Syn:  Lactuca muralis (L.) Gaertner

              

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Annuals.  Taprooted.  Stems are usually solitary, glabrous and often glaucous; soft.  The sap is milky white.  Typical height is 2 to 3+ feet.

The overall inflorescence is many-branched, as tall or taller than wide, mostly leafless or with minute bracts along the stem.  Flower heads are many, but relatively few are in flower at a given time.

Flower heads are ligulate, each head with only 5 florets.  Florets are bisexual and fertile.  Corollas are yellow; 5-toothed.  The involucre is narrowly cylindricalInvolucral bracts are glabrous, in two series, the outer series much shorter than the inner series.

Basal leaves may be present at flowering.  Primary stem leaves are alternate, located mostly below the inflorescence, obovate to oblanceolate, deeply lobed.

Cypselae are dark brown to black, compressed, with several ribs on each face and a short, thin beakPappus is of white bristles.  Plants are often in flower and fruit simultaneously.

Plants of woods and shaded roadsides, often in disturbed ground, minimally-managed landscapes around buildings.  Flowers June to September.  Not native..

Similar species:  Lapsana communis and Lactuca serriolaMycelis muralis resembles some of the Lactuca species, and was formerly considered to be a member of that genus.

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