. Budd's flora of the Canadian Prairie Provinces. Botany; Botanique. FOUR-PETALED (Mustard) FIVE-PETALED (Chickweed) MANY-PETALED (Purple coctus). 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 work.. [Ottawa] : Research Branch, Agriculture Canada
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