Family: Asteraceae
Sigesbeckia orientalis
Citation:
L., Sp. Pl. 900 (1753).
Synonymy: Not Applicable Common name: None
Description:
Erect annual herb to 80 cm high; stems terete, branched, slightly pubescent, brownish; leaves in remote pairs, petiolate, lanceolate to hastate, 3-12 cm long, 1-6 cm wide, flaccid, pubescent, prominently veined; margins irregularly dentate or sinuate-toothed.
Capitula c. 1 cm diam., on peduncles shorter than the leaves; outer involucral bracts irregularly patent, narrowly spathulate, 7-11 mm long, densely covered with dark stalked glands; ray florets c. 8; ligules 1-2 mm long, broadly oblong, 2- or 3-toothed at the apex, yellow; disk florets 10-15, yellow; receptacular scales obovate, obtuse, pubescent.
Achenes 2-3 mm long, slightly angled, black.
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Image source: fig. 649b in Jessop J.P. & Toelken H.R. (Ed.) 1986. Flora of South Australia (4th edn).
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Published illustration:
Henry & Pritchard (1975) Weeds of New Guinea, p. 78.
Distribution:
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Widespread in the Old World tropics and subtropics. Mainly in forests and along creeks, also a weed of waste ground.
All States.
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Conservation status:
native
Flowering time: most of the year.
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SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
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Biology:
No text
Author:
Not yet available
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