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Chamaesyce dioica - royal sandmat

Scientific Family
Euphorbiaceae
Synonyms
Chamaesyce indivisa, Euphorbia indivisa
Plant type
Forbs and Subshrubs
Origin
Native
Lifecycle
Annual
Height
Trailing to 10 inches
Riparian
Yes

Trailing stems, branching from a central base; leaves opposite, leaves and stems hairy; flower clusters solitary, 2 of the petal-like white appendages in each cluster longer, male flowers per cluster number about 15.

Sprawling annual; flower clusters (cyathia) scattered, solitary, petal-like white appendages conspicuous, 2 appendages longer, 15 male flowers; leaves oblong, toothed, pointed, asymmetrical bases; fruit capsules often hiding underneath foliage, hairy.

Habitat

Low hills and plains. Open floodplain in cobble and sand.

Plant Community
Desert Scrub
Grasslands
Interior Chaparral
Pinyon Juniper Woodlands
Riparian
Low elevation
3000
High elevation
5000

Flower Characteristics

Flower clusters (cyathia) mostly scattered and solitary, 4 glands, 4 conspicuous petal-like, white appendages, usually with 2 of the appendages much longer than the others, about 15 male flowers per cluster. 

Flower color
White
Flower shape
Regular
Tubular
No
First bloom month
August
Last bloom month
October
Flower clusters
Rounded

Leaf and Stem Characteristics

Oblong, base asymmetric, margins toothed, tips pointed, surfaces may be hairy, 3-veined from base, mid-vein can be conspicuous; stipules (leaf-like appendages at leaf base) sometimes divided into 3 to 4 thread-like segments, usually hairy, stemmed.

Leaf type
Simple
Leaf color
Green
Leaf shape
Round or oval
Leaf margin
Toothed
Leaf attachment
Opposite
Leaves clasp
No
Leaf hairs
Leaves & stems
Spines
No

Fruit and Seed Characteristics

Hairy.

Fruit type
Capsule

White seeds with 5 to 6 deep grooves at right angles to the length of the seed.