. Farm weeds of Canada . the tipsof the stems and branches, li inches across; the petals notched at the apex,paler toward the center; calyx ovoid, much swollen in fruit, with the ribsvery prominent, and the teeth long and conspicuous. Capsule ovoid, withfive teeth at apex. Seeds [Plate 55, fig. 49—natural size and enlarged 4times] pitchy black, varying from jV to ^ of an inch in diameter, somewhatflattened, rounded triangular; the thin edge notched by the scar of attach-ment. Rough, covered with rows of short teeth. Time of Flowering: July; seed ripe in August. Propagation: By seed. Occurrence
. Farm weeds of Canada . the tipsof the stems and branches, li inches across; the petals notched at the apex,paler toward the center; calyx ovoid, much swollen in fruit, with the ribsvery prominent, and the teeth long and conspicuous. Capsule ovoid, withfive teeth at apex. Seeds [Plate 55, fig. 49—natural size and enlarged 4times] pitchy black, varying from jV to ^ of an inch in diameter, somewhatflattened, rounded triangular; the thin edge notched by the scar of attach-ment. Rough, covered with rows of short teeth. Time of Flowering: July; seed ripe in August. Propagation: By seed. Occurrence: Grain fields. Injury: An impurity in grain. The seed when ground with grain dis-colours the flour and renders it unwholesome, owing to the poisonous prin-ciple sapotoxin, which is found in this plant and some other Cockles. Remedy: Thorough cleaning of seed grain. Hand-p\illing when insmall quantity. In districts where fall wheat is sown extensively, springgrains should be substituted for some time. 36 < Plate 14. PURPLE- COCKLE- (Lychnis G «//,) Plate 15
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1906
