Common name: Creeping Thistle
Scientific name: Cirsium arvense 絲路薊, 田薊, 加拿大薊
Genus: Cirsium 薊屬
Family: Asteraceae or Compositae 菊科, aster , daisy, composite or sunflower family
Origin: native
Date: 26th July
An erect, branched, rhizomatous perennial, can reach up to 120 cm.
Stem is not winged.
Flower buds.
Date: 26th July
An erect, branched, rhizomatous perennial, can reach up to 120 cm.
Stem is not winged.
Leaf lobes with strong spines; leaf upper surface glabrous (not bristly, surface often shining).
Flowering heads are solitary or in clusters of 2-4.
Flower buds.
Flowering head 1.5 - 2.5 cm, short-stalked.
Florets dull purple; upper part of corolla is divided almost to base into 5 segments.
Brown anthers? filaments? could be seen at the base of the anther tube in the above floret.
Styles are emerging from the white anther tubes.