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Ambrosia acanthicarpa
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Annual Bursage
( Ambrosia acanthicarpa )
Ambrosia acanthicarpa
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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2 Nurseries Carry This Plant
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About Annual Bursage (Ambrosia acanthicarpa)
2 Nurseries Carry This Plant
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Ambrosia acanthicarpa
is a species of ragweed known by the common names flatspine burr ragweed, annual burrweed, and annual bur-sage. This spiny, weedy plant grows in clumps of many erect stems which may reach over a meter in height. Its gray-green stems are covered in a coat of stiff, bristly hairs. The few rough leaves are several centimeters long. The racemes of flowers are more plentiful, with each hairy flower head a few millimeters wide. The spiny, burr-like pistillate heads have pointed, twisting leafs and the staminate heads are rounded. This ragweed is native to western North America. It is adaptable and grows well in disturbed areas, easily becoming weedy.
Plant Description
Plant Type
Annual herb
Size
3.3 - 5 ft tall
Flower Color
Cream
Flowering Season
Summer, Fall
Wildlife Supported
Butterflies & moths hosted ( 1
confirmed
, 22
likely
* )
SHOW ALL
Ambrosia Plume Moth
Adaina ambrosiae
Adaina ambrosiae
*
Hoary Comma
Polygonia gracilis
Polygonia gracilis
*
Common Sootywing
Pholisora catullus
Pholisora catullus
*
Bordered Patch
Chlosyne lacinia
Chlosyne lacinia
*
White-lined Sphinx
Hyles lineata
Hyles lineata
*
Western Tussock Moth
Orgyia vetusta
Orgyia vetusta
*
Armyworm Moth
Mythimna unipuncta
Mythimna unipuncta
Landscaping Information
Sun
Full Sun, Part Shade
Moisture
Very Low
Nurseries
Carried by 2
Ease of Care
Moderately Easy
Soil Drainage
Fast
Natural Setting
Site Type
Sandy plains
Climate
Annual Precipitation: 3.0" - 51.7", Summer Precipitation: 0.12" - 2.58", Coldest Month: 25.8" - 59.2", Hottest Month: 53.6" - 88.8", Humidity: 0.65" - 39.49", Elevation: -15" - 8086"
Alternative Names
Common Names
: Annual Bur-sage, Annual Burrweed, Bursage Ragweed, Flat-spine Burr-ragweed, Flatspine Bur Ragweed, Flatspine Burr Ragweed, Sand Bursage
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Annual Bursage
Ambrosia acanthicarpa
Sources include:
Wikipedia
. All text shown in the "About" section of these pages is available under the
Creative Commons Attribution-ShareAlike License
. Plant observation data provided by the participants of the
California Consortia of Herbaria
, Sunset information provided by
Jepson Flora Project
. Propogation from seed information provided by the
Santa Barbara Botanical Garden
from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include
CalPhotos
,
Wikimedia Commons
, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include
Calflora
,
CNPS Manual of Vegetation Online
,
Jepson Flora Project
,
Las Pilitas
,
Theodore Payne
,
Tree of Life
,
The Xerces Society
, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from
PRISM Climate Group, Oregon State University
, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.
Links:
Jepson eFlora Taxon Page
CalPhotos
Wikipedia
Calflora
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