Swaziland's Alien Plants Database

Tithonia diversifolia (Hemsl.) A.Gray
ASTERACEAE
tree marigold, Mexican sunflower, Japanese sunflower
Invasive, Problem species
Origin: Central America
Growth Form: Shrub
Plant Description: Plant: Bushy annual or perennial, woody at the base, 1.5–3.5 m high. Leaves: Dark green, hairy, often pale-velvety below, up to 150 mm long x 120 mm wide, ± ovate, usually deeply three- to five-lobed, petioles winged. Flowers: Bright yellow, to 100 mm across, solitary on long stalks much swollen and velvety below the heads, several together in branched clusters; buds rounded; bracts below petals in about four series, inner with rounded, papery tips, April–June. Fruit: Brown achenes, in a rounded, spiky mass.
Key Features:
Control: manually, with chemical follow-ups, on seedlings that reappear in cleared areas
Comments:
More information:
Weeds & Invasive Plants Home Page

Photo - plants



K Braun, Swaziland's Alien Plants Database

Photo - flowers/buds/leaves



K Braun, Swaziland's Alien Plants Database

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