Weeds - Goulburn Broken Catchment Management Authority
Weeds - Goulburn Broken Catchment Management Authority
Weeds - Goulburn Broken Catchment Management Authority
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Onopordum acaulon<br />
(Flat Thistle, Horse Nettle)<br />
Regionally Controlled Weed<br />
Thistle - Stemless<br />
Description: A prostrate annual or sometimes biennial, which<br />
reproduces by seed.<br />
flowers: White to purple in 6 cm heads, clustered in the<br />
centre of plants. Each head surrounded by many spiny bracts.<br />
Occurring in Spring.<br />
leaves: Arranged in a large rosette. Silvery and woolly to<br />
40 cm long, on short stalks. Deeply toothed and spiky along<br />
edges.<br />
stems: Absent.<br />
Note: Flat form crowds out large areas of pasture.<br />
similar Native species: Unlikely to be confused with native<br />
species.<br />
j f M A M j j A s O N D<br />
CONtROl OPtIONs VECtOR Of sPREAD<br />
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