BugwoodWiki Article

leafy spurge
Euphorbia esula L.

Overview

Appearance
Euphorbia esula is an erect, perennial, herbaceous plant that grows from 2-3.5 ft. (0.6-1.1 m) tall. The stem is smooth and bluish-green. The plant produces a milky sap if stem is broken or a leaf is removed.
Foliage
Leaves are lance shaped, smooth and 1-4 in. (2.5-10.2 cm) long. They are arranged alternately along the stem, becoming shorter and more ovate towards the top of the stem.
Flowers
Flowering occurs in June, when yellow flowers develop in clusters at the apex of the plant.
Fruit
Fruits are 3 lobed capsules that explode when mature, propelling brown mottled ovoid seeds up to 15 ft. (4.6 m) away.
Ecological Threat
Large infestations of Euphorbia esula give the landscape a yellowish tinge due to the yellow bracts. Leafy spurge invades prairies, pastures, and other open areas. It is a major pest of national parks and nature preserves in the western United States. It can completely overtake large areas of land and displace native vegetation. This plant is native to Europe and was introduced accidentally into North America in the early 1800s as a seed contaminate.

Resources

Selected Images


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leafy spurge
Euphorbia esula
Flower(s)
Steve Dewey
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leafy spurge
Euphorbia esula
Flower(s)
Chris Evans
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leafy spurge
Euphorbia esula
Flower(s)
William M. Ciesla
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leafy spurge
Euphorbia esula
Foliage
William M. Ciesla
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leafy spurge
Euphorbia esula
Foliage
Bruce Ackley
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leafy spurge
Euphorbia esula
Feature(s)
L.L. Berry
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leafy spurge
Euphorbia esula
Plant(s)
Norman E. Rees
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leafy spurge
Euphorbia esula
Infestation
William M. Ciesla
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leafy spurge
Euphorbia esula
Infestation
Steve Dewey
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leafy spurge
Euphorbia esula
Root(s)
Steve Dewey
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leafy spurge
Euphorbia esula
Root(s)
Steve Dewey
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leafy spurge
Euphorbia esula
Seed(s)
Julia Scher
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0025063

leafy spurge
Euphorbia esula
Research
Norman E. Rees
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leafy spurge
Euphorbia esula
Infestation
Utah State University Archive
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leafy spurge
Euphorbia esula
Plant(s)
Steve Dewey
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leafy spurge
Euphorbia esula
Infestation
Steve Dewey
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leafy spurge
Euphorbia esula
Infestation
Leslie J. Mehrhoff
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leafy spurge
Euphorbia esula
Infestation
Todd Pfeiffer

Maps


EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

EDDMapS Distribution

State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Invasive Listing Sources

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Subclass: Rosidae
Order: Euphorbiales
Family: Euphorbiaceae
Genus: Euphorbia

Other System Links

Plants: EUES
Bayer: EPHES
GRIN: 16366
ITIS: 28064
NPDN Pest: PBVAGBE
NPDN Host: 36377

Synonyms and Other Names

Other Common Names:
wolf's milk

Categories

Category: Forbs/Herbs