. 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 71. THISTLE FAMILY. 499 12. Bidens aristdsa (Michx.) Britton. Western Tickseed-Sunflower. Fig. 4516. Coreopsis aristosa Michx. Fl. Bor. Am. 2: 140. 1803. C. aristata Muhl.; Willd. Sp. PI. 3: 2253. 1804. B. aristosa Britton, Bull. Torr. Club 20: 281. 1893. Annual or biennial; stem much branched, i°-3° high. Leaves thin, slender-petioled, pubescent beneath,
. 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 71. THISTLE FAMILY. 499 12. Bidens aristdsa (Michx.) Britton. Western Tickseed-Sunflower. Fig. 4516. Coreopsis aristosa Michx. Fl. Bor. Am. 2: 140. 1803. C. aristata Muhl.; Willd. Sp. PI. 3: 2253. 1804. B. aristosa Britton, Bull. Torr. Club 20: 281. 1893. Annual or biennial; stem much branched, i°-3° high. Leaves thin, slender-petioled, pubescent beneath, the lower ones pinnately 5-7-divided, 3-6' long, the segments lanceolate, serrate, in- cised or pinnatifid, acuminate, narrowed at the base; upper leaves less divided, lanceolate, or merely lobed, sessile or short-petioled; heads nu- merous, slender-peduncled, 1-2' broad; outer bracts of the hemispheric involucre 8-10, linear or spatulate, usually ciliate, not surpassing the inner; rays 6-9, obtuse; achenes very flat, oblan- ceolate or obovate, upwardly ciliate and strigose- pubescent; pappus of 2, rarely 4, slender upward- ly or downwardly barbed awns, sometimes nearly as long as the achene, rarely wanting. In swamps and wet prairies, Ohio to Minnesota, south to Louisiana and Missouri; southeastern Penn- sylvania and Delaware. 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 may not perfectly resemble the original Britton, Nathaniel Lord, 1859-1934; Brown, Addison, 1830-1913. New York, Scribner
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
