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Ambrosia monogyra
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Singlewhorl Burrobrush
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Ambrosia monogyra

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About Singlewhorl Burrobrush (Ambrosia monogyra) Hymenoclea monogyra (also, Ambrosia monogyra) is a species of flowering plant in the daisy family known by the common name singlewhorl burrobrush. It is native to the southwestern United States and northern Mexico, where it grows in deserts and adjacent mountains and dry valleys. This is a thickly branching shrub reaching heights from one to four meters. The thin stems are covered in narrow, hairy leaves and flower in large flower clusters of staminate and pistillate flowers. The staminate flowers have translucent white corollas and the pistillate flowers are rounded, fruit-bearing structures. The fruit is an achene with a single whorl of several papery wings.
Plant Description
Plant Type

Max. Height
3.3 - 13.1 ft (1 - 4 m)

Native Status
Natural Setting
Site Type
Washes, dry riverbeds


Elevation ?
-187' - 7042'

Annual Precip. ?
3.0" - 26.7"

Summer Precip. ?
0.18" - 1.58"

Coldest Month ?
33.8° F - 61.4° F

Hottest Month ?
61.9° F - 89.3° F

Humidity ?
1.76 vpd - 42.79 vpd

Landscaping Information
Common uses

Nursery Availability
Never or Almost Never Available

Other Names
Botanical Names
Hymenoclea monogyra

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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