. Bulletin. Agriculture. WEED SEEDS FOUND WITH BLUEGRASS SEEDS. 35 Anthemis cotula L. DOG FENNEL, MAYWEED. Seeds (akenes) cylindrical, broadly club-shaped, 1^2 mm. long, straight or curved; surface dull and usually roughened by many small tubercles more or less distinctly arranged in ten rows, indistinctly few-tubercled or nearly smooth, but commonly more or less evidently ten-ribbed; base tipped by the rounded, whitish scar; apex rounded or slightly pointed; color varying from light to dark brown. (Fig. 25.) Found occasionally, but never abundantly, in both American and European bluegrass see
. Bulletin. Agriculture. WEED SEEDS FOUND WITH BLUEGRASS SEEDS. 35 Anthemis cotula L. DOG FENNEL, MAYWEED. Seeds (akenes) cylindrical, broadly club-shaped, 1^2 mm. long, straight or curved; surface dull and usually roughened by many small tubercles more or less distinctly arranged in ten rows, indistinctly few-tubercled or nearly smooth, but commonly more or less evidently ten-ribbed; base tipped by the rounded, whitish scar; apex rounded or slightly pointed; color varying from light to dark brown. (Fig. 25.) Found occasionally, but never abundantly, in both American and European bluegrass If 5 4 b Fig. 25.—Seeds of dog ienneli Anthemis eoUda): a, side views; 6, natural size of seeds. Chenopodium album L. lamb's-quarters, pigweed. Seeds nearly circular, lens-shaped, with blunt edges, 1-1^ mm. in diameter, occur- ring in commercial seeds as free seeds or as fruits, the seeds proper being invested by the thin pericarp; free seeds jet black, smooth or nearly so, and highly polished; scar occu- pying a curved groove extending from the cen- ter to the edge of one face and usually evident as a light-colored line; fruits only slightly larger than the seeds, mostly gray or black and dull; pericarp wall often broken away, expos- ing theshining black surfaceoftheseed; again, this wall and the seed coat are often broken, exposing the yellowish or whitish embryo and endosperm; embryo cylindrical, occupying the border of the seed and surrounding the endosperm, its extremities almost meet- ing, the tip of the caulicle occupying an extension of the seed coat at the edge beside the scar. (Fig. 26.) Found chiefly in Kentucky bluegrass and Canada bluegrass seeds, but not frequently and never abun- dantly. Plantago lanceolata 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 United States. Bureau of Plan
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