Overview
Distribution
Localities documented in Tropicos sources
Senecio amplectens A. Gray:
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.
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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Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
http://www.tropicos.org/Reference/1103
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National Distribution
United States
Origin: Unknown/Undetermined
Regularity: Regularly occurring
Currently: Unknown/Undetermined
Confidence: Confident
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Physical Description
Morphology
Description
Perennials, (5–)10–60 cm (rhizomatous or with branched caudices). Herbage (often purplish-tinged) glabrous or sparsely and unevenly hairy, especially near leaf axils and among heads, usually glabrescent. Stems single or loosely clustered. Leaves usually progressively reduced distally (basal sometimes smaller than proximal or mid leaves); petiolate (petioles shorter than to equaling blades, often clasping); blades broadly lanceolate or lanceolate to oblanceolate, (5–)10–20+ × 2–4(–5+) cm, bases tapered, margins dentate to denticulate (distal leaves smaller, bractlike). Heads nodding, 1–5(–10). Calyculi of 2–5+ linear to filiform bractlets (lengths to 1 / 2 phyllaries). Phyllaries ± 13 or ± 21, tips often black or brownish (sometimes with scattered black hairs). Ray florets usually ± 13, sometimes fewer; corolla laminae (10–)15–25 mm. Cypselae glabrous. 2n = 40, ca. 175–180.
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Diagnostic Description
Type Information
Isotype for Senecio amplectens A. Gray
Catalog Number: US 1400109
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): C. C. Parry
Year Collected: 1862
Locality: Colorado, United States, North America
Catalog Number: US 1400109
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): C. C. Parry
Year Collected: 1862
Locality: Colorado, United States, North America
- Isotype: Gray, A. 1862. Amer. J. Sci. ser. 2. 33: 240.
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Conservation
Conservation Status
National NatureServe Conservation Status
United States
Rounded National Status Rank: NNR - Unranked
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Notes
Comments
The varieties of Senecio amplectens are distinguished by morphologic tendencies and habitat preferences; there are many intermediates. Where the ranges of the two overlap, var. amplectens occurs at slightly lower elevations than var. holmii.
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