(Lam.) Cabrera, Asteraceae |
Present on Pacific Islands? yes
Primarily a threat at high elevations? no
Other Latin names: Gnaphalium stachydifolium Lam.
Habit: herb
Description: "Annuals, 4-15 cm; taprooted. Stems erect, densely and loosely gray-white tomentose-arachnose. Leaves basal and cauline, basal mostly withering before flowering, blades oblanceolate, 1-3 cm x 2-6 mm (usually folded along midveins, bases subclasping, not auriculate; nearly unreduced among proximal heads, none longer than glomerules), faces concolor, tomentose-arachnose. Heads in continuous cylindric arrays 2-3 (-4) cm x 10-12 mm (pressed). Involucres campanulate, 3.5-4 mm, bases sparsely tomentose. Phyllaries in 4-5 series, outer narrowly ovate-triangular, lengths ca. 1/3 inner, apices acute to acute-acuminate, inner oblong, laminae tan to brownish (not purple), apices (brownish) rounded-apiculate. Florets bisexual 2-4; all corollas yellowish. Cypselae not seen" (Flora of North America online).
Habitat/ecology: In the United States (California), "hillsides, riparian woodlands, disturbed sites, sandy soils; 30-500 m; introduced" (Flora of North America online).
Propagation: Seed?
Native range: Argentina, Brazil, Chile, Uruguay (GRIN).
Presence:
Pacific | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
Chile (offshore islands)
Juan Fernández Islands |
Isla Más a Tierra (Robinson Crusoe Island) |
introduced
invasive |
Atkinson, Rachel/Sawyer, John (2011) |
Chile (offshore islands)
Juan Fernández Islands |
Isla Más a Tierra (Robinson Crusoe Island) |
introduced
invasive |
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 554) |
Chile (offshore islands)
Juan Fernández Islands |
Isla Más Afuera (Alejandro Selkirk Island) |
introduced
invasive |
Atkinson, Rachel/Sawyer, John (2011) |
Chile (offshore islands)
Juan Fernández Islands |
Isla Más Afuera (Alejandro Selkirk Island) |
introduced
invasive |
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 554) |
Chile (offshore islands)
Juan Fernández Islands |
Isla Santa Clara |
introduced
invasive |
Atkinson, Rachel/Sawyer, John (2011) |
Chile (offshore islands)
Juan Fernández Islands |
Isla Santa Clara |
introduced
invasive |
Danton, Philippe/Perrier, Christophe/Martinez Reyes, Guido (2006) (p. 554) |
Pacific Rim | |||
Country/Terr./St. & Island group |
Location |
Cited status &
Cited as invasive & Cited as cultivated & Cited as aboriginal introduction? |
Reference &
Comments |
South America (Pacific rim)
South America (Pacific rim) |
Chile (Republic of) |
native
|
U.S. Dept. Agr., Agr. Res. Serv. (2013) |
United States (west coast)
United States (west coast states) |
USA (California) |
introduced
invasive |
Flora of North America Editorial Committee, eds. (2013) |
Control: If you know of control methods for Gamochaeta stachydifolia, please let us know.