ragweed

(redirected from Bursage)
Also found in: Dictionary, Thesaurus, Medical.

ragweed,

any plant of the genus Ambrosia, coarse, weedy herbs belonging to 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
..... Click the link for more information.
 family), most of which are native to America. They have inconspicuous greenish flowers and soft subdivided leaves. Ragweeds are regarded as especially troublesome because their pollen is acknowledged as the primary cause of hay fever—especially the pollen of A. artemisiifolia (common ragweed) and A. trifida (great ragweed), the two most prevalent species in North America. The leaves of the common ragweed were formerly used as an astringent and hemostatic; they sometimes impart a bitter taste to milk if eaten by cattle. One variety (elatior) of this species has become widely naturalized in Europe. Ragweeds 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).
..... Click the link for more information.
, class Magnoliopsida, order Asterales, family Asteraceae.
Enlarge picture
ragweed

ragweed

Common allergen. Goldenrod is often blamed because it blooms right next to ragweed, but goldenrod is actually the antidote! Ragweed is all green, sometimes greyish-silver-green. Has distinct finger-like leaves with erect seed-pod spikes. Although many are allergic to ragweed, it is used by others for conditions like nausea, intestinal cramps, menstrual cramps and stroke. (tea from leaves and root) Highly astringent (stops bleeding). Seeds could be used as porridge or cereal.
References in periodicals archive ?
Lepus alleni is poorly represented in areas dominated by creosote, saltbush, and other low-growing shrubs (<2 m) including triangle-leaf bursage.
The objective of this study was to quantify leafing, flowering, and fruiting phenologies of all seven Mojave Desert species--Shockley's goldenhead (Acamptopappus shockleyi), white bursage (Ambrosia dumosa), shadscale (Atriplex confertifolia), Nevada ephedra (Ephedra nevadensis), winterfat (Krascheninnikovia lanata), range ratany (Krameria erecta), and creosote bush (Larrea tri-dentata), occurring in the nest area compared to the adjacent non-nest area in Las Vegas Valley.
Type morroensis has been found in sand verbena-beach bursage, coyote brush, coast live oak woodland, nodding needle-grass, European beachgrass, California annual grassland, iceplant, and dune lupine-goldenbush series communities at 4-162 m elevations on soils of clay and active dune sand.
Vegetation is typical of the Mojave Desert and is dominated by creosotebush (Larrea tridentata) and white bursage (Ambrosia dumosa).
Coleogyne ramosissima shrubs are a common vegetation type in mid-elevations of the Mojave Desert, with creosote bush-white bursage (Larrea tridentata-Ambrosia dumosa) shrublands occurring on valley floors and lower desert mountain slopes and with pinyon pine-Utah juniper (Pinus monophylla-Juniperus osteosperma) woodlands occurring at higher mountain slopes (Lei 1995).
floridum), saguaro (Carnegiea gigantea), prickly pear (Opuntia), pincushion (Mammillaria), creosotebush (Larrea tridentata), triangle-leaf bursage (Ambrosia deltoidea), and jojoba (Simmondsia chinensis).