. Bulletin. 1901-13. Agriculture; Agriculture. 34 THE SEEDS OF THE HLUEGR ASSES. in the more expensive kinds of bluegrass seed indicates the probable use of Canada bluegrass seed as an adulterant. These prickles have been found, however, in rough- stalked meadow grass seed in which no trace of Canada hluegrass seed appeared. Owing to the troublesome nature of Canada thistle, care should be taken not to introduce its seeds with those of the bluegrasses. Taraxacum taraxacum (L.) Karst. DANDELION. Seeds (akenes) 3-4 mm. long, including the per- sistent base of the beak, which forms the pointed ap
. Bulletin. 1901-13. Agriculture; Agriculture. 34 THE SEEDS OF THE HLUEGR ASSES. in the more expensive kinds of bluegrass seed indicates the probable use of Canada bluegrass seed as an adulterant. These prickles have been found, however, in rough- stalked meadow grass seed in which no trace of Canada hluegrass seed appeared. Owing to the troublesome nature of Canada thistle, care should be taken not to introduce its seeds with those of the bluegrasses. Taraxacum taraxacum (L.) Karst. DANDELION. Seeds (akenes) 3-4 mm. long, including the per- sistent base of the beak, which forms the pointed apex of the seed, lance-shaped or broadly so, straight or curved, flattened or slightly four- angled with similar faces, barbed in the upper, broader half; teeth directed toward the apex, prominent on the edges and arranged in about five rows on each face, which has two slender grooves with three rows of teeth between them; surface dull; color light brown or dark brown. (Fig. 22.) Occurring occasionally in both American and European seed, these seeds have appeared most frequently in Kentucky bluegrass and rough-stalked meadow grass. Fig. 22.—Seeds of dandelion (Taraxa cum taraxacum): a, side views; b, nat ural size of seeds. Matricaria inodora L. SCENTLESS 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 Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
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