. 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. 10. Polygonum erectum L. Erect Knotweed. Fig. 1624. Polygonum erectum L. Sp. PI. 363. 1753. Annual, glabrous, yellowish-green, stem erect or ascending, 8-2° high, terete, nearly simple or much branched. Leaves oval, oblong or obovate, subses- sile or short-petioled, 3"-i8" long, obtuse or sub- acute at the apex, conspicuously jointed to the ocreae; oc
. 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. 10. Polygonum erectum L. Erect Knotweed. Fig. 1624. Polygonum erectum L. Sp. PI. 363. 1753. Annual, glabrous, yellowish-green, stem erect or ascending, 8-2° high, terete, nearly simple or much branched. Leaves oval, oblong or obovate, subses- sile or short-petioled, 3"-i8" long, obtuse or sub- acute at the apex, conspicuously jointed to the ocreae; ocreae oblique, soon lacerate, silvery when young; flowers 1-2 together in the axils; sepals greenish-yellow or yellowish, enlarged in fruit; stamens 6 (sometimes 5); achene ovoid-pyramidal, 3-angled, i"-ii" long, dull, invested by the calyx, or the apex slightly protruding. In moist or dry soil, Ontario to the Northwest Terri- tory, Tennessee and Arkansas. July-Sept. 11. Polygonum ramosissimum Michx. Bushy Knotweed. Fig. 1625. P. ramosissimum Michx. Fl. Bor. Am. 1: 237. 1803. Annual, yellowish or yellowish-green, glabrous, stem erect or ascending, usually very much branched, slender, striate, usually rigid, 4'-4° tall. Leaves lanceolate or linear-oblong, short-petioled, 3"-2o" long, acute or acuminate at both ends; ocreae few- nerved, becoming deeply lacerate; flowers several together in the axillary clusters, short-pedicelled; sepals S or 6, yellow or yellowish, i"-il" long; stamens 6 or fewer; achene 3-angled, acute, some- times slightly protruding beyond the calyx, nearly li"-2" long, black. In saline soil, Minnesota to the Northwest Territory, New Mexico and California. July-Sept. Polygonum camporum Meisn., admitted into our first edition, is here omitted as not certainly known within our Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
