Sonoran Desert Euphorbia

Rattlesnake Weed

Chamaesyce albomarginata

Yuma Sandmat

Chamaesyce setiloba

Grows prostrate on ground. Copious white sap from broken stems. Involucre has petaloid appendages and surrounds a group of minute flowers. Seed capsule, like other euphorbs, is three parted.    Detailed Description

Growing mostly in deep sandy soil. Appendages of minute involucres with narrow, pointed lobes. Copious white sap from broken stems.    Detailed Description

Small-seed Sandmat

Chamaesyce polycarpa

Hyssop Spurge

Chamaesyce hyssopifolia

A common weed of sidewalks and xeriscape gardens in the Sonoran Desert. Grows prostrate on ground. Copious white sap from broken stems. Involucre and flowers are very small as are the seed capsules.     Detailed Description

This species grows mostly upright and is a fairly common urban weed in the Sonoran Desert such as in Phoenix or Tucson. Copious white sap from broken stems.   Detailed Description

Spotted Sandmat

Chamaesyce maculata

Small annual of summer and fall with relatively large petal-like appendages. Grows upright and has linear leaves baring minute teeth.   Detailed Description

Chiricahua Sandmat

Chamaesyce florida

Sonoran Sandmat

Chamaesyce micromera

Small annual of summer and fall with relatively large petal-like appendages. Grows upright and has linear leaves baring minute teeth.   Detailed Description

Warm season herb growing most flant along ground. Glands red or pink without petaloid appendages. Common in the Sonoran Desert, especially sandy areas.   Detailed Description