. 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. 438. COMPOSITAE {COMPOSITE FAMILY) WHITE-TOP Erlgeron diinuus, L. Tall White-weed, Daisy Fleabane, Sweet Propagates by seeds. Other English names: Scabious. Native. Annual or winter annual. Time of bloom: May to November. Seed-time: June to December. Range: Nova Scotia to Alaska, southward to Georgia and Missouri. Habitat: Fields, meadows, roadsides, waste places. A special pest of grass and clover f
. 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. 438. COMPOSITAE {COMPOSITE FAMILY) WHITE-TOP Erlgeron diinuus, L. Tall White-weed, Daisy Fleabane, Sweet Propagates by seeds. Other English names: Scabious. Native. Annual or winter annual. Time of bloom: May to November. Seed-time: June to December. Range: Nova Scotia to Alaska, southward to Georgia and Missouri. Habitat: Fields, meadows, roadsides, waste places. A special pest of grass and clover fields, the earlier flowers maturing and dropping seeds into the soil before the accompanying crop is ready to harvest, thus assuring a con- tinuity of its unwelcome .presence. Seed- bearing plants are transported in baled hay and the seeds are a common impurity of grass seeds. Stem two to five feet tall, erect, stiff, some- what ridged, sparsely covered with spreading hairs, much branched at the top. Leaves thin, coarsely and sharply toothed, the lower ones long-ovate, tapering into margined peti- oles, the upper ones lance-shaped, acute, toothed only along the sides, sessile or with very short petioles, those on the branches still smaller and usually entire. Heads very numerous, in many corymbose clusters, on short pedicels, about a half-inch broad, the many narrow pays white or faintly tinged with purple; tBracts of the involucre bristly- hairy and nearly linear. Achenes very small, light-colored, flattened, slightly hairy. Pappus .double, the inner row of fine bristly hairs, the outer row of short slender scales. (Fig. 304.). Fig. 304. —White- top (Erigeron an- nuus). X J. Means of control If the infestation is new and the weed not so abundant as to make- the task impracticable, it will pay to hand-pull and remove. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
