. 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. Genus 66. THISTLE FAMILY. 483 15. Helianthus grosse-serratus Martens. Saw-tooth Sunflower. Fig. 4475. Helianthus grosse-serratus Martens, Sel. Sem. Hort. Loven. 1839. Perennial by fleshy roots and slender rootstocks; stems glabrous, glaucous, branched above, 6°-io° high, the branches usually strigose-pubescent. Leaves long-lanceolate, slender-petioled, the uppe
. 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. Genus 66. THISTLE FAMILY. 483 15. Helianthus grosse-serratus Martens. Saw-tooth Sunflower. Fig. 4475. Helianthus grosse-serratus Martens, Sel. Sem. Hort. Loven. 1839. Perennial by fleshy roots and slender rootstocks; stems glabrous, glaucous, branched above, 6°-io° high, the branches usually strigose-pubescent. Leaves long-lanceolate, slender-petioled, the upper alternate, the lower opposite, long-acuminate, narrowed at the base, sharply serrate, or merely denticulate, the up- permost entire, rough above, densely puberulent or canescent beneath, 4'-8' long, i'-i' wide; heads sev- eral or numerous, ii'-3' broad; involucre hemi- spheric, its bracts squarrose, narrowly lanceolate, acuminate, hirsute; chaff linear-oblong, pubescent at the summit, acute, often 3-toothed; disk yellowish; rays 10-20, deep yellow; achenes nearly glabrous; pappus of 2 lanceolate awns. In dry soil, Maine to Long Island, Pennsylvania, On- tario, South Dakota, Missouri, Kansas and Texas. 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 Britton, Nathaniel Lord, 1859-1934; Brown, Addison, 1830-1913. New York, Scribner
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
