. 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. r stout, glabrous and somewhatglaucous; stem striate, 2°-6° high. Leaves thickish,glabrous and glaucous, the lower and basal ones oval,oblong, oblanceolate, or obovate, dentate, denticulate,pinnatifid or pinnately lobed, 4-8 long, mostly ob-tuse, tapering into long margined petioles; upperleaves sessile, smaller and partly clasping, lanceo-late to ovate-lanceolate, denticulat
. 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. r stout, glabrous and somewhatglaucous; stem striate, 2°-6° high. Leaves thickish,glabrous and glaucous, the lower and basal ones oval,oblong, oblanceolate, or obovate, dentate, denticulate,pinnatifid or pinnately lobed, 4-8 long, mostly ob-tuse, tapering into long margined petioles; upperleaves sessile, smaller and partly clasping, lanceo-late to ovate-lanceolate, denticulate, entire, or pin-natifid, mostly acute; heads very numerous, erect,spreading, or slightly drooping, 12-16-flowered, 2-t,broad, in a long narrow thyrsus; involucre oblong-cylindric, hirsute, 5-6 long, iV-2\ thick, longerthan the hirsute peduncle, its principal bracts 8-10,with several small outer ones; flowers purplish;pappus straw-color. In moist open places. New Brunswick and Quebec toMaine, Manitoba, Alberta, southern New York, NewJersey, Iowa, Missouri and Colorado. Prenanthes mainensis A. Gray, from northern Maine and Ntw Brunswick, is probably a hybridbetween A^. racemosus and A^. trifoliolatus^. 338 CICHORIACEAE. Vol. III. 10. Nabalus crepidineus (Michx.) DC. Corymbed Rattlesnake-root.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
