Lactuca floridana — Details

Blue Woodland Lettuce learn more about names for this taxon

Overview

Distribution

Localities documented in Tropicos sources

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Sonchus floridanus L.:
Canada (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Mulgedium floridanum (L.) DC.:
United States (North America)

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Mulgedium villosum (Jacq.) Small:
United States (North America)

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Lactuca floridana fo. floridana :
United States (North America)

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Localities documented in Tropicos sources

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Lactuca floridana var. floridana :
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Lactuca floridana var. villosa (Jacq.) Cronquist:
United States (North America)

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Lactuca floridana (L.) Gaertn.:
China (Asia)
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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National Distribution

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Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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National Distribution

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Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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National Distribution

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Canada

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

Type of Residency: Year-round

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Physical Description

Morphology

Description

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Annuals or biennials, 25–150(–200+) cm. Leaves on proximal 2/3–3/4 of each stem; blades of undivided cauline leaves oblong, ovate, or elliptic, margins entire or denticulate, midribs sometimes sparsely pilose. Heads in (± pyramidal) paniculiform arrays. Involucres (8–)10–12+ mm. Phyllaries usually reflexed in fruit. Florets 10–15(–25+); corollas bluish or whitish, seldom deliquescent. Cypselae: bodies brown (often mottled), ± compressed-lanceoloid to -fusiform, 4–5 mm, beaks ± stout, 0.1–0.5(–1) mm, faces 5–6-nerved; pappi white, 4–5 mm. 2n = 34.
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Diagnostic Description

Synonym

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Sonchus floridanus Linnaeus, Sp. Pl. 2: 794. 1753; Lactuca floridana var. villosa (Jacquin) Cronquist; Mulgedium floridanum (Linnaeus) de Candolle
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Ecology

Associations

Flower-Visiting Insects of Blue Woodland Lettuce in Illinois

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Lactuca floridana (Blue Woodland Lettuce)
(Bees suck nectar, collect pollen, or feed on pollen; other insects suck nectar; all observations are from Robertson)

Bees (long-tongued)
Apidae (Apinae): Apis mellifera sn cp fq; Apidae (Bombini): Bombus auricomus sn, Bombus impatiens sn cp; Anthophoridae (Ceratinini): Ceratina dupla dupla sn; Anthophoridae (Eucerini): Melissodes boltoniae sn, Svastra obliqua obliqua sn fq

Bees (short-tongued)
Halictidae (Halictinae): Halictus ligatus sn cp, Lasioglossum imitatus cp np, Lasioglossum pectoralis cp np, Lasioglossum pilosus pilosus cp np; Colletidae (Colletinae): Colletes americana sn; Colletidae (Hylaeinae): Hylaeus affinis fp np

Beetles
Cantharidae: Chauliognathus pennsylvanicus sn fq
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Source: Insect Visitors of Illinois Wildflowers

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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Lactuca floridana

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 0
Specimens with Barcodes: 1
Species With Barcodes: 1
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Conservation

Conservation Status

NatureServe Conservation Status

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Rounded Global Status Rank: T5 - Secure

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NatureServe Conservation Status

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Rounded Global Status Rank: G5 - Secure

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National NatureServe Conservation Status

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Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: N5 - Secure

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NatureServe Conservation Status

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Rounded Global Status Rank: T5 - Secure

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National NatureServe Conservation Status

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Canada

Rounded National Status Rank: N2 - Imperiled

United States

Rounded National Status Rank: N5 - Secure

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National NatureServe Conservation Status

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Canada

Rounded National Status Rank: N2 - Imperiled

United States

Rounded National Status Rank: N5 - Secure

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Notes

Comments

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The "double" pappi of Lactuca floridana (and L. biennis) are very similar to pappi found in species assigned to Cicerbita Wallroth (ca. 35 spp., Europe, Asia, Africa). Return of the species to Cicerbita as C. floridana (Linnaeus) Wallroth may have merit.
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