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any species of the genus Xanthium, widely distributed, coarse annual plants of the family Asteraceae (asteraster
[Gr.,=star], common name for the Asteraceae (Compositae), the aster family, in North America, name for plants of the genus Aster, sometimes called wild asters, and for a related plant more correctly called China aster (Callistephus chinensis
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 family). They are often persistent weeds; the two-seeded oval burrs are particularly troublesome to sheep growers and the very young plants are poisonous to livestock. Cockleburs are often confused with burdock. Cockleburs are classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Asterales, family Asteraceae.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



plant of the genus Xanthium; annual grasses of the Compositae family. The flowers are tubular and unisexual and are formed in unisexual calathide heads. The staminal calathides are multiflorous, round, and apical; the pistil calathides each have two blossoms; both develop on a single plant. Estimates of the number of species range from just a few to 25, and they are found all over the world. There are seven species in the USSR. The most widely found is burweed (X. strumarium), which grows as a weed on vacant land, on cultivated land, and in gardens, along roads, and near houses. Thorny cocklebur (X. spinosum), which has long two- or three-segment spikes at the base of its leaves, is found in the southern regions of the USSR (in refuse areas, along roads, and in pastures).


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
We analyzed the case retrospectively and conjectured that retrieving the left lung cocklebur fruit first may have been safer and more effective than attempting to retrieve the one on the right.
As can be seen (figure 4), the greatest height is related to the non-treated plants (noherbicide treatment), which shows about 24 centimeters and the lowest belongs to the 16 and 19 gr treatments in which the cocklebur's height is about 13.5 centimeters; although there is no significant difference between these two treatments.
Weeds per row % crop yield Weed Crop or area reduction Giant foxtail Soybeans 1 weed/ft 13 Velvetleaf Soybeans 1 weed/3 ft 34 Smooth pigweed Soybeans 1 weed/ft 25-27 Sicklepod Soybeans 1 weed/ft 30 Palmer amaranth Soybeans 1 weed/ft 64 Common cocklebur Soybeans 1 weed/ft 87 Giant foxtail Corn 1 weed/ft 7 Hemp dogbane Corn 1 weed/ft 15 Hemp dogbane Sorghum 1 weed/ft 30 Sicklepod Cotton 1 weed/3 ft 40 Common cocklebur Cotton 1 weed/3 ft 40-60 Wild oat Sugar beet 1 weed/ft 22 Wild oat Wheat 1 weed/[ft.sup.2] 11 Table 14-2 Prohibited, restricted, and secondary noxious weed lists for Minnesota.
For example, it is possible to take a short-day plant such as cocklebur (Xanthium) and place it under long-day conditions so that the plant remains entirely vegetative.
From the origins of Velcro in the notorious spiny cocklebur to how self-cleaning leaves fostered self-cleaning surface inventions, THE GECKO'S FOOT draws direct links between bioresearch and consumer interests.
Readers may be surprised to learn, for instance, that the fruits of the cocklebur inspired the hook and loop fastener known as Velcro; unfolding leaves and insect wings share the same folding patterns as solar panels; and the self-cleaning leaves of the sacred lotus plant have spawned a new industry of self-cleaning surfaces.
You'll Need * 5 different types of seeds (such as basswood, cocklebur, apple, maple, or a type of bean) * 5 different test materials: A wool sock, Styrofoam, felt, a cotton handkerchief, and cardboard Procedure: []1.
Important weeds that pose a threat to horticultural crops include dandelion, Canadian thistle, field bindweed, common lamb's-quarter, Johnsongrass, quackgrass, common cocklebur, and large crabgrass.
Moreover, the voice creates an illusion of earthiness by incorporating colloquialisms and poor grammar into its monologue when Roger flies in the first race, declaring that if "we were all back on the farm now I would say somebody has put a cocklebur under Roger's--well, you know where: maybe it was Mrs Shumann did it ...
Consider the inventor of Velcro, a Swiss engineer by the name of George de Mestral, who, upon placing a cocklebur under a microscope, began an eight-year obsession to emulate the burr-clasping system.
LEAF DYNAMICS Peak, Mott, and their collaborators compared the movements of patches of synchronized pores in cocklebur leaves to those of patches of black and white cells in the automata that Mitchell's team studied.