Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Physical Description

Morphology

Description

Annuals, (10–)20–80 cm (roots relatively thin, branching). Herbage loosely arachno-tomen­tose, unevenly glabrate or glabrescent. Stems single. Leaves progressively reduced distally; petiolate (petioles broadly winged); blades ovate-lanceolate, 3–8(–10) × (1–)1.5–3(–4) cm, bases tapered or ± truncate, margins dentate to subentire (mid leaves subsessile, lanceolate; distal subulate, bractlike). Heads (1–)10–30 in corymbiform arrays. Calyculi of 2–8 bractlets (1–2+ mm). Phyllaries ± 13, (6–)7–10 mm, tips green to grayish. Ray florets ± 8; corolla laminae 8–15 mm. Cypselae hirtellous.
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Diagnostic Description

Synonym

Senecio ampullaceus var. floccosus Engelmann & A. Gray; S. ampullaceus var. glaberrimus Engelmann & A. Gray
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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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Wikipedia

Senecio ampullaceus

Senecio ampullaceus also known as Texas ragwort,[1] Texas squaw-weed, Texas groundsel,[3] and Texas butterweed[4] is a species of Senecio in the family Asteraceae and gets its Latin name ampullaceus from its flask shaped flower-head[5] and is a recommended native for landscape use in Texas where it came from.[6]

Description[edit]

The seedlings of S. ampullaceus often have a purplish color on the undersides of their leaves in the winter, especially along their midrib.[3] Flowering in early–mid spring,[7] Texas ragwort is a tall annual,[8] growing to from 20 centimeters (7.9 in) to 80 centimeters (31 in) tall and similar to S. quaylei.[7]

Stems and leaves: The leaves with broadly winged leaf stalks, grow from single stems; the nodes between leaves getting shorter and shorter higher on the stem. Ovate leaves with pointed tips 3 centimeters (1.2 in) to 10 centimeters (3.9 in) long by 1.5 centimeters (0.59 in) to 4 centimeters (1.6 in) wide with tapered bases. Leaves at the lower portion of the plant have more teeth on their edges than the leaves at the upper portion of the mature plant.[7]

Stems and leaves are covered loosely and unevenly with a mat of fine hairs, occasionally having no hairs.[7]

Flowers: Flowering stalks have 10 to 30 flower heads which as a group make a flat top to the whole plant. Each flower head is surrounded by 2 to 8 bractlets or mini-leaves, each 1 millimeter (0.039 in) to more than 2 millimeters (0.079 in). Approximately 13 green to grayish bracts, 7 millimeters (0.28 in) to 10 millimeters (0.39 in) long surrounding 8 ray florets and an 8 millimeters (0.31 in) to 10 millimeters (0.39 in) corolla.[7]

Fruits: One seeded fruits with rigid pappus.[7]

Roots: Roots relatively thin and branching.[7]

Distribution[edit]

S. ampullanceus prefers altitudes of 100 meters (330 ft) to 800 meters (2,600 ft) in open sandy or disturbed sites.[7]

Native:

Native range of S. ampullaceus
Nearctic:
North-central United States: Missouri
Southeastern United States: Arkansas
South-central United States: Texas[1]

or

Southeastern United States: Arkansas
South central United States: Texas[9]

Current:

Nearctic:
North-central United States: Missouri, Oklahoma
Southeastern United States: Arkansas
South-central United States: Texas[1][10][11]

Varieties or subspecies which are synonyms[edit]

References[edit]

  1. ^ a b c d Natural Resources Conservation Service (NRCS). "PLANTS Profile, Senecio ampullaceus Hook.". The PLANTS Database. United States Department of Agriculture,. Retrieved 2008-04-08. 
  2. ^ Integrated Taxonomic Information System Organization (ITIS). "Senecio ampullaceus Hook.". Integrated Taxonomic Information System on-line database. Retrieved 2008-04-08. 
  3. ^ a b Texas A&M University. "Texas Groundsel, Texas Squaw-Weed" (PDF). Retrieved 2008-04-10. [dead link]
  4. ^ Peterson Field Guide, Theodore F. Niehaus (1998) [1984]. "Tall-stemmed Butterweeds". A Field Guide to Southwestern and Texas Wildflowers. The Peterson Field Guide Series. Illustrations by Charles L. Ripper. New York, New York 100003: Houghton Mifflin Company. pp. 449 pages. ISBN 0-395-93612-8. Retrieved 2008-04-09. 
  5. ^ Holloway, Joel Ellis; Neill, Amanda (2005). "Section 36". A Dictionary of Common Wildflowers of Texas & the Southern Great Plains. TCU Press. p. 2005. ISBN 0-87565-309-X. Retrieved 2008-04-08. 
  6. ^ Federal Highway Administration (2005-07-11). "Native Plants for Landscape Use in Texas". State Plant Listings. United States Department of the Interior. Retrieved 2008-04-08. 
  7. ^ a b c d e f g h i Flora of North America. 32. Senecio ampullaceus Hooker 20. pp. Page 548, 561. Retrieved 2008-04-08. 
  8. ^ University of Texas at Austin. "Senecio ampullaceus". Image Archive of Central Texas Plants. University of Texas at Austin. Retrieved 2008-04-08. 
  9. ^ Flora of Missouri. Senecio ampullaceus Hook. 2. pp. Page 1654. Retrieved 2008-04-08. 
  10. ^ Walter C. Holmes, Jason R. Singhurst, Steve G. Powers (September 2006). "SENECIO AMPULLACEUS (ASTERACEAE): A WEST GULF COASTAL PLAIN ENDEMIC NEW TO OKLAHOMA" (PDF). Phytologia 88 (2): 193–195. Retrieved 2008-04-08. 
  11. ^ Ozarks Regional Herbarium (2002-06-26). "ADVENTIVE TAXA OF MISSOURI". CONTRIBUTIONS OF THE OZARKS REGIONAL HERBARIUM. Missouri State University. Retrieved 2008-04-08. 
  12. ^ Missouri Botanical Garden. "Senecio ampullaceus Hook.". Missouri Botanical Garden Press. Retrieved 2008-04-08. 
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Notes

Comments

Senecio ampullaceus has been reported for Arkansas and Missouri (St. Louis). It is similar to S. quaylei.
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