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Chamaesyce prostrata - prostrate sandmat

Scientific Family
Euphorbiaceae
Synonyms
Euphorbia chamaesyce, Euphorbia prostrata
Other common names
blue weed
ground spurge
prostrate spurge
spurge
Plant type
Forbs and Subshrubs
Origin
Native
Lifecycle
Annual or perennial
Height
2 to 3 inches
Riparian
Yes

This herb produces slender prostrate stems up to 7 to 8 inches long, forming a mat up to 16 inches in diameter. It can be found in varied habitat types and in many areas grows as a roadside weed.

Seeds transversely ridged. Fruit hairy only on lobes. Flower glands 4, <0.5 mm, transversely elliptic; petal-like appendage as wide as to wider than gland, entire to scalloped, white.

Habitat

Sandy flats, slopes, and washes in desert transition zones near bases of mountains. Also found in disturbed areas and at a variety of elevations. Can be considered a weed.

Plant Community
Desert Scrub
Disturbed Areas
Grasslands
Interior Chaparral
Pinyon Juniper Woodlands
Riparian
Low elevation
0
High elevation
4600

Flower Characteristics

The flowers are tiny and cup-shaped with white petal-like appendages surrounding the actual flowers. There are 4 male flowers and a single female flower, the latter developing into a lobed, hairy fruit capsule.

Flower color
White to pinkish
Flower shape
Regular
Tubular
No
First bloom month
June
Last bloom month
September
Flower clusters
Rounded

Leaf and Stem Characteristics

The oval-shaped leaves are less than 1/2 inch long with finely toothed edges. Leaves and stems may have some hairs.

Leaf type
Simple
Leaf color
Green to purplish
Leaf shape
Round or oval
Leaf margin
Toothed
Leaf attachment
Opposite
Leaves clasp
No
Leaf hairs
None
Spines
No

Fruit and Seed Characteristics

Tiny capsules of seeds are spheric and lobed, bearing hairs on external angles.

Fruit type
Capsule
Fruit color
Green to pinkish

Tiny seeds are ovoid and white to gray with sharp transverse ridges.