. 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. Genus 29. THISTLE FAMILY, 4. Boltonia decurrens (T. & G.) Wood. Clasping-leaved Boltonia. Fig. 4278. Bol'.onia glastifolia var. (1) decurrens T. & G. Fl. N. A. 2: 188. 1841. Boltonia decurrens Wood, Bot. & Flor. 166. 1870. Boltonia asteroides var. decurrens Engelm.; A. Gray, Syn. Fl. 1: Part 2, 166. 1884. Stout, 3°-6° high, branched above. Leaves ob
. 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. Genus 29. THISTLE FAMILY, 4. Boltonia decurrens (T. & G.) Wood. Clasping-leaved Boltonia. Fig. 4278. Bol'.onia glastifolia var. (1) decurrens T. & G. Fl. N. A. 2: 188. 1841. Boltonia decurrens Wood, Bot. & Flor. 166. 1870. Boltonia asteroides var. decurrens Engelm.; A. Gray, Syn. Fl. 1: Part 2, 166. 1884. Stout, 3°-6° high, branched above. Leaves oblong- lanceolate or elongated-lanceolate, mucronate at the apex, those of the stem decurrent and sagittate at the base, 3'-6' long, 6"-8" wide, those of the branches smaller and merely sessile or some of them also decurrent; heads 2}"-3" high; involucre hemi- spheric; rays about 3" long, violet or purple; pap- pus of several or numerous short scales and 2 very slender bristles. In wet prairies, Illinois and Missouri. Perhaps a race of B. 30. SERICOCARPUS Nees, Gen. & Sp. Ast. 148. 1833. Erect perennial herbs, with alternate leaves, and middle-sized heads of both tubular and radiate flowers, in terminal cymose panicles. Involucre ovoid, oblong, or campanulate, its bracts coriaceous, with herbaceous or squarrose tips, imbricated in several series, the outer shorter. Receptacle small, foveolate. Ray-flowers white, pistillate. Disk-flowers mostly perfect, their corollas tubular, narrow, yellowish or purplish, 5-lobed. Anthers obtuse and entire at the base. Style-branches with lanceolate-subulate appendages. Achenes slightly compressed, linear-oblong, i-nerved on each side, pubescent. Pappus of numerous capillary scabrous bristles, the outer usually shorter. [Greek, silky fruit, referring to the achenes.] Four known species, natives of North America. Besides the following, another occurs on the northwestern coast of North Americ
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
