Farm weeds of Canada . h some species are very abundant on farm lands, they demand atten-tion of farmers far more from the frequency with which the seeds are foundamong those of clovers and grasses than as trotiblesome weeds in their colour the seeds are very conspicuous among grass seeds, andon account of their size they are difficult to separate from them. Thisrenders a knowledge of the appearance of the common kinds very import-ant. The seeds of plantains may be roughly separated into two groupsaccording to their shape : in one division, the seeds are irregularly angularlike sma
Farm weeds of Canada . h some species are very abundant on farm lands, they demand atten-tion of farmers far more from the frequency with which the seeds are foundamong those of clovers and grasses than as trotiblesome weeds in their colour the seeds are very conspicuous among grass seeds, andon account of their size they are difficult to separate from them. Thisrenders a knowledge of the appearance of the common kinds very import-ant. The seeds of plantains may be roughly separated into two groupsaccording to their shape : in one division, the seeds are irregularly angularlike small grains of gun powder, , the Common Plantain and the PalePlantain: in the other, they are boat-shaped, hollow on one side and roundedon the other, , the Narrow-leaved Plantain or Eibgrass, and the BractedPlantain. All of these seeds develop a coat of mucilage when thoroughlywetted, by means of which their distribution is much facilitated.* The figure to show the natural size is slightly too large. 74 Plate 38. ^^^^I^S:^^^*- COMMON PLANTAIN < Plan l-ago major, /, ) PLATE 38. COMMON PLANTAIN, Planlago major, L. Other English names: Broad-leaf Plantain, Greater Plantain, Door-yard Plantain, Bird-seed Plantain. Introduced and native. Perennial. Eootstock short and thick, erect,bearing many thick spreading roots and a large tuft of dark green oval,long-petioled, coarsely toothed, spreading or ascending leaves and severallong dense spikes 3 to 12 inches long of inconspicuous flowers with purpleanthers. Seed capsules oval, dividing about the middle. Seeds [Plate 54,fig. 25—natural size and enlarged S times] greenish brown, verj- variable insize and shape, according to the number in the capsule, which varies on differ-ent plants from 8 to 16, rounded on the outer face, angular on the inneror sear side; scar pale and cousjiicuous; the surface of the seed is finely nettedwith broken waved lines of dark brown, which radiate from the scar, averagelength one-twentieth of an i
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1906
