Flora of Newfoundland and Labrador
Flora of Newfoundland and Labrador
Asteraceae/ Astéracées - Aster Family
Lactuca biennis (Moench) Fernald
En: tall blue lettuce, blue wood lettuce, biennial lettuce
Fr: laitue bisannuelle
Provincial Status: LN
Range: Boreal NA; sw/w/nw/ne/s/cNfld., N to cLab.

[=Sonchus biennis Moench (basionym)]
[=Cicerbita canadensis (L.) Farw. var. integrifolia (Torr. & A.Gray) Farw.]
[=Cicerbita spicata (Lam.) Beauverd var. integrifolia (Torr. & A.Gray) Beauverd]
[=Galathenium multiflorum (DC.) Nutt.]
[=Lactuca biennis (Moench) Fernald forma aurea (Jenn.) Fernald]
[=Lactuca biennis (Moench) Fernald forma integrifolia (Torr. & A.Gray) Fernald]
[=Lactuca leucophaea A.Gray var. integrifolia (Torr. & A.Gray) A.Gray]
[=Lactuca spicata (Lam.) Hitchc.]
[=Lactuca spicata (Lam.) Hitchc. forma integrifolia (Torr.& A.Gray) Jenn.]
[=Lactuca spicata (Lam.) Hitchc. var. aurea Jenn.]
[=Lactuca spicata (Lam.) Hitchc. var. integrifolia (Torr.& A.Gray) Britton]
[=Lactuca terrae-novae Fernald (type: Barr'd Harbour Hill, Highlands of St. John, nwNfld.)]
[=Mulgedium leucophaeum DC. var. integrifolium Torr. & A.Gray]
[=Mulgedium multiflorum DC.]
[=Sonchus leucophaeus Willd., nom. illeg.]

[Lactuca canadensis is listed in Day (1999) from the Goose Bay area and Kenemich River, but FNA shows the nearest distribution in southern Québec and Nova Scotia; it is likely that this report is based on a misidentification of Lactuca biennis. Labrador reports of Lactuca canadensis require validation. According to Fernald (Rhodora 42:300, 1940, the name Lactuca spicata has been misapplied to the taxon better known as L. biennis (Moench) Fernald, but was in fact based on plants of the taxon now called Prenanthes autumnalis.]

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