Family: Asteraceae
Streptoglossa
Citation:
Steetz, in F. Muell., Trans. Bot. Soc. Edinburgh 7:491 (1863).
Derivation: Greek streptos, twisted; glbssa, tongue; referring to the dried twisted bracts in old fruiting heads.
Synonymy: Pterigeron (DC.) Benth., Fl. Aust. 3:531 (1867). (C. R. Dunlop (1981) J. Adelaide Bot. Gard. 3:167-182).
Common name: None
Description:
Annual and perennial herbs, slightly aromatic, pubescent, with non-glandular hairs; subsessile microscopic glands also present; leaves cauline, alternate, sessile, simple, entire to serrate, flat.
Capitula terminal, subsessile or on leafy peduncles, solitary or few in loose cymose groups, heterogamous, radiate or discoid; involucres campanulate, becoming spreading but never reflexed; bracts narrowly lanceolate to ovate, acuminate, cartilaginous-herbaceous, with scarious margins, imbricate in 3-6 unequal series; receptacle flat, naked, pitted; outer florets female, 2-many-seriate, ligulate to filiform; style base bulbous; style branches filiform; disk florets fewer, bisexual, fertile, tubular; anthers tailed at the base, with obtuse terminal appendages; style branches linear, papillose.
Achenes terete, ribbed, sericeous; pappus 1- or 2-seriate, of barbellate bristles connate at the base.
Distribution:
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8 species, endemic to Australia.
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Biology:
No text
Key to Species:
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1. Female florets with ligules 3-6 mm long, exceeding the involucre |
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S. liatroides 3. |
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1. Female florets filiform or with ligules 1-2 mm long, not or hardly exceeding the involucre |
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2. Involucres 0.7-1.1 cm long, c. 3-seriate |
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S. adscendens 1. |
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2. Involucres 1.5-2.3 cm long, 4-6-seriate |
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S. cylindriceps 2. |
Author:
Not yet available
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