Robert W. Freckmann Herbarium


  Lactuca biennis (Moench) Fernald image
Photographer: Merel R. Black           

Kenneth J. Sytsma

Merel R. Black

Merel R. Black

Merel R. Black

Merel R. Black

Merel R. Black
Family Asteraceae
Lactuca biennis (Moench) Fernald
tall blue lettuce, woodland lettuce
Lactuca: name for "milk"
biennis: biennial, completing the life cycle in two growing seasons, usually blooming and fruiting in the second
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
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Status: Native
Plant: erect, annual/biennial, 2' -6 1/2' tall, mostly smooth forb with milky juice; stems very leafy
Flower: head 3/8" wide with 15-34 bluish to white rays; inflorescence with many heads in long, narrow clusters; blooms July-Sept.
Fruit:dry seed with several obvious lines on both sides, and with tan, fluffy pappus
Leaf:either pinnately-divided or toothed, sometimes with arrow-shaped bases
Habitat: moist; thickets
(Glossary)

More Information Natural Communities Herbarium Specimens
All Lactuca list Ethnobotany Information Google- Images or Text

Flora of North America (off site)
Synonyms 
Lactuca biennis (Moench) Fernald f. aurea (Jenn.) Fernald
Lactuca biennis (Moench) Fernald f. integrifolia (Torr. & A.Gray) Fernald
Lactuca spicata auct. non (Lam.) Hitchc.
Lactuca spicata (Lam.) Hitchc. var. integrifolia (Torr. & A.Gray) Britton
Mulgedium spicatum auct. non (Lam.) Small
Mulgedium spicatum (Lam.) Small var. integrifolium (Torr. & A.Gray) Small
Sonchus biennis Moench

         
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