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COTTON THISTLE Onopordum acanthium (Asteraceae) Height to 2.5m. Tall biennial with strongly winged stems armed with spines and coated in cottony down. Grows on waste and disturbed ground, and on verges. FLOWERS are borne in heads, 30-35mm across, with reddish purple florets and a globular base covered in spine-tipped bracts; in clusters (Jul-Sep). FRUITS have unbranched pappus hairs. LEAVES are oblong with wavy, spiny lobes; cottony on both surfaces. STATUS-Possibly introduced; now widespread and local in S and E England but scarce or absent elsewhere.
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131475
COTTON THISTLE Onopordum acanthium (Asteraceae) Height to 2.5m. Tall biennial with strongly winged stems armed with spines and coated in cottony down. Grows on waste and disturbed ground, and on verges. FLOWERS are borne in heads, 30-35mm across, with reddish purple florets and a globular base covered in spine-tipped bracts; in clusters (Jul-Sep). FRUITS have unbranched pappus hairs. LEAVES are oblong with wavy, spiny lobes; cottony on both surfaces. STATUS-Possibly introduced; now widespread and local in S and E England but scarce or absent elsewhere.

Filename: 131475.jpg
Size: 2440x3543 / 5.1MB
Source:
Date: 1 Jul 2013
Location:
Credit: PAUL STERRY/NPL
Copyright:
Model Release: No
Property Release: No
Restrictions: Nature Photographers Ltd., West Wit, New Road, Little London, Tadley, Hampshire, RG26 5EU. Tel: +44(0)1256 850661 web: www.naturephotographers.co.uk
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