. 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. 308 ERICACEAE (HEATH FAMILY) of each umbel which is dark purple; rays of the umbel crowded, the inner ones shorter than the outer rows, all subtended by a whorl of green, finely cut, involucral bracts. As the fruits mature the outer rows of pedicels bend inward, making the umbel concave and forming the "bird's ; Carpels thickly set with weak spines along the secondary ribs, forming a s
. 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. 308 ERICACEAE (HEATH FAMILY) of each umbel which is dark purple; rays of the umbel crowded, the inner ones shorter than the outer rows, all subtended by a whorl of green, finely cut, involucral bracts. As the fruits mature the outer rows of pedicels bend inward, making the umbel concave and forming the "bird's ; Carpels thickly set with weak spines along the secondary ribs, forming a small, oblong, gray-brown bur which is light in weight and may be carried far by the wind or drifted with snow; these seeds have long vitality and one seeding may pester the soil for several years. The plant is frequently infested by the leaf-spot fungus, Cercospora apii, which is very injurious to Celery. (Kg. 214.) Means of control Hoe-cutting or spudding the leaf-crowns from the roots during the first season, and closely cutting, or, better, hand-pulling, the flowering stalks of the second year. In grain fields the latter method is the only way to fight the weed effectively, for it is resistant to sprays that would not also destroy the accompanying crop. In cultivated ground the plant gives little trouble, for there it may be uprooted with hoe or cultivator in its first season — a process which at once destroys Fig. 214. —WUd Carrot (Daucus Ca- rota). xi. HARROW-LEAVED LAUREL Kdlmia angustifblia, L. Other English names: Dwarf Laurel, Sheep Laurel, Sheep Poison, Lambkill, Calfkill, Wicky. Native. Perennial. Propagates by seeds. Time of bloom: June to July. Seedr-time: Ripe in September, but often persistent on the shrub until winter. Range: From Newfoundland to Hudson Bay and southward to Georgia. Habitat: Hillsides, pastures, and Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
