Eupatorium album

Eupatorium album L.

Photographer: W. H. Duncan 1978
Taken in Jesup, Georgia in open pinelands with sandy soil.
Photograph courtesy of The University of Georgia Herbarium
Copyright: Department of Botany, University of Georgia Athens. All rights reserved.

Eupatorium album is an herbaceous perennial with erect or ascending, solid stems reaching from 4 to 8 decimeters tall pubescent. It occurs wild from New York to Florida and Arkansas, throughout woodlands, old fields, pine barrens, and savannahs (Radford et al, 1968).

Table of Contents

Authority
Common Names
Higher Taxa
Identification
Geography
Natural History
References

Authority

Carl Linnaeus, 1707 - 1778

Common Names

White Thoroughwort

Higher Taxa

Class: Angiospermae

Subclass: Dicotyledonae

Order: Asterales

Family:Asteraceae

Subfamily: Not Found

Tribe: Eupatorieae

Subtribe: Eupatoriinae

Genus:Eupatorium

Species: album
Scientific Name: Eupatorium album

Holotype: Not Found

Identification

Radford, et al (1968) describes E. album as an "herbaceous perenial with erect or ascending, solid stems. From four to eight decimeters tall pubescent.

Leaves opposite, elliptic to lanceolate, 5 to 12 cm long, 1.5 to 4 cm wide, acute to slightly acuminate, crenate to serrate, base cuneate, two lower, lateral veins promient and parallel with midrib, pubescent and resinous-dotted beneath; longest petioles to 6 mm long, or leaves sessile.

Corymb 0.6 to 2.5 dm broad, the branches pubescent. Involucres cylindric, 6 to 8 mm long, 2 to 3 mm broad, 5 flowered; bracts long acuminate, the apices and margins white. Corollas white. Nutlets 3 to 4 mm, resinous-glandular; pappus whitish, 5 to 6 mm long".

Geography

AREA STATUS REFERENCES

North America Yes Gleason et al (1963)

Eastern North America Yes Gleason et al (1963)

Southeastern United States Widespread Radford et al (1968)

Southeastern Appalation States Widespread Elliot et al (1997)

Coastal Plain Yes Radford, et al (1968)

Piedmont Yes Radford, et al (1968)

Blue Ridge Mountains Widespread Cronquist (1980)

Great Smoky Mountain National Park Yes Cronquist (1980)

Ridge and Valley Yes Jones, et al (1988)

Cumberland Plateau Yes Jones, et al (1988)

Georgia Yes Jones, et al (1988)

Clark County Georgia Yes UGA Herbarium

AREA	STATUS	REFERENCES
North America	Yes	Gleason et al (1963)
Eastern North America	Yes	Gleason et al (1963)
Southeastern United States	Widespread	Radford et al (1968)
Southeastern Appalation States	Widespread	Elliot et al (1997)
Coastal Plain	Yes	Radford, et al (1968)
Piedmont	Yes	Radford, et al (1968)
Blue Ridge Mountains	Widespread	Cronquist (1980)
Great Smoky Mountain National Park	Yes	Cronquist (1980)
Ridge and Valley	Yes	Jones, et al (1988)
Cumberland Plateau	Yes	Jones, et al (1988)
Georgia	Yes	Jones, et al (1988)
Clark County Georgia	Yes	UGA Herbarium

----------U.S. Distribution----------Site Maps----------

Natural History

Eupatorium album grows in poor, sandy soil and prefers dry, open woodlands (Small, 1972). It flowers in late June - September and is classified in climatic zone Z4 (Radford, et al 1968).

References

Cronquist. 1980. Vascular flora of the southeastern United States. The University of North Carolina Press. Chapel Hill,NC.

Elliott,K.J. & Hewitt,D.. 1997 Forest Species Diversity in Upper Elevation Hardwood Forests in the Southern Appalachian Mountains. Castanea, The Journal of the Southern Appalachian Botanical Society. Vol. 62 No.1

Gleason,H.A. Ph.D.,. 1952. Illuatrated Flora of the Northeastern United States And Adjacent Canada. Lancaster Press, Inc.. Lancaster,PA.

Gleason, H. A. Ph.D. & Cronquist, Ph.D..1963. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. D. Van Norstrand Company, Inc. Canada.

Radford, A. E., H. E. Ahles & C. R. Bell.1968. Manual of the Vascular Flora of the Carolinas. University of North Carolina Press. Chapel Hill, NC.

Small, J.K. 1972. Manual of the Southeastern Flora. Hafner Publishing Company. New York, NY.

Webpage by: Thomas J. Crowell
for Ecology 3500
UNIVERSITY OF GEORGIA