Overview

Distribution

National Distribution

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Morphology

Description

Plants caulescent, 30–200 cm; fibrous rooted. Stems terete, glabrous, hirsute, hispid, or scabrous. Leaves: basal persistent or caducous, petiolate or sessile; cauline alternate, opposite, or whorled, petiolate or sessile; blades simple, lanceolate, falcate, or ovate, 1.5–25 × 0.5–5 cm, bases attenuate to round, margins dentate, serrate, or entire, apices acuminate, acute, or obtuse, faces glabrous, hirsute, hispid, or scabrous. Phyllaries 12–26 in 2–3 series, outer appressed or reflexed, apices acute to acuminate, abaxial faces hispid or scabrous. Ray florets 8–21; corollas yellow. Disc florets 35–150; corollas yellow. Cypselae 6–15 × 4–11 mm; pappi 0–5 mm.
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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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National NatureServe Conservation Status

United States

Rounded National Status Rank: NNR - Unranked

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NatureServe Conservation Status

Rounded Global Status Rank: G5 - Secure

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Wikipedia

Silphium asteriscus

Silphium asteriscus also known as starry rosinweed is the type species[1][4][5] of the genus Silphium and a member of the family Asteraceae.[3]

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References[edit]

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Names and Taxonomy

Taxonomy

Comments: The treatment of Silphium asteriscus followed here (Kartesz 1994) and Kartesz (1999) excludes S. simpsonii and S. trifoliatum as distinct species.

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Comments: Silphium asteriscus sensu FNA (vol. 21, 2006c) includes S. trifoliatum (both varieties) and S. simpsonii, which were accepted as distinct by Kartesz (1999). Crosswalk of Kartesz (1999) to FNA (2006) seems to be (intepreted from Weakley, 2011 draft): Kartesz's S. asteriscus var. angustatum and var. laevicaule are included in FNA's S. asteriscus var. dentatum (though var. laevicaule is not mentioned in synonymy), Kartesz's S. asteriscus var. asteriscus = FNA's S. asteriscus var. asteriscus, Kartesz's S. trifoliatum var. latifolium = FNA's S. asteriscus var. latifolium, Kartesz's S. trifoliatum var. trifoliatum = FNA's S. asteriscus var. trifoliatum and Kartesz's S. simpsonii = FNA's S. asteriscus var. simpsonii.

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