Snakeweed


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Snakeweed

 

several species of plants of various families.

The name most often refers to Polygonum bistorta, a herbaceous plant of the family Polygonaceae. The thick, twisted, snakelike rhizome contains tannins, gallic and ellagic acid, catechin, oxymethylanthraquinone, starch, glucose, vitamin C, provitamin A, dyes, and other substances. The liquid extract and the decoction of the rhizome are used as astringents and antiphlogistics internally for intestinal disorders and uterine and gastrointestinal hemorrhages and externally for inflammatory diseases of the mucous membranes.

The name “snake weed” is also given to Virginia snake root (Aristolochia serpentaria), a North American plant of the family Aristolochiaceae. In various localities of the USSR “snakeweed” is used for about ten other species of plants, including ladies’-tobacco (Antennaria dioica)’, species of the genus Gnaphalium, family Compositae; and the lily of the valley (Maianthemum bifolium), family Liliaceae.

References in periodicals archive ?
tenuipennis (which may or may not possess a pronotal stripe), from the very similar nymphs of the snakeweed grasshopper, Hesperotettix viridis, a widespread species found in much of the U.S.A.
gloriosus collected or observed on 2 and 5 October were on or close to blooming Broom snakeweed, a low growing shrub with numerous small, yellow blossoms.
The return of Snakeweed to farm areas need not result in "milk sickness" if we understand this problem and clear fields and build fences.
"If we can determine how to safely increase the use of previously unused woody species, including honey mesquite, creosotebush, and broom snakeweed, we could tap an unused range resource," says Havstad.
Under turquoise skies, the dark junipers, spiky gray-green yucca and lime stalks of snakeweed contrasted sharply with the waters of the Rio Puerco, a shallow red river curling through high red banks.
Since the end of the nineteenth century, desert grasslands in southern Arizona have experienced notable increases in the distribution and density of scrubby trees and shrubs, including mesquite (Prosopis), juniper (Juniperus), burroweed (Isocoma tenuisecta), and snakeweed (Gutierrezia; Bahre, 1995).
So also is the case of the snakeweed grasshopper, Hesperotettix viridis (Scudder), which can reach densities of 30 m-2, but feeds exclusively on poisonous plants (Pfadt 1994).
Remote sensing of broom snakeweed (Gutierrezia sarothrae) and spiny aster (Aster spinosus).
The dominant plants are creosote bush [Larrea tridentata (D.C.) Coville], fluff grass [Tridens pulchellus (H.B.K.) Hitchc.], and snakeweed [Gutierrezia sarothrae (Pursh) Britt.
The surrounding uplands were open steppe of mixed grasslands, interspersed snakeweed (Guiterrezia sarothrae), and sagebrush (Artemesia), with canyonlands of mixed grasses, forbs, skunkbush (Rhus aromatic), and juniper (Juniperus; Hazlett, 2004).
Other common shrubs and subshrubs at the study site in New Mexico included honey mesquite (Prosopis glandulosa), tree cholla (Cylindropuntia imbricata), broom snakeweed (Gutierrezia sarothrae), and soapweed yucca (Yucca glauca).
Influence of avian predation on a grasshopper (Orthoptera: Acrididae) assemblage that feeds on thread-leaf snakeweed. Environmental Entomology 27: 110-116.