Home
Advanced Search Map Locator View Settings
Add Current Plant To List Edit Current Plant
Show all Photos

My Plant Lists Nurseries Planting Guide Contact Calscape About Calscape
Tap map to see plants native to location
Order by Popularity Order by Common Name Order by Botanical Name
Show nursery cultivars Hide nursery cultivars
Show plants not in nurseries Hide plants not in nurseries
Grid view Text view
Loading....
Alkali Weed
Cressa truxillensis
  


About Alkali Weed (Cressa truxillensis) 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

Max. Height
9.8 in (24.9 cm)

Form
Mounding

Growth Rate
Moderate

Flower Color
White

Flowering Season
Spring
Spring
Summer
Fall
Winter


Native Status
Native

Natural Setting
Site Type
Saline and alkaline soils

Sun
Sun

Elevation ?
-228' - 5098'

Annual Precip. ?
2.5" - 31.6"

Summer Precip. ?
0.15" - 1.84"

Coldest Month ?
31.2° F - 60.1° F

Hottest Month ?
59.8° F - 89.2° F

Humidity ?
0.62 vpd - 44.17 vpd

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*

Landscaping Information
Water Requirement ?
Low
Extremely Low
Very Low
Low
Moderate - High


Nursery Availability
Sometimes Available

Other Names
Common Names
Spreading Alkaliweed



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


Sign in to your Calscape Account X




Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address
Password

Sign In