Vernonia glauca — Details

Broadleaf Ironweed learn more about names for this taxon

Overview

Distribution

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Vernonia glauca (L.) Willd.:
United States (North America)
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National Distribution

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United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Physical Description

Morphology

Description

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Plants 6–10+ dm. Stems sparsely appressed-puberulent, glabrescent. Leaves mostly cauline; blades lanceolate to oblanceolate, 10–15(–18+) cm × 30–45(–70+) mm, l/w = 2.5–3.5(–4), abaxially scabrellous (hairs awl-shaped), resin-gland-dotted or not, adaxially glabrous or sparsely puberulent. Heads in corymbiform to paniculiform arrays. Peduncles 2–35 mm. Involucres ± hemispheric, 5–8 × 7–8 mm. Phyllaries 40–60 in 5–6 series, sparsely puberulent to tomentulose, glabrescent, margins ciliolate, the outer lance-deltate to subulate, 1–3 mm, inner oblong, 4–7+ mm, tips acuminate to subulate or filiform. Florets 30–45+. Cypselae 3–4 mm; pappi stramineous to whitish, outer subulate scales or bristles 30, 0.5–1.5+ mm, intergrading with 30+, 6–8 mm inner subulate scales or bristles. 2n = 34.
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Diagnostic Description

Synonym

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Serratula glauca Linnaeus, Sp. Pl. 2: 818. 1753
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Conservation

Conservation Status

National NatureServe Conservation Status

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United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

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Rounded Global Status Rank: G5 - Secure

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