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Euphorbia cyathophora (Wild poinsettia)
Page, Lee

Euphorbia cyathophora

Euphorbia cyathophora Murray

Wild Poinsettia, Poinsettia, Fire On The Mountain

Euphorbiaceae (Spurge Family)

Synonym(s): Euphorbia barbellata, Euphorbia graminifolia, Euphorbia havanensis, Euphorbia heterophylla var. barbellata, Euphorbia heterophylla var. cyathophora, Euphorbia heterophylla var. graminifolia, Poinsettia barbellata, Poinsettia cyathophora, Poinsettia cyathophora var. graminifolia, Poinsettia graminifolia, Poinsettia havanensis


USDA Native Status: L48 (N), HI (I), PR (N), VI (N)

The dwarf poinsettia has green stems and alternate lobed leaves, the uppermost with irregular red blotches near the base. The terminal flowers are yellowish with 1-2 small glands or nectaries.

Fire-on-the-mountain is a member of the spurge family (family Euphorbiaceae). Spurges are commonly herbs, with milky sap; in the tropics also includes shrubs or trees. There are about 290 genera and 7,500 species, mostly of warm or hot regions. Among the valuable products of the family are rubber, castor and tung oils, and tapioca. Most members of the family are poisonous, and their milky sap will irritate the membranes of the eyes and mouth.


From the Image Gallery

25 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb
Leaf Shape: Oblanceolate
Leaf Pubescence: Glabrous
Leaf Margin: Lobed
Leaf Texture: Smooth
Fruit Type: Capsule
Size Notes: Up to about 3 feet tall.
Leaf: The upper or bracteal leaves usually red toward the base.
Flower: Flowers 3-5 mm
Fruit: 4.5-5 mm

Bloom Information

Bloom Color: Yellow , Green
Bloom Time: May , Jun , Jul , Aug , Sep , Oct , Nov


USA: AL , AR , AZ , CA , FL , GA , HI , IA , IL , IN , KS , KY , LA , MN , MO , MS , NC , NE , NM , OH , OK , SC , SD , TN , TX , UT , VA , WI

Growing Conditions

Water Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
Soil Description: Sandy, Sandy Loam, Medium Loam, Clay Loam


Use Ornamental: Accent, Garden. A good filler plant but can be invasive.
Conspicuous Flowers: yes
Interesting Foliage: yes

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Fredericksburg Nature Center - Fredericksburg, TX
Lady Bird Johnson Wildflower Center - Austin, TX
Jacob's Well Natural Area - Wimberley, TX

Herbarium Specimen(s)

NPSOT 0336 Collected May 24, 1987 in Bexar County by Harry Cliffe

1 specimen(s) available in the Digital Herbarium

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Euphorbia cyathophora in USDA Plants
FNA: Find Euphorbia cyathophora in the Flora of North America (if available)
Google: Search Google for Euphorbia cyathophora


Record Modified: 2023-02-10
Research By: TWC Staff, TMH

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