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Genus Sigesbeckia Family Asteraceae

Description: Annual or perennial glandular-pilose herbs; stems erect.

Leaves opposite, simple, margins toothed, sessile or with winged petiole.

Heads small, in terminal cymes; heads broad-campanulate or hemispherical; involucral bracts 2-seriate, herbaceous, outer bracts 5, spreading or reflexed, inner bracts c. 8, each enclosing a ray floret, membranous; receptacle convex to short-conic, with narrow membranous somewhat persistent scales. Ray florets in one row, female, fertile, inconspicuous. Disc florets bisexual, fertile, tubular, 5-toothed. Anthers entire at the base, terminal appendages acute. Style branches short, flattened, acuminate or subobtuse.

Achenes compressed obovoid-oblong, often incurved; pappus absent.


Distribution and occurrence: World: c. 95 species, tropical & temperate regions. Australia: 2 species (1 species endemic, 1 species naturalized), all mainland States.

Text by L. Murray
Taxon concept:

 Key to the species 
1Outer involucral bracts linear to oblanceolate, not exceeding florets and achenes, hairy but hairs not glandularSigesbeckia australiensis
Outer involucral bracts narrow-spathulate, usually far exceeding the florets and achenes, with dense glandular hairsSigesbeckia orientalis

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