Family: Asteraceae
Conyza canadensis
Citation:
Cronq., Bull. Torrey Bot. Club 70:632 (1943) var. canadensis.
Synonymy: Erigeron canadensis L., Sp. Pl. 863 (1753).
Common name: Canadian fleabane.
Description:
Annual herb to 1.5 m high; stem erect, robust, sparsely branched, brownish, striate, hispid; basal leaves petiolate, oblanceolate, 2-5 cm long, 3-8 mm wide, hispid on the margins and mid-vein, shallowly dentate; upper leaves sessile, narrow-elliptic to linear, 2-6 cm long, 2-6 mm wide, hispid on margins, entire or denticulate.
Capitula very numerous in a pyramidal panicle; involucres 3-4 mm long, cylindrical; bracts subglabrous, brownish; outer florets ligulate; ligules linear, c. 1 mm long, white; receptacles 1.5-2 mm diam., deeply pitted.
Achenes oblong, c. 1.5 mm long, pale, pubescent; pappus bristles free, white, c. 4 mm long.
Published illustration:
Ross-Craig (1960) Drawings Brit. Pl. 15:t. 8.
Distribution:
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Weed.
Qld; N.S.W.; Vic. Native to North America.
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Conservation status:
naturalised
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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