. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1016. T. erythrospermum. Heads and leaf-tip x %. 99. s6NCHUS [Tourn.] L. Sow Thistle Heads many-flowered, becoming tumid at base. Involucre more or less im- bricated. Achenes oboompressed, ribbed or striate, not beaked; pappus copious, of very white exceedingly soft and fine bristles mainly falling together. ^Leafy-stemmed coarse weeds, chiefly smooth and glaucous, with corymbed or umbellate heads of yellow flowers produced in summer and autumn.
. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. 1016. T. erythrospermum. Heads and leaf-tip x %. 99. s6NCHUS [Tourn.] L. Sow Thistle Heads many-flowered, becoming tumid at base. Involucre more or less im- bricated. Achenes oboompressed, ribbed or striate, not beaked; pappus copious, of very white exceedingly soft and fine bristles mainly falling together. ^Leafy-stemmed coarse weeds, chiefly smooth and glaucous, with corymbed or umbellate heads of yellow flowers produced in summer and autumn. (The ancient Greek name.) * Perennial, with creeping rootstocks; flowers bright yellow, in large heads. 1. S. ARVENSis L. (Field S.) Leaves runcinate- pinnatifid, spiny-toothed, clasping by a heart-shaped base ; peduncles and involucre bristly ; achenes trans- versely'wrinkled on the ribs. — Roadsides, fields, and gravelly shores, Nfd. and N. S. to N. J., w. to the Rocky Mts., commonest northw. (Nat. from Eu.) « * Annual; flowers pale yellow. 2. S. OLERicEus L. (Common S.) Stem-leaves runcinate-pinnatifid, or rarely undivided, slightly toothed with soft spiny teeth, clasping by a heart- S3AY'S MANUAL 55. lOlT. 8. oleraceus. Leaf X %. Achene x 1^.. 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 Gray, Asa, 1810-1888; Robinson, Benjamin Lincoln, 1864-1935; Fernald, Merritt Lyndon, 1873-1950. New York, American Book Co
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