Names
Scientific Name: Euphorbia heterophylla
Synonym: Euphorbia cyathophora
Common Names: Mexican fire plant, desert poinsettia, fire on the mountain, painted euphorbia
Characteristics
Duration: Annual
Growth Habit: Herb
Arizona Native Status: Native
Habitat: Open areas in disturbed, sandy soil; 2,000 to 5,000 feet
Flower Color: White (very tiny)
Flowering Season: Late summer, early fall
Height: 10 to 30 inches
Description: The name of this plant derives from the pink or red color of the leaves growing closest to the cyathia, or false flowers, at the crown of the stalks. The cyathia form yellow-green clusters. Leaves have 2 to 4 lobes. They are narrow, 1 to 3 inches long.
Special Characteristics
The broken leaves of this plant release a white, latex-like substance that is toxic to some people, causing dermatitis and anaphylaxis. Individuals with latex allergies are easily sensitive to its juice.
Classification
Order: Malphighiales
Family: Euphorbiaceae
SOURCES:
The University of Texas at Austin, Ladybird Johnson Wildflower Center
wildflower.org/plants/result.php?id_plant=EUHE4
Kearney, T. H. and R. H. Peebles. 1960. Arizona Flora. Los Angeles: University of California Press.
