. Common weeds of the Canadian Prairies;. Weeds. Centaurea diffusa Lam DIFFUSE KNAPWEED. 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. Please note that these images are extracted from scanned
. Common weeds of the Canadian Prairies;. Weeds. Centaurea diffusa Lam DIFFUSE KNAPWEED. 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. 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
