Lag., Asteraceae |
|
Present on Pacific Islands? yes
Primarily a threat at high elevations? yes
Common name(s): [more details]
Spanish: chamiza blanca, manzanilla cimarrona |
Habit: shrub
Description:
Genus: "Cabezuelas heterógama, radiada. Flores perifericas liguladas, fértiles, ♀; las del disco ☿, fértiles. Invólucro biseriado. Receptáculo plano, desnudo o alveolado. Lígulas mas largas que el disco. Tubo de las corolas del disco papiloso, ± profundamente 5-partido. Anteras aladas y coramente aflechadas. Estilo con las brazos lineares. Aquenios prismáticos, angostados hácia la base. Vilano de 4-10 escamitas membranosas, desprovistas de nervios. Arbustitos o yerbas perennes, peludos, con las hojas partidas. Cabezuelas corimbosas"
Species: "Arbusto muy ramoso, ± cortamente gladuloso-pubescente. Hojas numerosas, opuestas, pecioladas, tripartido-bipinadas con los segmentos de ancho variable, de 2-3 cm de largo. Las ramas concluyen en corimbos de cabezuelas largamente pedunculadas. Invólucro de ca. 9 hojuelas cuneado-oblongas, obtusas o un tanto agudas. Lígulas 5-9, del doble largo del disco, de color blanco lijeramente amarillento. Diámetro del disco amarillo de 8-10 mm. Aquenios cilindrico-prismáticos, cuneado-oblongos, ± hirsutos sobre las aristas. Vilano de 8-10 escamitas cuneadas, obtusas, irregularmente recortadas, de tamaño desigual. Tallos 0.6-0.8 m" (Reich, 1896; vol. 4, pp. 116-117).
Habitat/ecology: "In Chile this species grows in the following environmental conditions: Low altitude, interior valleys; coastal mountains, 500-2000 m; coastal areas, 0-500 m. Somewhat dry areas where the drought may last 3-5 months, precipitations of 400-800 mm. are concentrated in winter; dry, arid areas, with long drought periods of 6-10 months, precipitations of 100 mm-300 mm. are concentrated in winter. Fully exposed to the sun, level areas or slopes facing north; some shadow, some protection against direct sunlight, some shadow from vegetation, filtering about 20-40% of light (Chileflora).
Propagation: Seed
Native range: Chile (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 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. 551) |
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)
Antofagasta, Atacama, Coquimbo, Santiago, Valparaiso |
Control: If you know of control methods for Bahia ambrosioides, please let us know.