Weeds of the North Central StatesDIANE Publishing, 1999 - 303 páginas All the weeds commonly found in the North Central Region, as well as a good many that are less common, are illustrated and described in this book. Detailed pictures have been given for most of the weeds, and wherever possible in the descriptions common terms have been substituted for technical ones. People with a minimum of botanical knowledge should therefore be able to identify almost every weed they are likely to find. A weed is defined as a plant not intentionally sown, whose undesirable qualities outweigh its good points. Includes: weed descriptions; keys for identifying weeds; glossary; index to species; and index to families. B&W drawings. |
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Términos y frases comunes
1-seeded achenes axils basal base Biennial borne bracts branched bristles calyx Cotyledons creeping crops cultivated fields dense diameter egg-shaped entire plant especially feet 30 fence rows fibrous flattened fleshy flower clusters Flower heads Flowers small Found in cultivated Found in pastures FOXTAIL fruit green greenish hairs hairy heart-shaped hull inch 2.5 cm inch 3 mm inches 15 inflorescence lanceolate leaflets leafy Leaves alternate Leaves opposite ligule lobed lower leaves margins mature meadows milky milky juice narrow nodes numerous oblong oval ovate palmately panicle Perennial petals petioles plant in flower Plants annual Plants perennial portion of plant portion of stem prickly prostrate purple racemes ray flowers reproducing by seed rhizomes roadsides Root system rootstocks rosette rough rounded Seed pods segments sepals short slender soil spikelets spikes spiny stalks Stems erect Stems smooth stolons surface tall taproot toothed upper leaves upper portion usually waste places weed winter annual
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Página 2 - Illinois Indiana Iowa Kansas Kentucky Michigan Minnesota Missouri Nebraska North Dakota Ohio Oklahoma South Dakota Tennessee...
Página 243 - University: journal paper no. J- 17265 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa: project no.
Página 8 - Manual of Vascular Plants of Northeastern United States and Adjacent Canada by Henry A.
Página 2 - It is part of a co-operative effort involving many of the State Agricultural Experiment Stations and the US Department of Agriculture with support from the US Atomic Energy Commission.
Página 293 - PEDICEL The stalk of an individual flower. PEDUNCLE The stalk of an inflorescence.
Página 6 - The seeds of many weeds remain dormant in the soil for years and then germinate when conditions are favorable. Some weeds have extensive root systems and underground stems that help the weed to spread and persist. Perennial weeds store reserve foods in their root systems and continue to sprout again and again after the tops are destroyed. These characteristics of weeds make control a problem.
Página 74 - Godr. & Gren. Introduced from Europe; sparingly distributed in Ontario. Biennial or short-lived perennial. Rootstock thick, sending up a few short barren shoots and long branching flowering stems, 1 to 2$ feet high. Whole plant rather viscous hairy but not so much so as Night-flowering Catchfly. It resembles the latter somewhat, but is wider branching, has many stems, the leaves are larger, the flowers more numerous, pure white, and with a more conspicuous crown of short white scales around...
Página 2 - Wisconsin, and by the US Department of Agriculture, Science and Education Administration — Agricultural Research and Cooperative Research.
Página 183 - Seeds 14 to 1/2 inch (0.6 to 1.3 cm) long, with a woody hull bearing blunt ridges that end in several short, thick spines at the tip.
Página 291 - Cordate. Heart-shaped; usually used to describe leaves with a pair of rounded basal lobes. Corolla. The petals; the usually colored flower parts immediately inside the calyx.