. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. APOCYNACEAE {DOGBANE FAMILY) 313 horizontal rootstocks, from which new plants are sent up at short intervals. All parts of the plant, even the rootstocks, are filled with an acrid, milky juice. (Fig. 218.) Stems somewhat shrubby, one to three feet tall, smooth, very slender, branching at wide angles, reddish on the upper side where exposed to the sunlight, green beneath. Leaves opposite, ovate to obl
. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. APOCYNACEAE {DOGBANE FAMILY) 313 horizontal rootstocks, from which new plants are sent up at short intervals. All parts of the plant, even the rootstocks, are filled with an acrid, milky juice. (Fig. 218.) Stems somewhat shrubby, one to three feet tall, smooth, very slender, branching at wide angles, reddish on the upper side where exposed to the sunlight, green beneath. Leaves opposite, ovate to oblong, entire, smooth and dark green above, somewhat hairy and paler beneath, acutely tipped, rounded or blunt-pointed at base, with short, often reddish petioles. Flowers in terminal and axillary cymose clusters, the corollas nod- ding, bell-shaped, with five re- curving lobes, pale pink, marked with lines of deeper pink, fragrant; stamens five, inserted on the base of the corolla and alternating with five small triangular append- ages below the throat and opposite the lobes. Ovaries two, distinct and free from the calyx forming twin follicles, round, slender, four or more inches long, smooth, curved, stuffed with many thin, flat, brown seeds tipped with tufts of fine white floss, by which the wind is enabled to give them wide Fig. 218. — Spreading Dogbane {A pocynum androswmifolium). X |. Means of control When colonies of the weed appear near house grounds-or barn yards, they should be killed at once by the use of strong, hot brine or caustic soda. In field, pasture, or fence row, the spud or the scythe should be frequently used, beginning with the first bloom and repeating as new shoots appear, dry salt being used for the purpose of checking new growth. Rankly infested ground is most easily cleansed by breaking it up, exposing the rootstocks during hot summer Please note that these images are extracted from scanned page images that may have been digi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
