Present on Pacific Islands?  yes

Threat only at high elevations?  no

Other Latin names:  Eupatorium solidaginoides Kunth; Ophryosporus solidaginoides (Kunth) Hieron.

Habit:  herb

Description:  "Vegetatively much like [Fleischmannia pratensis], perhaps oftener becoming subshrubby, and with the leaves sometimes cordate at base; inflorescence tending to be longer and more paniculate than in [Fleischmannia pratensis]; involucre 3-5 mm high, evidently puberulent or viscid-puberulent at least toward base, its bracts rather inconspicuously imbricate and inconspicuously striate, all relatively narrow and tapering gradually to the slender tip, the inner often less so than the outer, but still seldom as much as 0.5 mm wide at 0.5 mm from tip, the outer slender and very narrowly acute or acuminate; flowers mostly 9-16 in each head, pale greenish or yellowish green to white or seldom lilac or bluish, the corolla lobes glandular externally; achenes black, generally hispidulous at least on angles, 1.5-2.5 mm long"  (Wiggins & Porter, 1971; pp. 334-335).

Habitat/ecology:  "in thickets, along banks of streams, at edges of forest, and at disturbed sites" (Wiggins & Porter, 1971; pp. 334-335).

Propagation:  Seed

Native range:  Mexico, Central America, and western tropical South America, south at least as far as Bolivia (Wiggins & Porter, 1971; pp. 334-335).

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) Isabela Group	Isabela Island	probably introduced invasive	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Isabela Group	Volcan Alcedo	probably introduced invasive	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Isabela Group	Volcan Cerro Azul	probably introduced invasive	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Isabela Group	Volcan Sierra Negra	probably introduced invasive	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) San Cristóbal Group	San Cristóbal Island	probably introduced invasive	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Santa Cruz Group	Santa Cruz Island	probably introduced invasive	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
Costa Rica Costa Rica	Costa Rica (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
Ecuador (Mainland) Ecuador	Ecuador (Republic of) (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
El Salvador El Salvador	El Salvador (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
Guatemala Guatemala	Guatemala (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
Honduras Honduras	Honduras (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
Nicaragua Nicaragua	Nicaragua (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
Panama Panama	Panama (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)
Perú Perú	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2008)

Comments:  Reported as possibly an invasive plant in the Galápagos Islands per Charles Darwin Research Station.

Additional information:
Additional online information about Koanophyllon solidaginoides is available from the Hawaiian Ecosystems at Risk project (HEAR).

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

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

Other Latin names:  Eupatorium solidaginoides Kunth; Ophryosporus solidaginoides (Kunth) Hieron.

References:

Charles Darwin Research Station. 2005. CDRS Herbarium records.

U.S. Dept. Agr., Agr. Res. Serv. 2008. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

Wiggins, I. L./Porter, D. M. 1971. Flora of the Galapágos Islands. Stanford University Press. 998 pp.