. Common weeds of the Canadian Prairies;. Weeds. Rumex venosus Pursh SAND DOCK A perennial with running, woody rootstocks and branched stems. Sheathing stipules or ocrea whitish and papery, very noticeable. Leaves pale-green, 2 to 5 inches long and nearly half as wide. Calyx valves in fruit very conspicuous, almost H inches broad, bright red to pink. Found on sandy soils throughout the Salsola pestifer A. Nels. RUSSIAN-THISTLE An introduced annual 1 to 2 feet high. Early leaves 1 inch long, dark-green, and thread-like; later leaves shorter and broader, narrowing to a hard, sharp po
. Common weeds of the Canadian Prairies;. Weeds. Rumex venosus Pursh SAND DOCK A perennial with running, woody rootstocks and branched stems. Sheathing stipules or ocrea whitish and papery, very noticeable. Leaves pale-green, 2 to 5 inches long and nearly half as wide. Calyx valves in fruit very conspicuous, almost H inches broad, bright red to pink. Found on sandy soils throughout the Salsola pestifer A. Nels. RUSSIAN-THISTLE An introduced annual 1 to 2 feet high. Early leaves 1 inch long, dark-green, and thread-like; later leaves shorter and broader, narrowing to a hard, sharp point. Flowers in axils of upper leaves. Seed with membranous wings. Plants usually turning reddish at maturity, breaking off and rolling with the wind. Very common across 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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