Family: Asteraceae
Acroptilon repens
Citation:
DC., Prod. 6:663 (1838) subsp. repens.
Synonymy: Centaurea repens L., Sp. Pl. edn 2:1293 (1763); C. picris Pallas ex Willd., Sp. Pl. 3, 3:2302 (1803).
Common name: Creeping knapweed, Russian knapweed, hard-heads.
Description:
Perennial to 90 cm high; stems numerous, branched, leafy, ribbed, pubescent; basal leaves oblanceolate, narrowed at the base, pinnatifid to pinnatipartite with dentate lobes, to 15 cm long, pubescent, soon withering or absent; cauline leaves oblong to lanceolate, entire or remotely dentate, acute to mucronate, 1-5 cm long, 2-8 mm wide, pubescent.
Capitula shortly pedunculate, erect, 6-9 mm diam.; involucral bracts pale-greenish, pubescent; outer ones orbicular to obovate, with broad entire membranous appendages; inner ones narrowly lanceolate, with acuminate plumose appendages; florets numerous, far exceeding the involucre.
Achenes 3-4 mm long, pale, striate; pappus bristles to 8 mm long.
Published illustration:
Parsons (1973) Noxious weeds of Victoria, fig. 39.
Distribution:
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On roadsides and waste land.
Qld; N.S.W.; Vic. Native to European Russia and south-western Asia.
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Conservation status:
naturalised
Flowering time: Oct. — April.
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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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