. Common weeds of the Canadian Prairies;. Weeds. A stout-stemmed, much-branched perennial to 6 feet high, from a swollen, bulbous root- stock, which is divided horizontally into cham- bers. Leaves double-pinnate, with lanceolate to linear-lanceolate leaflets 2 to 3i inches long, sharply toothed. Base of leafstalk swoUen and sheathing the stem. Flowers small, white, in compound umbels. Common in wet and marshy areas. Very poisonous to stock and Cirsium arvense (L.) Scop. CANADA THISTLE A persistent perennial with deep running rootstocks, usually growing in large patches. Upper leaves s
. Common weeds of the Canadian Prairies;. Weeds. A stout-stemmed, much-branched perennial to 6 feet high, from a swollen, bulbous root- stock, which is divided horizontally into cham- bers. Leaves double-pinnate, with lanceolate to linear-lanceolate leaflets 2 to 3i inches long, sharply toothed. Base of leafstalk swoUen and sheathing the stem. Flowers small, white, in compound umbels. Common in wet and marshy areas. Very poisonous to stock and Cirsium arvense (L.) Scop. CANADA THISTLE A persistent perennial with deep running rootstocks, usually growing in large patches. Upper leaves stalkless, clasping the stem, 2 to 5 inches long, deeply cut into prickly, toothed segments; basal leaves sometimes stalked. Flower heads with purple, occasionally white, florets. A common introduced weed across the prairies. 31. 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 Canada. Dept. of Agriculture. Research Branch. Ottawa, Queen's Printer
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Keywords: ., bookcentury1900, bookpublisherottawaqueensprin, booksubjectweeds
