. 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. 130 NYCTAGINACBAS (FOUR-tf CLOCK FAMILY). Fig. 82. — Heart-leaved Um- brella-wort {Oxybaphus nyctar gineus). X J. mature until it becomes nearly an inch broad, thin, and net-veined, acting as a parachute in the distribution of the seeds; each small blossom has a bell- shaped five-lobed, red perianth, with three to five stamens and one style, both exserted. Ovary one-celled, the fruit a small, hard, a
. 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. 130 NYCTAGINACBAS (FOUR-tf CLOCK FAMILY). Fig. 82. — Heart-leaved Um- brella-wort {Oxybaphus nyctar gineus). X J. mature until it becomes nearly an inch broad, thin, and net-veined, acting as a parachute in the distribution of the seeds; each small blossom has a bell- shaped five-lobed, red perianth, with three to five stamens and one style, both exserted. Ovary one-celled, the fruit a small, hard, achene-like, nar- rowly obovoid, ribbed, and hairy nut- let, possessed of long vitality. (Fig. 82.) Means of control Prevent seeding. Cultivation will cleanse infested fields of the perennial roots, but small areas newly con- taminated should be hand-pulled when the ground is soft, or should be grubbed out, or cut close to the ground and the fleshy root-crowns treated with salt in order to prevent too swift a recovery. HAIRY UMBRELLA-WORT Oxybaphus Airs&itts, Sweet {Allibnia hirsfaa, Pursh.) Native. Perennial. Propagates by seeds. Time of bloom: July to August. Seed-time: August to September. Range: Wisconsin to the Plains of the Saskatchewan, southward to Colorado and Texas. Locally in Ohio, New York, and Con- necticut. Habitat: Prairies; dry fields and meadows. Even more resistant than the preceding species to summer's drought and winter's freezing. Stem one to three feet tall, erect, angled, ridged, sparingly branched, clothed with glandular jointed hairs, especially at the nodes, which are somewhat swollen. Leaves also hairy, oblong or narrowly lance-shaped, with prominent mid- vein, entire, sessile, or the lower ones very short-petioled. 'Flowers. 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 Geo
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
