Ambrosia

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Introduced

Glandular, aromatic, annual or perennial herbs or shrubs. Leaves sessile or petiolate, mostly opposite, often alternate above, lobed to bipinnate. Capitula dimorphic, many, small. Male capitula virtually hemispherical, few-many, drooping, in leafless terminal spikes or racemes; involucral bracts connate, few, 1-seriate; receptacle with scales; florets tubular, 5-lobed; anthers obtuse at base, with a short often inflexed terminal appendage; style short, entire. Female capitula campanulate, few, sessile, solitary or a few clustered together in upper leaf-axils below males; involucral bracts connate, few, 1-seriate, beaked, ribbed or prickly in fruit; floret solitary, lacking a corolla; style with elongate, linear, papillose branches. Cypselas ovoid, smooth, retained inside nut-like involucre; pappus absent.

About 40 species, from North and South America and the Mediterranean region; 4 species naturalised in Australia.

Source: Jeanes, J.A. (1999). Asteraceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-05-09
 
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life Life
kingdom Plantae
phylum Tracheophyta
superorder Asteranae
order Asterales
family Asteraceae
Higher taxa
genus Ambrosia
Subordinate taxa