. 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. COMPOS1TAE. Vol. 111. 9. Senecio frfgidus Loss. Arctic Senecio. Fig. 4018. Senecio frigidus Less. Linnuea 6: iSji. Perennial, more or less tomentose, or becoming glabrous when old: stem slender, o'-u' high, bearing a solitary head (rarely J or ,0 l'-l' broad. Basal and lower leaves spatulatc or obovate. i'-j' long, pcti- oled, obtuse, rcpaiul-deiUate or e
. 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. COMPOS1TAE. Vol. 111. 9. Senecio frfgidus Loss. Arctic Senecio. Fig. 4018. Senecio frigidus Less. Linnuea 6: iSji. Perennial, more or less tomentose, or becoming glabrous when old: stem slender, o'-u' high, bearing a solitary head (rarely J or ,0 l'-l' broad. Basal and lower leaves spatulatc or obovate. i'-j' long, pcti- oled, obtuse, rcpaiul-deiUate or entire; stem leaves oblong to linear-lanceolate, obtuse or acute, sessile, mostly entire, smaller; involucre broadly campanu- late, about 7" high, its bracts lanceolate, acute, with no exterior smaller ones; rays 10-10, o"-lo" long. 3-toothed, linear-oblong, or cum ate at the base; acbenes glabrous or sparingly pubescent; pappus white. Labrador and arctic America to Alaska, eastern Asia. Summer, Also in north- 10. Senecio Jacobaea L. Tansy Ragwort. Staggerwort. Fig. 4019. Senecio Jacobaea L. Sp. PI. 870. 1753. Perennial by short thick rootstocks, somewhat woolly, or glabrous; stems stout, simple, or branched above, 2°-4° high, very leafy. Stem leaves 2-3-pinnatifid, 2'S' long, the lower peti- oled, the upper sessile, the lobes oblong-cuncatc, dentate or incised; basal leaves lyrate-pinna- tifid; heads very numerous, 6"-8" broad, short- peduncled in large compact corymbs; involucre narrowly campanulate, about 2V high, its bracts linear-lanceolate, acute, green, or tipped with black, 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 to Maine and Ontario, and in ballast about New York and Philadelphia. Advcntive from Europe. Stave- wort. Cankerweed, Kettle-dock. St. James'-wort. Felonweed. Fairies'-horse. Ragweed. Saracen's-co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
