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Electronic Flora of South Australia
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Electronic Flora of South Australia genus Fact Sheet

Family: Asteraceae
Pluchea

Citation: Cass., Bull. Soc. Philom. 1817:31 (1817).

Derivation: After N. A. Pluche, 1688-1761, a French teaching abbot and author of a popular natural history work.

Synonymy: Eyrea F. Muell., Linnaea 25:403 (1853).

Common name: None

Description:
Perennial herbs, shrubs and undershrubs, glabrous to glandular-pubescent; leaves cauline, alternate, sessile, toothed, flat.

Capitula shortly pedunculate in terminal cymes, heterogamous, discoid; involucres hemispherical to ovoid, ultimately spreading; bracts ovate to narrowly lanceolate, herbaceous with scarious margins, unequally 3-4-seriate; receptacle flat to slightly convex, naked or with minute upgrowths; outer florets female, fertile, multisetlate, filiform; corollas 2- or 3-toothed; style branches filiform, glabrous.

Achenes slightly compressed-fusiform, smooth; pappus of free uniseriate capillary bristles; disk florets fewer, bisexual, sterile, tubular, 4- or 5-merous; anthers tailed at the base with ovate terminal appendages; style entire or 2-lobed at the apex, papillose; achenes abortive; pappus of free capillary bristles.

Distribution:  About 50 species in temperate and tropical regions of the world; about 5 in Australia.

Biology: No text

Key to Species:
1. Leaf bases decurrent to form narrow wings along the branchlets
P. rubelliflora 2.
1. Leaf bases not forming decurrent wings
 
2. Capitula numerous in dense leafless cymes; involucral bracts ovate, closely imbricate
P. tetranthera 3.
2. Capitula 1-4 in loose leafy cymes; involucral bracts narrowly lanceolate, loosely imbricate
P. dentex 1.

Author: Not yet available


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