. Common weeds of the Canadian Prairies;. Weeds. A much-branched annual to 2 feet high, sometimes having a fine spiderweb-hke covering on the stems. Leaves once or twice pinnately divided into very narrow segments, some of the uppermost entire. Flowers pale yellowish or cream-colored, numerous, in terminal panicles. Bracts of involucre spiny-margined with a ter- minal spine. Not yet reported on the prairies but a bad weed in south-central British Columbia. Centaurea maculosa Lam. SPOTTED KNAPWEED. An introduced biennial 1 to 3 feet high. Leaves pinnately divided into narrow lobes, excepting th
. Common weeds of the Canadian Prairies;. Weeds. A much-branched annual to 2 feet high, sometimes having a fine spiderweb-hke covering on the stems. Leaves once or twice pinnately divided into very narrow segments, some of the uppermost entire. Flowers pale yellowish or cream-colored, numerous, in terminal panicles. Bracts of involucre spiny-margined with a ter- minal spine. Not yet reported on the prairies but a bad weed in south-central British Columbia. Centaurea maculosa Lam. SPOTTED KNAPWEED. An introduced biennial 1 to 3 feet high. Leaves pinnately divided into narrow lobes, excepting those of the inflorescence, which are smaller and entire. Flower heads purplish or occasionally white, on long stems. Bracts of involucre tipped with a short, dark fringe, not stiff and spiny. A common weed of south- central British Columbia, may be expected eastwards. Centaurea repens L. RUSSIAN KNAPWEED. 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
