. 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. 2. Nabalus albus (L.) Hook. Rattlesnake-root. White Lettuce. Fig. 4111. Prenanthes alba L. Sp. PI. 798. albus Hook. Fl. Bor. Am. i : 294. 1833. Glabrous and glaucous; stem commonly purple,2°-5° high. Leaves hastate, ovate, cordate, den-ticulate, dentate, lobed, or palmately divided, orthe upper lanceolate, entire, thicker than those ofthe preceding species, the l
. 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. 2. Nabalus albus (L.) Hook. Rattlesnake-root. White Lettuce. Fig. 4111. Prenanthes alba L. Sp. PI. 798. albus Hook. Fl. Bor. Am. i : 294. 1833. Glabrous and glaucous; stem commonly purple,2°-5° high. Leaves hastate, ovate, cordate, den-ticulate, dentate, lobed, or palmately divided, orthe upper lanceolate, entire, thicker than those ofthe preceding species, the larger sometimes 8long; heads numerous, pendulous, 8-15-flowered,about 3 broad, paniculate, or thyrsoid, and oftenin axillary clusters; involucre glabrous, or with afew scattered hairs, glaucous, 5-7 high, aboutI3 thick, its principal bracts about 8, purplish,with minute outer ones; flowers greenish or jxl-lowish white, fragrant; pappus cinnamon-brown. In woods, Maine and Ontario to Manitoba, Sas-katchewan, Georgia, Kentuck-y, Wisconsin and NorthDakota. Lions-foot. White cankerweed. Wild Joy-leaf. Cancer-weed. 3. Nabalus serpentarius (Pursh) Gall-of-the-Earth. Fig. 4
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
