Canyon ragweed (A. ambrosioides) is a fairly tropical, big-leafed species of somewhat moist habitats that seems to require some summer rain, while white bursage (A. dumosa) rivals creosote bush as the most arid-adapted perennial in North America where rainfall is mostly in winter, and summers are brutally hot. These are the two most common species in the arid valleys of the Lower Colorado River Valley and therefore the most likely competitors for scarce water resources. There is also a disjunct population in Durango, Mexico. Each subdivision of the Sonoran Desert has at least one common species of bursage that contributes subliminally to the visual character of the landscape. Staminate heads have many flowers and are 3 to 5 mm in diameter with a 5 to 8 lobed involucre. Hollyleaf bursage (A. ilicifolia), a bursage with especially attractive foliage, grows in the wetter microhabitats within the hottest, most arid parts of the Sonoran Desert. 1964. They form a slender taproot or a creeping rhizome. Drainage channels are among the most conspicuous surficial features of deserts, but little quantitative analysis of their influence on plant distributions is available. Observation Search (2480 records) Plant Characteristics. Among the plants sheltered by this bursage is the local pincushion cactus, Mammillaria grahamii. Gray) W. W. Payne, J. Arnold Arbor. Ambrosia dumosa : White bur-sage . Its many slender, stiff branches form a compact, hemispherical crown [ 14 , 41 ]. Some new constituents of Ambrosia species: A. psilostachya and A. acanthicarpa. Bursages are vitally important to the community as nurse plants. English names: white bursage, burro-weed, burrobush Spanish names: chicurilla, hierba del burro (burro herb), huizapol Description. This subshrub to about 2 feet (0.6 m) tall has small, white, deeply-divided leaves. It also occurs in the eastern portion of the Lower Colorado River Valley subdivision and in a few localities in Baja California. Don’t confuse it with the plant more commonly called rabbitbrush, Chrysothamnus nauseosus, which flowers only in the fall and is much less allergenic. Notes: Ambrosia dumosa, a dicot, is a shrub that is native to California and is also found outside of California, but is confined to western North America. Consider using other natives that do well in sunny, sandy sites, such as Nuttall's Scrub Oak (Quercus dumosa), Desertbells (Phacelia campanularia), or the Bristly Matilija Poppy (Romneya trichocalyx). Ambrosia dumosa December–June ... Like many other members of this genus, arrowweed has a unique scent and was used for a variety of medicinal purposes. Along with microscopic hairs, the fruit has 12 to 35 flat and straight spines which are 5 to 9 mm in length and scattered over the surface. At the Desert Museum the dominant small-shrub species is triangleleaf bursage. Native Introduced Native and Introduced. Plant Distribution. Ambrosia dumosa in The Plant List Version 1.1. Send by email Printer-friendly version. It flowers in late winter into spring and occasionally at other times. And here’s hoping you’ll never think of bursages as just drab little allergenic bushes again. This third edition contains additional refinements in the nomenclature, distribution, illustrations, and descriptions of plants. During this time it can still be recognized by the presence of longitudinal stripes on smaller stems.[7]. Preferred name: Ambrosia dumosa ; Authority: (A.Gray) W.W.Payne ; Common names. O’odham used canyon ragweed in sweat baths to relieve arthritic pain. Virtually nothing eats them. They are wind-pollinated, so they need no animal allies for reproduction. Other studies have suggested that A. dumosa roots produce a chemical that causes them to grow away from conspecific roots, preventing competition for water resources. About White Bursage (Ambrosia dumosa) 5 Nurseries Carry This Plant Add to My Plant List; Ambrosia dumosa, the burro-weed or white bursage, is a common constituent of the creosote-bush scrub community throughout the Mojave desert of California, Nevada, and Utah and the Sonoran Desert of Arizona and northwestern Mexico. Triangleleaf bursage lives as long as 50 years. Gray) Payne – burrobush Subordinate Taxa. Missouri Botanical Garden. [3], Its inflorescence is yellow with staminate and pistillate headson a single plant (monoecious). Calflora taxon report, University of California, Lady Bird Johnson Wildflower Center Native Plant Information Network (NPIN), University of Texas, https://en.wikipedia.org/w/index.php?title=Ambrosia_dumosa&oldid=825863406, Articles with unsourced statements from September 2010, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 February 2018, at 21:31. Ambrosia dumosa. Ambrosia chenopodifolia grows on the mild Pacific coast of Baja California under a winter rainfall regime. Gray and Ambrosia dumosa (A. Despite the abundance of bursages and ragweeds, few vertebrates browse them. Biota of North America Program 2014 county distribution map. Related Links. Ambrosia dumosa, the burro-weed or white bursage, a North American species of plants in the sunflower family. Nor do they seem to host many insects; they definitely do not rely on insects for pollination. Perhaps even more interesting is the finding that the roots of different bursage plants seem able to detect one another and respond by growing in different soil volumes. A Large Image of Ambrosia dumosa (burrobush) from the USDA PLANTS database : Name Search: name search type enter a search name. Burro weed, Burrobush, White bursage Ambrosia dumosa, a dicot, is a shrub that is native to California, is also found outside of California, but is confined to western North America. Visualize that saguaro producing its first flowers in the year 2670 and you begin to grasp the time-scale on which desert communities function. In the current study, we investigated some of the geographic and genotypic dimensions of this recognition capability by using root observation chambers to observe the effects of encounters of individual roots on root elongation rates. Learn more. It is a common constituent of the creosote-bush scrub community throughout the Mojave desert of California, Nevada, and Utah and the Sonoran Desert of Arizona and northwestern Mexico (Baja California, Baja California Sur, Sonora, Chihuahua).[3][4][5][6]. They spread hot coals on flat ground and covered them with a layer of ragweed leaves, then laid the afflicted person atop them and covered him or her with a blanket. This species is characteristic of Arizona Upland desert, where it is often the dominant understory plant. Name Language; white bursage: English (US) Propose photo. Ambrosia dumosa is not well-adapted to fire because of its limited ability to sprout. This is a woody shrub to about 6 feet (1.8 m) tall with sparsely-branched, wand-like stems bearing large (to 7 inches, 18 cm long), broad, dark gray-green leaves. But in the case of Ambrosia coronopifolia, the leaves are simple. it … Cutleaf fleabane is a member of the sunflower family (Asteraceae), an immense group containing over 15,000 species worldwide. Published on the internet. English names: triangleleaf bursage, burrobush, rabbitbush Ambrosia dumosa has been studied to determine allelopathic interactions with creosote bush, Larrea tridentata, which produces a chemical that inhibits the growth of A. dumosa[citation needed]. 21 Page 13 Bursage Ambrosia dumosa (A. Tropicos.org 2018. Ambrosia dumosa. Gray) W.W. Payne. See more ideas about xeriscape plants, xeriscape, tucson sunset. [7][3], Ambrosia dumosa becomes dormant during drought, losing all of its leaves to prevent water loss by transpiration; drought deciduous. Sesquiterpene lactones. Ambrosia dumosa. and A. In the parched flats of the Lower Colorado River Valley white bursage and creosote bush are often the only perennial species. This subshrub to about 2 feet (0.6 m) tall has small, white, deeply-divided leaves. What follows is a general description for the genus Ambrosia. Ambrosia dumosa (A. Bursage is the least ambiguous of the English vernacular names; the others are also applied to unrelated plants. dumosa Gaertneria dumosa (A.Gray) Kuntze Homonyms Ambrosia dumosa (A.Gray) Payne Common names Burrobush in language. We studied recovery of 21 perennial plant species along a severely disturbed aqueduct corridor in a Larrea tridentata-Ambrosia dumosa plant alliance in the Mojave Desert 36 years after construction. Xeriscape plants (and a few oasis zone plants). The leaf arrangement is opposite at the base, but becomes alternate higher on the stem. Flora of North America Vol. Plants are leafless in dry periods, which is most of the year in its habitat. 4 Search Results. Ambrosia dumosa primarily re-establishes from seed from off-site sources after fire (Vasek 1979, 1983, McAuliffe 1988, Hunter 1989). There are no related plants for species Ambrosia dumosa. Ragweed pollen is a common allergen.A single plant may produce about a billion grains of pollen per season, and the pollen is transported on the wind. The leaves are 0.5 to 4 cm long and also covered in soft gray-white hairs. 2’ by 4’ Baccharis spp. This and other bursages are called burrobush and rabbitbush in pollen reports. Geissman, Sumu Matsueda. Bursages and ragweeds are mostly inconspicuous shrubs and subshrubs (although some are herbaceous perennials), with tiny to fairly large, usually grayish, leaves. In the northern edge of its range it is restricted to the warmer slopes above valley floors. Previous work has shown that the contact inhibition that occurs among roots of Ambrosia dumosa shrubs has a self/nonself recognition capability. The leaves are lost in very dry periods. Ambrosia dumosa. Click here to review or comment on the identification. Gray) Payne, were collected along a climatic gradient, germinated in a greenhouse and the plants tested for their vulnerability to cavitation by the air-pressure method. T.A. Canyon ragweed is a subtropical shrub common throughout Sonora, southwestern Arizona, and the southern half of Baja California. Today we are proud of our undetectable desert restoration efforts, and commercial nurseries propagate tens of thousands of bursage plants for use in desert revegetation projects. Click below on a thumbnail map or name for species profiles. Shown that the contact inhibition that occurs among roots of Ambrosia coronopifolia, the leaves are simple during time. Great ragweed ( A. artemisiifolia ) and great ragweed ( A. trifida ) about 2 feet ( m. ( US ) Propose photo or name for species Ambrosia dumosa ; Authority: ( A.Gray ) Payne common burrobush. Dumosa Gaertneria dumosa ( A.Gray ) Kuntze Homonyms Ambrosia dumosa name Synonyms Franseria Torr! 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