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Marcus, Joseph A.
Euphorbia cyathophora Murray
Wild Poinsettia, Poinsettia, Fire on the Mountain
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 Symbol: eucy
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.
Plant CharacteristicsDuration: Annual Habit: Herb Leaf Shape: Oblanceolate Leaf Pubescence: Glabrous Leaf Texture:
The upper or bracteal leaves usually red toward the base. Flower:
Flowers 3-5 mm
4.5-5 mm Size Class:
Bloom InformationBloom Color: Yellow , Green
Bloom Time: May , Jun , Jul , Aug , Sep , Oct , Nov
Growing ConditionsWater Use: Medium
Light Requirement: Sun
Soil Moisture: Moist
Soil Description: Sandy, Sandy Loam, Medium Loam, Clay Loam
BenefitUse 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.
Herbarium Specimen(s)NPSOT 0336
Collected May 24, 1987 in Bexar County by Harry Cliffe
Record Last Modified: 2011-08-05
Research By: TWC Staff, TMH