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Marcus, Joseph A.
Euphorbia cyathophora Murr.
Wild Poinsettia, Poinsettia, Fire on the Mountain
Synonyms: Euphorbia barbellata, Euphorbia graminifolia, Euphorbia havanensis, Euphorbia heterophylla var. barbellata, Euphorbia heterophylla var. cyathophora, Euphorbia heterophylla
USDA Symbol: eucy
USDA Native Status: Native to U.S.
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
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 USDA Native Status: L48(N), HI(I), PR(N), VI(N)
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
Herbarium Specimen(s)NPSOT 0336
Collected May 24, 1987 in Bexar County by Harry Cliffe
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Record Modified: 2011-08-05
Research By: TWC Staff, TMH