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Lactuca muralis
Lactuca muralis, the wall lettuce, is a perennial flowering plant in the tribe Cichorieae within the family Asteraceae. It is also referred to as Mycelis muralis.
Its chief characteristic is its open airy clumps of yellow flowers. Each "flower" is actually a composite flower, consisting of 4–5 petal-like flowers (strap or ray flowers), each approximately 5–7 mm (0.20–0.28 in) in length. There are no disc flowers. Lactuca muralis grows about 2–4 feet (0.6–1.2 m) tall with the lower leaves pinnately toothed and clasping.
Lactuca muralis is a native of Europe but has invaded shady roadsides, paths and logged areas of the Pacific Northwest and New England It has become naturalized in parts of Northern Ireland as long ago as 1913. It was first recorded in The Burren, where it is now frequent, in 1939.
Text excerpted from the Wikipedia article Lactuca muralis by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
