. 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. 486 COMPOSITAE. Vol. 24. Helianthus laetiflorus Pers. Showy Sun-flower. Fig. 4484. Helianthus laetiflorus Pers. Syn. 2: 476. 1807. Perennial; stem scabrous or hispid, leafy, 4°-8° oval-lanceolate or ovate-lanceolate, short-peti-oled, 3-nerved, rough on both sides, narrrowed at thebase, acute or acuminate at the apex, serrate or serru-late, 4-io long, i-ij wi
. 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. 486 COMPOSITAE. Vol. 24. Helianthus laetiflorus Pers. Showy Sun-flower. Fig. 4484. Helianthus laetiflorus Pers. Syn. 2: 476. 1807. Perennial; stem scabrous or hispid, leafy, 4°-8° oval-lanceolate or ovate-lanceolate, short-peti-oled, 3-nerved, rough on both sides, narrrowed at thebase, acute or acuminate at the apex, serrate or serru-late, 4-io long, i-ij wide, the upper often alter-nate ; heads usually several, 2-4 broad, mostly short-peduncled; bracts of the hemispheric involucre ovate-lanceolate, or oblong-lanceolate, imbricated in only 2 or3 series, ciliate, otherwise nearly glabrous, appressed orbut little spreading, shorter than or equalling the yellowdisk; rays 15-25, showy; chaff of the receptacle entire,or sometimes 3-toothed. On prairies and barrens, Pennsylvania to Minnesota. Re-corded as adventive in Massachusetts. 25. Helianthus tomentosus Michx. Woolly Sunflower. Fig. tomentosus Michx. Fl. Bor. Am. 2: 141. 1803. Perennial; stem stout, hirsute or hispid, espec
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
