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Smith, R.W.

Lactuca biennis

Lactuca biennis (Moench) Fernald

Tall Blue Lettuce

Asteraceae (Aster Family)

Synonym(s): Lactuca spicata, Lactuca spicata var. integrifolia, Mulgedium spicatum, Mulgedium spicatum var. integrifolium

USDA Symbol: LABI

USDA Native Status: L48 (N), AK (N), CAN (N), SPM (N)

From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual , Biennial
Habit: Herb
Root Type: Tap
Size Notes: Up to about 10 feet tall, often much shorter.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White , Blue
Bloom Time: Jul , Aug , Sep , Oct

Distribution

USA: AK , CA , CO , CT , DC , DE , IA , ID , IL , IN , KY , MA , MD , ME , MI , MN , MT , NC , ND , NH , NJ , NY , OH , OR , PA , RI , SD , TN , UT , VA , VT , WA , WI , WV , WY
Canada: AB , BC , MB , NB , NL , NS , ON , PE , QC , SK , YT
Native Habitat: Forest Edge

Growing Conditions

Water Use: Medium , High
Light Requirement: Part Shade
Soil Moisture: Moist , Wet

Benefit

Conspicuous Flowers: yes

Find Seed or Plants

Find seed sources for this species at the Native Seed Network.

National Wetland Indicator Status

Region:	AGCP	AK	AW	CB	EMP	GP	HI	MW	NCNE	WMVE
Status:	FACU	FACU	FAC		FACU	FAC		FAC	FAC	FAC

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Native Seed Network - Corvallis, OR

Web Reference

Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Lactuca biennis in USDA Plants
FNA: Find Lactuca biennis in the Flora of North America (if available)
Google: Search Google for Lactuca biennis

Metadata

Record Modified: 2022-12-29
Research By: TWC Staff

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