. Textbook of botany. Botany. WEEDS AND POISONOUS PLANTS 333 But besides these methods of seed and fruit distribution which are common to many plants, there are a number of others that are peculiar to weeds and must be specially- guarded against. For instance, weed fruits and seeds are often carried into new regions by railway trains; and one often finds newly introduced weeds and other plants growing. Fig. i88. — .\ mixture of seeds commonly found in low-grade alsike clover seed: a, alsike clover; h, white clover; c, red clover; i, yellow trefoil; e, Canada thistle ; /, dock; g, sorrel; A, bu
. Textbook of botany. Botany. WEEDS AND POISONOUS PLANTS 333 But besides these methods of seed and fruit distribution which are common to many plants, there are a number of others that are peculiar to weeds and must be specially- guarded against. For instance, weed fruits and seeds are often carried into new regions by railway trains; and one often finds newly introduced weeds and other plants growing. Fig. i88. — .\ mixture of seeds commonly found in low-grade alsike clover seed: a, alsike clover; h, white clover; c, red clover; i, yellow trefoil; e, Canada thistle ; /, dock; g, sorrel; A, buckthorn ; i, rat-tail plan- tain; ^, lamb's quarters; /, shepherd's purse ; m, mayweed; re, scentless camomile ; o, white campion ; p, night-flowering catch-fly; q, ox-eye daisy; r, small-fruited false flax; s, cinquefoil; i, two kinds of peppergrass; M, catnip; o, timothy; x, chickweed; y, Canada bluegrass; z, clover dodder; i, mouse-ear chickweed; 2, knot-grass; j, tumbling amaranth; 4, rough amaranth ; 5, heal-all; 6, lady's thumb. After Hillman. beside railway tracks, and perhaps spreading gradually from there into neighboring fields. When weeds grow undis- turbed among cultivated plants, their seeds are likely to be harvested with the crop; as a result, the weed seeds are distributed with those of the harvested crop, as chess seed with wheat, wild oats with cultivated oats, and dodder with clover or alfalfa seed; or the seeds, like those of many. 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 Allen, Charles E. (Charles Elmer), b. 1872; Gilbert, Edward Martinius, joint author. Boston, New York [etc. ] D. C. Heath & co
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1917
