. 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. laska. Also in north-eastern Asia. Summer. 10. Senecio Jacobaea L. Tansy Ragwort. Staggerwort. Fig. Jacobaea L. Sp. PI. 870. 1753. Perennial by short thick rootstocks, somewhatwoolly, or glabrous; stems stout, simple, orbranched above, 2°-4° high, very leafy. Stemleaves 2-3-pinnatifid, 2-8 long, the lower peti-oled, the upper sessile, the lobes oblong-cuneate,den
. 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. laska. Also in north-eastern Asia. Summer. 10. Senecio Jacobaea L. Tansy Ragwort. Staggerwort. Fig. Jacobaea L. Sp. PI. 870. 1753. Perennial by short thick rootstocks, somewhatwoolly, or glabrous; stems stout, simple, orbranched above, 2°-4° high, very leafy. Stemleaves 2-3-pinnatifid, 2-8 long, the lower peti-oled, the upper sessile, the lobes oblong-cuneate,dentate or incised; basal leaves lyrate-pinna-tifid; heads very numerous, 6-8 broad, short-peduncled in large compact corymbs; involucrenarrowly campanulate. about 2J high, its bractslinear-lanceolate, acute, green, or tipped withblack, usually with a few subulate outer ones;rays 12-15; achenes of the disk-flowers pubes-cent, those of the rays glabrous; pappus white. In waste places, Newfoundland and Nova Scotia toMaine and Ontario, and in ballast about New Yorkand Philadelphia. Adventive from Europe. Stave-wort. Cankerweed Kettle-dock. St. Fairies-horse. Ragweed. Saracens-com-pass.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
