. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. COMPOSITAE — THISTLE FAMILY — BULL THISTLE 799. Fig. 456. Canada Thistle (Cirsium arvense). Common in the North, causes inflamma- tion. (Charlotte M. King). decurrent on the stem with prickly wings, deeply pinnatifid, the lobes with rigid prickly points, upper face roughened with short hairs, lower face with cottony tomentum; heads 1^4 to 2 inches high, bracts of the involucre lanceolate, rigid when young, more flexible with age, lon
. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. COMPOSITAE — THISTLE FAMILY — BULL THISTLE 799. Fig. 456. Canada Thistle (Cirsium arvense). Common in the North, causes inflamma- tion. (Charlotte M. King). decurrent on the stem with prickly wings, deeply pinnatifid, the lobes with rigid prickly points, upper face roughened with short hairs, lower face with cottony tomentum; heads 1^4 to 2 inches high, bracts of the involucre lanceolate, rigid when young, more flexible with age, long attenuated prickly pointed spreading tips, arachnoid woolly; flowers perfect; anther tips acute; filaments pubescent; achenes smooth; pappus of numerous plumose bristles. Distribution. Distribution in North America in fields and waste places from Newfoundland to Georgia, Missouri, Kansas to Nebraska, the Dakotas, Montana, Washington, Oregon and Idaho. Naturalized from Europe, native also to 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 Pammel, L. H. (Louis Hermann), 1862-1931. Cedar Rapids, Ia. , The Torch Press
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectpoisonousplants
