. 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. 2. Nabalus albus (L.) Hook. Rattlesnake- root. White Lettuce. Fig. 4111. L. Sp. PI. 798. 1753. Nabalus albus Hook. Fl. Bor. Am. 1: 294. 1833. Glabrous and glaucous; stem commonly purple, 2°-S° high. Leaves hastate, ovate, cordate, den- ticulate, dentate, lobed, â or palmately divided, or the upper lanceolate, entire, thicker than those of the
. 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. 2. Nabalus albus (L.) Hook. Rattlesnake- root. White Lettuce. Fig. 4111. L. Sp. PI. 798. 1753. Nabalus albus Hook. Fl. Bor. Am. 1: 294. 1833. Glabrous and glaucous; stem commonly purple, 2°-S° high. Leaves hastate, ovate, cordate, den- ticulate, dentate, lobed, â or palmately divided, or the upper lanceolate, entire, thicker than those of the preceding species, the larger sometimes 8' long; heads numerous, pendulous, 8-15-flowered, about 3" broad, paniculate, or thyrsoid, and often in axillary clusters; involucre glabrous, or with a few scattered hairs, glaucous, $"-j" high, about ii" thick, its principal bracts about 8, purplish, with minute outer ones; flowers greenish or yel- lowish white, fragrant; pappus cinnamon-brown. In woods, Maine and Ontario to Manitoba, Sas- katchewan, Georgia, Kentucky, Wisconsin and North Dakota. Lion's-foot. White cankerweed. Wild lettuce. Milk-weed. Joy-leaf. Cancer-weed. 3. Nabalus serpentarius (Pursh) Hook. Lion's-foot. Gall-of-the-Earth. Fig. 4112. Prenanthes serpentaria Pursh, Fl. Am. Sept. 499. pi. 24. 1814. Nabalus integrifolius Cass. Diet. Sci. Nat. 34: 95. 1825. Nabalus serpentarius Hook. Fl. Bor. Am. 1: 294. 1833. Glabrous or sparingly pubescent, green; stem stout or slender, not glaucous, i°-4° high. Leaves rather firm, similar to those of the preceding species, equally variable in outline, pinnatifid or pinnately lobed, palmately divided, or merely dentate, or entire; inflorescence paniculate, the branches divaricate, upcurved; heads numerous, about 3" broad, 8-12-flowered, pendulous, panicu- late, and commonly also in axillary clusters; in- volucre more or less bristly-hispid, rarely gla- brous, green or purplish, about \\&qu
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
