Lactuca hirsuta

Muhlenberg ex Nuttall

Gen. N. Amer. Pl. 2: 124. 1818.

Endemic
Synonyms: Lactuca hirsuta var. albiflora (Torrey & A. Gray) Shinners Lactuca hirsuta var. sanguinea (Bigelow) Fernald
Treatment appears in FNA Volume 19. Treatment on page 262. Mentioned on page 260.

Biennials, 15–80(–120) cm. Leaves on proximal 1/3–2/3 of each stem; blades of undivided cauline leaves ± ovate, margins denticulate (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.


Phenology: Flowering Jul–Aug(–Sep).
Habitat: Openings in woods
Elevation: 10–100 m

Distribution

V19-352-distribution-map.gif

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.

Discussion

The type of Lactuca hirsuta may be conspecific with that of L. graminifolia.

Selected References

None.

Lower Taxa

None.
... more about "Lactuca hirsuta"
John L. Strother +
Muhlenberg ex Nuttall +
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. +  and W.Va. +
10–100 m +
Openings in woods +
Flowering Jul–Aug(–Sep). +
Gen. N. Amer. Pl. +
Lactuca hirsuta var. albiflora +  and Lactuca hirsuta var. sanguinea +
Lactuca hirsuta +
species +