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PRICKLY LETTUCE Lactuca serriola (Asteraceae) Height to 1.75m. Upright and stiff biennial, the upper part of which is branched. Broken stems exude a milky sap. Grows on disturbed and waste ground, verges and railways. FLOWERS are borne in heads, 11-13mm across, with yellow florets; carried in open, branched inflorescences (Jul-Sep). FRUITS are brown with unbranched pappus hairs. LEAVES are grey-green and held stiffly erect with pointed clasping bases; margins and lower midrib have weak spine; lower leaves may have narrow lobes. STATUS-Common only in S.
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131851
PRICKLY LETTUCE Lactuca serriola (Asteraceae) Height to 1.75m. Upright and stiff biennial, the upper part of which is branched. Broken stems exude a milky sap. Grows on disturbed and waste ground, verges and railways. FLOWERS are borne in heads, 11-13mm across, with yellow florets; carried in open, branched inflorescences (Jul-Sep). FRUITS are brown with unbranched pappus hairs. LEAVES are grey-green and held stiffly erect with pointed clasping bases; margins and lower midrib have weak spine; lower leaves may have narrow lobes. STATUS-Common only in S.

Filename: 131851.jpg
Size: 2353x3543 / 4.2MB
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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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