Biennials, 15-80(-120) cm. Leaves on proximal 1/3-2/3 of each stem; blades of undivided cauline leaves ± ovate, margins denticu-late (sometimes ± ciliate), midribs usually piloso-setose. Heads in corymbiform to paniculiform arrays. Involucres 12-18+ mm. Phyllaries usually reflexed in fruit. Florets 12-24+; corollas usually yellow, sometimes drying bluish, usually deliquescent. Cypselae: bodies brown, ± flattened, elliptic, 4.5-5+ mm, beaks ± filiform, 2.5-3.5 mm, faces 1(-3)-nerved; pappi white, 6.5-8(-10+) mm. 2n = 34. Flowering Jul-Aug(-Sep). Openings in woods; 10-100 m; N.S., Ont., P.E.I., Que.; Ala., Ark., Conn., D.C., Ga., Ill., Ind., Ky., La., Maine, Md., Mass., Mich., Miss., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Tex., Vt., Va., W.Va. The type of Lactuca hirsuta may be conspecific with that of L. graminifolia.
