File:Farm weeds of Canada (1906) (14776213155).jpg

Identifier: farmweedsofcana00clar (find matches)
Title: Farm weeds of Canada
Year: 1906 (1900s)
Authors: Clark, George Harold, 1872- Fletcher, James, 1852-1908 Criddle, Norman Canada. Dept. of Agriculture
Subjects: Weeds Weeds Botany
Publisher: Ottawa : Published by direction of the Minister of Agriculture
Contributing Library: ASC - York University Libraries
Digitizing Sponsor: Ontario Council of University Libraries and Member Libraries

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e Mustard family is the Caper family (Cappari-dacece), which has some important characters in common with it, such ascross-shaped flowers, seeds in pods, but these without partitions, and oftenhaving acrid or pungent juice. The chief differences between the two familiesare that in the Mustard family, four of the six stamens are long and twoshort, while in the Caper family all six are equal, and the pod of the formeris two-celled, being divided by a thin partition across the middle. Thecurious seeds (Plate 55, fig. 47—natural size and enlarged 4 times) of theEntire-leaved SnnER-FLOWER, CJeome integrifolin, T. & G., of this familyare sometimes found in western wheat. These seeds are roiinded-wedge-shapeor elongated-kidnoy-shape, with a deep curved groove running up each facetwo-thirds of the way to the top from just above the sharp-pointed base.These seeds, when ripe, are dark brown, roughened with pale, scurfy ex-crescences; the dried tinripe seeds are yellowish. 2a w. 18 Plate I
Text Appearing After Image:
WORM-Se&D MUSTARD(Erysimum cheiranfhoides./..) PLATE 1.WORMSEED MUSTARD, Erysimum chehanlhoides, L.Other English name: Treacle Mustard. (Noxious: N.W.) Native. Annual and winter annual. Stems erect, simple or branch-ing, six inches to two feet high. Dark green; whole plant sometimes slightlyhoary with very short star-like hairs. Leaves, lance-shaped, sparselytoothed. Flowers bright yellow, one-fifth inch across, in terminal clustersabout one inch across, on gradually elongating racemes. Seed pods slightlycurved from half an inch to one inch long, obtusely four-angled, erect onspreading pedicels. Each pod contains about twenty-five seeds. An aver-age plant will ripen about 25,000 seeds. Seeds (Plate 53, fig. 1—twice nat. sizeand enlarged 8 times), variable in size and shape, many being pointed at oneend, rounded at the other, about J^ of an inch long, reddish yellow, witha dull surface, but almost destitute of mucilage. Scar end darkened.Uadicle conspicuous and incumbent, that is

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