. 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. inear-lanceolate or oblong, nearly all entire. 14. E. ramosus. Pappus of the ray-flowers and disk-flowers alike; plant hirsute. 15. E. tenuis. ttt Stem leafless or nearly so ; heads yi broad, corymbose. 16. E. vermis.**Rays inconspicuous or short; a row of tubular pistillate flowers inside the row of rays.•^*-^ 17. E. acris. I. Erigeron uniflorus L. Arctic Erigeron. Fig. 4361
. 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. inear-lanceolate or oblong, nearly all entire. 14. E. ramosus. Pappus of the ray-flowers and disk-flowers alike; plant hirsute. 15. E. tenuis. ttt Stem leafless or nearly so ; heads yi broad, corymbose. 16. E. vermis.**Rays inconspicuous or short; a row of tubular pistillate flowers inside the row of rays.•^*-^ 17. E. acris. I. Erigeron uniflorus L. Arctic Erigeron. Fig. 4361. Erigeron uniflorus L. Sp. PI. 864. 1753. Perennial by short branching rootstocks; stems slender,single or .tufted, more or less pubescent, simple, erect, I-iohigh. Basal leaves petioled. spatulate, obtuse, entire, i-2long; stem leaves sessile, lanceolate or linear-lanceolate, en-tire, acute or obtuse; head solitary, peduncled, i-i broad;rays about 100, purple or purplish, 2-^ long; involucrehemispheric, its bracts linear-lanceolate, acute, copiouslywoolly; pappus simple. Labrador and Arctic America to Alaska, south in the RockyMountains to Colorado and in the Sierra Nevada to in Europe. 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 Wiscon
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
