Mycelis muralis Dumort.
Family: Asteraceae
[Lactuca muralis (L.) E.Mey.]
Mycelis muralis image

Leaf blades 35-120(-180+) × 10-50(-80+) mm. Peduncles filiform, 5-25+ mm. Involucres 7-11+ mm. Phyllaries: abaxial faces glabrous. Cypselae: bodies 2.5-3 mm, beaks 0.5-1 mm; pappi: outer 0.1-0.2 mm, inner 5-6 mm. 2n = 18.

Flowering Jun-Oct. Disturbed sites, openings in mixed forests, calcareous or sandy soils; 10-400 m; introduced; B.C., Ont., Que.; Maine, Mass., Mich., Minn., N.H., N.Y., Oreg., Vt., Wash.; Europe.

Slender, glabrous annual or biennial 3-10 dm, the lower surfaces of the lvs and often also the stem ±glaucous; basal and lower cauline lvs 6-18 נ3-8 cm, pinnatifid, with a broad, somewhat ivy-like or maple-like terminal segment, tending to be auriculate at base; middle and upper lvs few and much reduced; heads several or usually numerous in a corymbiform or more often paniculiform infl, narrow, with 5 yellow fls; invol merely calyculate, 9-11 mm in fr; achenes 4-5 mm, including the scarcely 1 mm beak, several-nerved on each face; outer row of pappus-bristles shorter than the inner; 2n=18. Moist places; native of n. Europe, now known from Que. and Me. to N.Y., w. to Mich. (Mycelis m.)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.

Mycelis muralis image
Mycelis muralis image
Mycelis muralis image
Mycelis muralis image
Mycelis muralis image
Amadej Trnkoczy  
Mycelis muralis image
Amadej Trnkoczy  
Mycelis muralis image
Amadej Trnkoczy  
Mycelis muralis image
Amadej Trnkoczy