Pacific Island Ecosystems at Risk (PIER)

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Brickellia diffusa
(Vahl) A. Gray, Asteraceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

Spanish: culantrillo

Habit:  herb

Description:  "Erect annual to 2 m tall, simple below and with main axis continuing nearly to tip, but more or less diffusely branched upward when well-developed; stem puberulent or woolly-puberulent, especially upward, often also somewhat viscid or glandular; basal leaves none; cauline leaves opposite, lower ones reduced and often soon deciduous, others well-developed, with slender petiole 1-8 cm long and a thin, deltoid-ovate to broadly subcordate blade mostly 2-8 cm long and wide, palmately tri-nerved, evidently crenate, often atomiferous-glandular, and otherwise sparsely hairy (especially along veins) or nearly glabrous; heads numerous to very numerous on slender peduncles mostly (2) 5-15 mm long; heads mostly 8-13-flowered, cylindric, the involucre 6-9 mm high, its slender bracts strongly imbricate in several series, greenish with hyaline margins, commonly with 2 pale principal veins flanking midline, often with thinner vein delimiting each of the hyaline margins; corollas greenish white, very slender, scarcely expanded upward, about 4 mm long; style branches filiform; achenes about 2 mm long, blackish, antrorsely strigose or more loosely hirsute-strigose"  (Wiggins & Porter, 1971; pp. 320-322).

Habitat/ecology:  In its native range, "moist or dry thickets, often a weed in waste ground, 1,600 m. or less"  (Nash & Williams, 1976; p. 12/43).  "A common weed of much of tropical America" (Wiggins & Porter, 1971; pp. 320-322).

Propagation:  Seed

Native range:  Mexico, 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
Ecuador (Galápagos Islands)
Darwin Islands
Darwin Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Fernandina Group
Fernandina Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Isabela Group
Isabela Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Cerro Azul, Isabela Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Darwin, Isabela Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Isabela Group
Volcán Sierra Negra, Isabela Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island native
Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands)
Wolf Island
Wolf Island native
Charles Darwin Research Station (2005)
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)
Costa Rica
Costa Rica
Costa Rica (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)
El Salvador
El Salvador
El Salvador (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Guatemala
Guatemala
Guatemala (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Honduras
Honduras
Honduras (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Nicaragua
Nicaragua
Nicaragua (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)


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This page was created on 5 JUL 2004 and was last updated on 13 MAR 2012.