4long, 3-i wide, narrowed into margined petioles;stem leaves oblong-lanceolate or linear-lanceolate,obtuse or acute, the upper smaller; heads several orsolitary, slender-peduncled. 1-2 broad; involucrehemispheric, its bracts linear, acute, hirsute or pu-bescent; rays 100-150, very narrow, violet, purple,or nearly white, 4-7 long; pappus double, theouter row of bristles much shorter than the inner. u ^ — >.^ ,.„ ^^ ^^, soil, Minnesota to Wisconsin, Nebraska, Manitoba, Utah and New Mexico. Racesdiffer in pubescence. Genus 35. THISTLE FAMILY 3. Erigeron subtrinervis Rydberg. Three-nerved Fleabane. Fig. 4363. Erigeron glabellus var. mollis A. Gray, Proc. 1863: 64. 1864. Not E. mollis D. Don. Erigeron subtrinervis Rydberg, Mem. Torr. Club 5 :328. 1894. Similar to the preceding species, perennial bya woody root, finely pubescent all over; stemsleafy to the inflorescence. Leaves entire, thin, thebasal and lower ones oblanceolate to oblong, ob-tuse or acute, petioled, the upper lanceolate orovate-lanceolate, sessile or somewhat clasping,acute, rather distinctly 3-nerved; heads I-iibroad, corymbose, or rarely solitary; involucrehemispheric, hirsute ; rays numerous, blue to pink;pappus double, the outer bristles very short. In dry soil, South Dakota to Wyoming, Nebraska,Utah and New Mexico. July-Sept.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
