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Cressa truxillensis
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Alkali Weed
( Cressa truxillensis )
Cressa truxillensis
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Alkali Weed (Cressa truxillensis)
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Cressa truxillensis
is a species of flowering plant in the morning glory family known by the common name spreading alkaliweed. It is native to the western United States and Mexico, where it grows in habitat with saline or alkaline soils, such as beaches, desert flats, and playas. This is a perennial herb producing an erect stem with many branches up to about 25 centimeters tall. The clump of stems is densely lined with silky hairs and studded with many small hairy oval leaves, each under a centimeter long. Flowers appear in the axils of the uppermost leaves. Each has a white corolla with five pointed lobes surrounded by hairy green sepals. There are five protruding stamens and two styles.
Plant Description
Plant Type
Perennial herb
Size
9.8 in tall
Form
Mounding
Growth Rate
Moderate
Flower Color
White
Flowering Season
Spring
Landscaping Information
Sun
Full Sun
Moisture
Low
Nurseries
Carried by 1
Soil Description
Prefers loamy or clay soils. Grows poorly in sandy soils.
Sunset Zones
?
7*, 8*, 9*, 10*, 11*, 13, 14*, 15, 16, 17, 18*, 19*, 20*, 21*, 22*, 23*, 24*
Natural Setting
Site Type
Saline and alkaline soils
Climate
Annual Precipitation: 2.5" - 31.6", Summer Precipitation: 0.15" - 1.84", Coldest Month: 31.2" - 60.1", Hottest Month: 59.8" - 89.2", Humidity: 0.62" - 44.17", Elevation: -228" - 5098"
Alternative Names
Common Names
: Spreading Alkaliweed
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Alkali Weed
Cressa truxillensis
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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