Lactuca canadensis wild lettuce Asteraceae LACA2; Bx, pb, sd, sf; NY, hb; Q, a, cu, f, j; K, pl; R, cl, d, hs, js, pr, ro, sv, wp;

  

Lactuca-canadensis.Steven Baskauf. Copyright © 2015 CC-BY-NC-SA. Bioimages - www.cas.vanderbilt.edu:bioimages:frame

Lactuca-canadensis.Steven Baskauf. Copyright © 2015 CC-BY-NC-SA. Bioimages – www.cas.vanderbilt.edu:bioimages:frame (Accessed 2/2015).

Lactuca canadensis is an annual or biennial herb, 0.3 -2.5 m tall, sap milky, white to tan, stem leafy, often waxy-pale (glaucous). 

Leaves alternate, entire to lobed, margin toothed or lobed to entire, base narrowed, or sometimes clasping stem or with pointed lobes, blade 10-35 cm long, 1.5-12 cm wide, leaves of basal rosette to 35 cm. 

Flowers yellow, all rays, 13-22 per head, bracteate base to 1-1.5 cm tall in fruit, heads numerous; inflorescence branched, July-Sept. 

Fruit dry, 1-seeded achenes, blackish, very flat with one vein on each face, to 0.6 cm, with white plume on a narrow beak; seeds eaten by birds, plants eaten by deer (Martin et al. 1951). 

Wetland status: FACU-. 

Frequency in NYC: Occasional. 

Origin: Native 

Lactuca canadensis.Larry Allain @ USDA-NRCS PLANTS Database

Lactuca canadensis.Larry Allain @ USDA-NRCS PLANTS Database (Accessed 52014).

Habitat: Open woods, edges, thickets, vacant lots.