Plants of South Eastern New South Wales

Erigeron canadensis

Flower heads and leaves. Australian Plant Image Index, photographer Murray Fagg, Ben Boyd National Park near Eden

Plants. Australian Plant Image Index, photographer Murray Fagg, Ben Boyd National Park near Eden

Common name

Canadian fleabane

Family

Asteraceae

Where found

Weed in disturbed sites and along streams. Widespread.

Notes

Introduced annual herb to about 1.5 m high. Stems often reddish, striate, hairy to sparsely hairy with long coarse spreading hairs. Leaves basal and alternating up the stems, with long spreading hairs mainly confined to the margins and lower midrib. Basal leaves 2–10 cm long, 3–15 mm wide, entire or sparsely toothed. Stem leaves entire or finely toothed, 2–8cm long, 2–7mm wide. Flower heads green tinged light brown, bell-shaped to hemispherical, 3–4 mm long, 2.5–4 mm in diameter. Outer florets with 'petals' about 1 mm long, white, (sometimes tinged purplish). Inner florets few. Flowers in an pyramidal branched cluster with numerous flower heads. Flowering: most of year.

Conyza canadensis var. canadensis in PlantNET.

The name Conyza parva, now regarded as a synonym of Erigeron canadensis, is still treated as a separate species in PlantNET.

General Biosecurity Duty all NSW (as Conyza.species)

PlantNET description (as Conyza canadensis var. canadensis):  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Conyza~canadensis (accessed 1 May 2021)

PlantNET description (as Conyza parva):  http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Conyza~parva (accessed 1 May 2021)