Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Morphology

Description

Perennials, (20–)30–40(–60) cm (rhizomes suberect or weakly spreading). Herbage lanate-arachnose or tomentose, unevenly glabrescent. Stems 1(–2). Leaves (often purplish abaxially) reduced distally; petiolate; blades ovate to subelliptic, (5–)6–10(–15) × (2.5–)3–5(–9) cm, bases tapered or contracted, margins subentire to denticulate (denticles callous; mid and distal leaves bractlike). Heads (2–)5–12(–20) in corymbiform arrays. Calyculi of 2–5+ bractlets (largest to 3 mm). Phyllaries (± 13) ± 21, 5–7 mm, tips green. Ray florets ± 13; corolla laminae 5–10 mm. Cypselae hairy (especially on angles). 2n = 40.
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Type Information

Isotype for Senecio arizonicus Greene
Catalog Number: US 47596
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): H. H. Rusby
Year Collected: 1883
Locality: Lynx Creek., Arizona, United States, North America
  • Isotype: Greene, E. L. 1883. Bull. Torrey Bot. Club. 10: 87.
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Isotype for Senecio arizonicus Greene
Catalog Number: US 47595
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): H. H. Rusby
Year Collected: 1883
Locality: Lynx Creek., Arizona, United States, North America
  • Isotype: Greene, E. L. 1883. Bull. Torrey Bot. Club. 10: 87.
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Source: National Museum of Natural History Collections

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N4 - Apparently Secure

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NatureServe Conservation Status

Rounded Global Status Rank: G4 - Apparently Secure

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Notes

Comments

Senecio arizonicus is reputedly in southern New Mexico (W. C. Martin and C. R. Hutchins 1980); that seems unlikely and should be checked.
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