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Lactuca floridana (L.) Gaertn.
WOODLAND LETTUCE
Life   Plantae   Dicotyledoneae   Asteraceae   Lactuca

Lactuca floridana, flower
© Copyright Cody Parmer 2010 · 4
Lactuca floridana, flower

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Lactuca floridana, flower
© Copyright Cody Parmer 2010 · 4
Lactuca floridana, flower
Lactuca floridana, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, whole plant - in flower - general view
Lactuca floridana, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, inflorescence - whole - unspecified
Lactuca floridana, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, inflorescence - whole - unspecified

Lactuca floridana, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, inflorescence - whole - unspecified
Lactuca floridana, leaf - basal or on lower stem
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, leaf - basal or on lower stem
Lactuca floridana, leaf - on upper stem
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, leaf - on upper stem
Lactuca floridana, stem - showing leaf bases
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, stem - showing leaf bases

Lactuca floridana, inflorescence - whole - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, inflorescence - whole - unspecified
Lactuca floridana, leaf - unspecified
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, leaf - unspecified
Lactuca floridana, whole plant - in flower - general view
© Copyright Steve Baskauf, 2002-2011 · 4
Lactuca floridana, whole plant - in flower - general view
Lactuca floridana, leaf base under
© Copyright Cody Parmer 2010 · 2
Lactuca floridana, leaf base under

Lactuca floridana, Woodland Lettuce
© John Pickering, 2004-2019 · 1
Lactuca floridana, Woodland Lettuce
Lactuca floridana, Woodland Lettuce
© John Pickering, 2004-2019 · 1
Lactuca floridana, Woodland Lettuce

Associates · map
FamilyScientific name @ source (records)
Aphididae  Aphis ( @ NCSU_ENT (1)
Diaporthaceae  Diaporthe orthoceras @ BPI (1)
Hypocreaceae  Hypomyces @ BPI (1)
Mycosphaerellaceae  Didymella subexerta @ BPI (5)

Septoria lactucicola @ BPI (7)
Peronosporaceae  Bremia lactucae @ BPI (5)
Pucciniaceae  Puccinia extensicola @ 066719A (1); BPI (1); 066719B (1)

Puccinia minussensis @ BPI (1)
Turritellidae  Vermicularia venturioidea @ BPI (1)

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Following modified from Delaware Wildflowers
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Delaware Wildflowers  •  Scientific names

Lactuca floridana (L.) Gaertn. ( Lactuca floridana var. villosa ) Woodland Lettuce
Asteraceae — Aster family
Rare native
Lactuca floridana
These flowers were on a small plant, about five feet tall.
Lactuca floridana
The inflorescence shown here was about three feet tall.  The plant was about eight feet tall. Brandywine Creek State Park
September 2004 Lactuca floridana
Two small plants Creek Road
August 2009

Guide to Lactuca of Delaware

Search Google Delaware USDA

Photos copyright David G. Smith

Delaware Wildflowers main page

Following modified from MissouriPlants.com
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Lactuca floridana (L.) Gaertn.

Wild Lettuce

Lactuca floridana plant

Family - Asteraceae

Stems - To +2.5m tall, purple, glabrous, single from the base, branching in inflorescence, from a taproot, with pure-white milky sap, erect, herbaceous.

Leaves - Alternate, sessile. Basal leaves toothed(dentate), pinnately lobed, to +15cm long, +9cm broad, terminal lobe triangular. Cauline leaves toothed, lobed to unlobed, glabrous, with triangular, sagittate terminal lobe.

Lactuca floridana leaves

Lactuca floridana leaves

Inflorescence - Paniculate arrangement of flower heads at the apex of the main stem.

Involucre - Vase shaped to cylindric. Phyllaries imbricate, green with purple apices.

Lactuca floridana involucre Involucre.

Ray flowers - 10-16 flowers per head. Corolla light blue, sometimes whitish. Ligules to 6mm long, apex toothed. Flower head +/-12mm broad, when fully opened. Achenes brown, to 5mm long, ribbed, typically with short beak. Pappus to +/-8mm long, of white capillary bristles in more than one series.

Lactuca floridana flowers Flower close-up.

Lactuca floridana fruits Fruits close-up.

Disc flowers - Absent.

Flowering - August - October.

Habitat - Open woods, thickets, disturbed sites, waste ground, streambanks, roadsides, railroads.

Origin - Native to U.S.

Other info. - Although the inflorescence can have over 100 flower heads at once, these open just a few at a time. The plant will secrete a pure-white milky juice if bruised. There are a few variations which are mostly differentiated on leaf shape and/or flower color. I won't go into those here.
Prior to flowering, this species greatly resembles another in the genus, L. canadensis  L. , but L. canadensis has sap with a salmon color to it.
The genus name may remind you of "lettuce" and indeed this genus is wild lettuce and is quite edible although slightly bitter. The next time you slice a head of store-bought lettuce, watch for the milky juice that comes from the leaves.

Photographs taken at the Kansas City Zoo, 10-25-99, and in Brown Summit, NC., 9-21-02.


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Following modified from Plants Database, United States Department of Agriculture
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http://plants.usda.gov/java/profile?symbol=LAFL ---> https://plants.usda.gov/java/profile?symbol=LAFL
https://plants.usda.gov/java/profile?symbol=LAFL ---> http://plants.usda.gov/core/profile?symbol=LAFL
http://plants.usda.gov/core/profile?symbol=LAFL ---> https://plants.usda.gov/core/profile?symbol=LAFL
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You are here: Home / Plant Profile

Lactuca floridana (L.) Gaertn.
woodland lettuce

Image of Lactuca floridana

General Information
Symbol: LAFL
Group: Dicot
Family: Asteraceae
Duration: Annual
Biennial
Growth Habit : Forb/herb
Native Status : CAN   N
L48   N
PR   N
Data Source and Documentation
About our new maps
Plants-NRCS Logos
green round image for nativity Native blue round image for introduced Introduced ocre round image for introduced and nativity Both white round image for no status Absent/Unreported
image for native, but no county data Native, No County Data image for introduced, but no county data Introduced, No County Data both introduced and native, but no county data Both, No County Data
Native Status:
lower 48 status L48    Alaska status AK    Hawaii status HI    Puerto Rico status PR    Virgin Islands status VI    Navassa Island NAV    Canada status CAN    Greenland status GL    Saint Pierre and Michelon status SPM    North America NA   

Images

click on a thumbnail to view an image, or see all the Lactuca thumbnails at the Plants Gallery

©Thomas G. Barnes. Barnes, T.G., and S.W. Francis. 2004. Wildflowers and ferns of Kentucky . University Press of Kentucky. Usage Requirements .

Steve Hurst. Provided by ARS Systematic Botany and Mycology Laboratory . United States, MD, Greenbelt. Usage Requirements .

Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. 3 vols. Charles Scribner's Sons, New York. Vol. 3: 321. Provided by Kentucky Native Plant Society . Scanned by Omnitek Inc . Usage Requirements .

slideshow

Synonyms

Classification

Click on a scientific name below to expand it in the PLANTS Classification Report.
Rank Scientific Name and Common Name
Kingdom Plantae – Plants
Subkingdom Tracheobionta – Vascular plants
Superdivision Spermatophyta – Seed plants
Division Magnoliophyta – Flowering plants
Class Magnoliopsida – Dicotyledons
Subclass Asteridae
Order Asterales
Family Asteraceae ⁄ Compositae – Aster family
Genus Lactuca L. – lettuce
Species Lactuca floridana (L.) Gaertn. – woodland lettuce

Subordinate Taxa

The Plants Database includes the following 2 subspecies of Lactuca floridana . Click below on a thumbnail map or name for subspecies profiles. Plant is native (blue) Native Plant is introduced Introduced Plant is introduced Native and Introduced Related taxa legend Distribution of <i>
Lactuca floridana</i>
(L.) Gaertn. var. <i>
floridana </i>
Lactuca floridana var. floridana
woodland lettuce Distribution of <i>
Lactuca floridana</i>
(L.) Gaertn. var. <i>
villosa</i>
(Jacq.) Cronquist
Lactuca floridana var. villosa
woodland lettuce

Legal Status

Threatened and Endangered Information:
This plant is listed by the U.S. federal government or a state. Common names are from state and federal lists. Click on a place name to get a complete protected plant list for that location.
Michigan woodland lettuce Threatened
New York false lettuce Endangered
U.S. Weed Information
Lactuca floridana woodland lettuce This plant can be weedy or invasive according to the authoritative sources noted below.This plant may be known by one or more common names in different places, and some are listed above. Click on an acronym to view each weed list, or click here for a composite list of Weeds of the U.S.
SWSS Southern Weed Science Society. 1998. Weeds of the United States and Canada. CD-ROM . Southern Weed Science Society. Champaign, Illinois.

Wetland Status

Interpreting Wetland Status

Top Level Regions
Caribbean FACU
North America
Atlantic and Gulf Coastal Plain FACU
Eastern Mountains and Piedmont FACU
Great Plains FAC
Midwest FACU
Northcentral & Northeast FACU

Related Links

More Accounts and Images
Integrated Taxonomic Information System (LAFL)
Lady Bird Johnson Wildflower Center Native Plant Information Network (LAFL)
Native Plants Network (LAFL)
USF Atlas of Florida Vascular Plants (LAFL)
University of Tennessee Herbarium (Distribution) (LAFL)
University of Wisconsin - Stevens Point Freckmann Herbarium (LAFL)

Wildlife

Food

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Cover

Source Large Mammals Small Mammals Water Birds Terrestrial Birds

Description of Values

Value Class Food Cover


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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Lactuca+floridana&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Lactuca+floridana&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Plant

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Number of matches : 2
Query: SELECT * FROM img WHERE ready=1 and taxon like "Lactuca floridana%" and (lifeform != "specimen_tag" OR lifeform != "Plant") ORDER BY taxon

Click on the thumbnail to see an enlargement

Lactuca floridana
Lactuca floridana
Woodland Lettuce
ID: 0000 0000 0215 3010 [detail]
© 2015 Richard Spellenberg

Lactuca floridana
Lactuca floridana
Woodland Lettuce
ID: 0000 0000 0215 3011 [detail]
© 2015 Richard Spellenberg

Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .   


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