. 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. Large- 8. Lactuca pulchella (Pursh) DC flowered Blue Lettuce. Fig. 4075. Sonchus pidcheUus Pursh, Fl. Am. Sept. 502. integrifolia Nutt. Gen. 2: 124. pulchella DC. Prodr. 7: 134. 1838. Perennial, glabrous throughout, somewhat glau-cous ; stem rather slender, leafy up to the corym-bose-paniculate inflorescence, i°-3° high. Leaveslinear-lanceolate, lanc
. 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. Large- 8. Lactuca pulchella (Pursh) DC flowered Blue Lettuce. Fig. 4075. Sonchus pidcheUus Pursh, Fl. Am. Sept. 502. integrifolia Nutt. Gen. 2: 124. pulchella DC. Prodr. 7: 134. 1838. Perennial, glabrous throughout, somewhat glau-cous ; stem rather slender, leafy up to the corym-bose-paniculate inflorescence, i°-3° high. Leaveslinear-lanceolate, lanceolate or oblong, acute, en-tire, dentate, lobed or pinnatifid, those of the stemsessile or partly clasping, 2-8 long; 2-i8 wide,the lowest and basal ones sometimes petioled;heads mostly numerous, 6-io broad; branchesand peduncles scaly; involucre well imbricated,8-io high, its outer bracts successively shorter,ovate-lanceolate; rays bright blue or violet;achenes oblong-lanceolate, flat, twice as long astheir tapering beaks; pappus white. In moist soil, western Ontario to British Columbia,Michigan, Iowa, Kansas, New Mexico and Lactuca campestris Greene, of the prairie region,is described as
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
