Pacific Island Ecosystems at Risk (PIER)

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Austroeupatorium inulifolium
(Kunth) R. M. King & H. Rob., Asteraceae
No image available for this species


Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Other Latin names:  Austroeupatorium inulaefolium (H.B.K.) R. M. King & H. Rob.; Eupatorium inulifolium Kunth

Common name(s): [more details]

English: austroeupatorium

Habit:  herb

Description:  "Perennial herb to subshrub 1-2.8 m tall; leaf blades to 14 X 4.5 cm, broadly lanceolate, the lower surface pubescent, glandular; capitula 8-15 flowered, corollas ca 4 mm long; campanulate, sparsely glandular, white; achenes ca 2 mm long; pappus 3.5-4 mm long."  (Berry et al., 1997; pp. 208-209)

Genus:  Perennial herbs to shrubs, sometimes vining, to ca 3 m tall.  Stems moderately branched, puberulent to densely pubescent, often striate.  Leaves simple, opposite or becoming alternate toward stem apex, petiolate; blades linear to ovate, chartaceous to  thickly so, usually acuminate at apex, base often decurrent onto petiole, the margins serrulate to serrate, rarely revolute and touching, 3-veinged from well above base, the upper surface glabrous to strigose, sometimes glandular, the lower surface puberulent to densely pubescent, rarely glabrous, usually glandular.  Capitulescence terminal or from the upper nodes, a rounded corymbiform panicle, sometimes held well above the leaves, capitula subsessile to short-pedunculate.  Capituala homogamous, discoid, 8-20-flowered; involucres cylindrical-obconical; phyllaries subimbricate, graduate, 3 (-4)-serrate, persistent or inner ones sometimes deciduous, spreading with age, elliptic to ovate, 3-5-striate, outer ones and apex of next series herbaceous, puberulent and often glandular; receptacles subconvex, glabrous, epaleate.  Florets bisexual.  Corollas narrowly funnelform, shortly 5-lowed, commonly white, glabrous or lobes sometimes glandular, the limb slightly to obviously broadened, the lobes deltoid or shortly triangular.  Anthers included, sometimes tapering at base, filament collars narrowly cylindrical, the apical appendages ovate to deltoid.  Style erect and exserted, the base puberulous, not enlarged, the branches sometimes with sterile appendages often subclavate, the lower half of branch with paired stigmatic lines.  Achenes long-obconical, 5-angled, glandular, glabrous, or sometimes puberulent; carpopodium tall, enlarged, weakly asymmetric; pappus of many scabrid bristles about as long as corollas and much longer than achenes." (Berry et al., 1997; pp. 208-209)

Species:  "Perennial spreading scrambling shrub 1-5 m tall. Stems terete, covered with dense short hairs.  Leaves opposite, spear-shaped, 7-18 cm long, 2.5-8 cm wide, pubescent, pale green beneath, abruptly narrowing to a wedge-shaped petiole 0.5-3 cm long.  Floral heads 2-3 mm diam., 5-6 mm long, arranged in large terminal corymbs; each head comprising 3 or 4 series of involucral bracts enclosing 10-15 creamy white florets with corollas 4-5 mm long; flowers fragrant.  Achenes oblong, angular, to 1.5 mm long, with a whitish pappus 4 mm long."  (Waterhouse & Mitchell, 1998; pp. 21-22).

Habitat/ecology:  Savannas, swamps, forest borders, disturbed areas, 100-2100 m (Berry et al, 1997; pp. 208-209).  "Disturbed forest, plantations and perennial crops, roadsides.  Prefers moist conditions.  Near sea level to 2000 m altitude."  (Waterhouse & Mitchell, 1998; pp. 21-22).

Propagation:  Wind-dispersed seed (Waterhouse & Mitchell, 1998; pp. 21-22).

Native range:  Central and South America (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Philippines
Philippine Islands
Philippine Islands introduced
invasive
Waterhouse, B. M./Mitchell, A. A. (1998) (pp. 21-22)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Colombia
Colombia
Colombia (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Ecuador (Mainland)
Ecuador
Ecuador (Republic of) (continental) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Indonesia
Indonesia
Indonesia (Republic of) introduced
invasive
Waterhouse, B. M./Mitchell, A. A. (1998) (pp. 21-22)
Panama
Panama
Panama (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Perú
Perú
Perú (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Taiwan
Taiwan Island
Taiwan Island introduced
invasive
Hsu, Tsai-Wen/Peng, Ching-I/Wang, Chiu-Mei (2006) (pp. 41-45)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia (Indian Ocean offshore islands)
Cocos (Keeling) Islands
Cocos (Keeling) Islands introduced
Williams, D. G. (1994) (p. 22)

Comments:  "Serious weed in the Philippines.  Forms very dense thickets in plantations (e.g. rubber, tea and rosella) and clearings in secondary forest.  Also a weed of upland rice."  (Waterhouse & Mitchell, 1998; pp. 21-22).

Additional information:
"Austroeupatorium inulifolium (Kunth) King & Robinson (Asteraceae), a newly naturalized plant in Taiwan" provides additional information, drawings of the plant, and photos.
Information from the Global Invasive Species Database.

Additional online information about Austroeupatorium inulifolium is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Austroeupatorium inulifolium as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Austroeupatorium inulifolium may be available from the Germplasm Resources Information Network (GRIN).

References:

Berry, Paul E./Holst, Bruce K./ Yatskievych, Kay. 1997. Flora of the Venezuelan Guayana, vol. 3: Aralaceae-Cactaceae. Missouri Botanical Garden Press, St. Louis. .

Hsu, Tsai-Wen/Peng, Ching-I/Wang, Chiu-Mei. 2006. Austroeupatorium inulifolium (Kunth) King & Robinson (Asteraceae), a newly naturalized plant in Taiwan. Taiwania 51(1): 41-45.

U.S. Dept. Agr., Agr. Res. Serv. 2013. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

Waterhouse, B. M./Mitchell, A. A. 1998. Northern Australia Quarantine Strategy: weeds target list. Second edition. Australian Quarantine & Inspection Service, Miscellaneous Publication No. 6/98. 110 pp.

Williams, D. G. 1994. Vegetation and flora of the Cocos (Keeling) Islands. Atoll Research Bulletin No. 404. Smithsonian Institution, Washington. 29 pp.


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This page was created on 1 JAN 1999 and was last updated on 1 MAR 2013.