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Australian Waterbuttons

Cotula australis (Sieber ex Spreng.) Hook. fil.

Description

provided by eFloras
Annuals, 2–10(–25+) cm. Stems branched ± throughout, ± strigillose to villous, glabrescent. Leaves petiolate or sessile; blades obovate to spatulate, 2–3-pinnately lobed (ultimate lobes narrowly spatulate to linear), (1–)2–3(–6) cm. Involucres 3–4(–6) mm diam. Phyllaries 13–22+ in 2–3 series, subequal (apices brown). Ray florets 0 (peripheral pistillate florets 8–80+ in 1–3+ series; corollas 0). Disc corollas ochroleucous to pale yellow, 0.5–0.8 mm. Cypselae: outer stalked, 1–1.2 mm, ± winged, faces ± papillate; inner sessile, 0.8–1 mm, not winged, not papillate. 2n = 36, 40.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 544 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Synonym

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Anacyclus australis Sieber ex Sprengel, Syst. Veg. 3: 497. 1826
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 19: 544 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Derivation of specific name

provided by Flora of Zimbabwe
australis: southern
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Cotula australis (Sieb. & Spreng) Hook.f. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160850
author
Mark Hyde
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Bart Wursten
author
Petra Ballings
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Flora of Zimbabwe

Description

provided by Flora of Zimbabwe
Annual, prostrate or ascending, herb, to 25 cm. Leaves 2-pinnatifid, oblanceolate in outline, thinly pubescent; base semi-amplexicaul. Capitula solitary, terminal, ± flattened, borne on a long peduncle, 1.5-7.5 cm long, much longer than in C. anthemoides. Phyllaries elliptic, with scarious margins, borne in 2 rows. Outer florets lacking a corolla; inner florets white or yellow-green; all florets stalked. Achenes dimorphic; those of outer florets elliptic, winged; those of inner florets obovoid, not winged.
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cc-by-nc
copyright
Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Cotula australis (Sieb. & Spreng) Hook.f. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160850
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
visit source
partner site
Flora of Zimbabwe

Frequency

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Occasional
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Cotula australis (Sieb. & Spreng) Hook.f. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160850
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
visit source
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Flora of Zimbabwe

Worldwide distribution

provided by Flora of Zimbabwe
Native of New Zealand and Australia; now widespread as a weed in the warmer parts of the Old and New Worlds
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Cotula australis (Sieb. & Spreng) Hook.f. Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=160850
author
Mark Hyde
author
Bart Wursten
author
Petra Ballings
original
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Flora of Zimbabwe

Comprehensive Description

provided by North American Flora
Lancisia australis (Sieber) Rydberg
Anacyclus australis Sieber; Spreng. Syst. 3: 497. 1826. Strongylosperma australe Less. Svn. Comp. 261. 1832. Colula australis Hook. f. Fl. Nov. Zeland. 1: 128. 1852.
A low annual ; stem diffuse and much branched, rarely more than 1 dm. high ; leaves 1-2 cm. long, once or twice pinnatifid with lanceolate or linear di-isions, more or less hirsute; heads solitarj' at the ends of the branches; peduncles 2-5 cm. long; involucre rotate, 5-6 mm. broad; bracts oblong, in 2 series, rounded at the apex, with white scarious margins; marginal flowers with slightly winged pedicels, in 2 or 3 series; disk-flowers short-pedicelled ; corollas cylindric, glandular-granuliferous, 1.5 mm. long; lobes 4, rounded-ovate; marginal achenes with broad wing-margins, broadly oval, truncate at the base, emarginate at the apex, glandular-hispidulous on the faces, 1.5 mm. long; disk-achenes oblong, merely margined.
Type locality: Australia.
Distribution: California to Utah and British Columbia; Maine; adventive from Australia and New Zealand.
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bibliographic citation
Per Axel Rydberg. 1916. (CARDUALES); CARDUACEAE; TAGETEAE, ANTHEMIDEAE. North American flora. vol 34(3). New York Botanical Garden, New York, NY
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Cotula australis

provided by wikipedia EN

Cotula australis is a species of plant in the daisy family known by the common names bachelor's buttons,[2] annual buttonweed,[3] southern waterbuttons and Australian waterbuttons. This small plant is native to Australia and New Zealand, but it is known in other areas of the world as a common weed (South America, California, Mexico, South Africa, etc.).[2][4][5][6][7][8]

Cotula australis grows low to the ground in a thin mat with some slightly erect, spindly stems. The leaves are divided and subdivided into fringelike lobes. The plant flowers in inflorescences only a few millimetres wide containing minuscule yellow disc florets surrounded by greenish brown bracts and rudimentary ray florets that have been reduced to pistils with no stamens or corolla. The fruit is a tiny winged achene about a millimetre wide.[9]

References

  1. ^ The Plant List, Cotula australis (Sieber ex Spreng.) Hook.f.
  2. ^ a b "Atlas of Living Australia, Cotula australis (Sieber ex Spreng.) Hook.f., Bachelor's Buttons". Archived from the original on 4 March 2016. Retrieved 11 June 2015.
  3. ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 26 June 2015. Retrieved 17 October 2014.
  4. ^ Hooker, Joseph Dalton 1853. Botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror in the Years 1839-1843 :under the command of Captain Sir James Clark Ross, part 2, Flora Novae-Zelandiae 1: 128
  5. ^ Biota of North America Program 2014 county distribution map
  6. ^ Jørgensen, P. M. & C. Ulloa Ulloa. 1994. Seed plants of the high Andes of Ecuador—A checklist. AAU Rep. 34: 1–443
  7. ^ Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2).
  8. ^ Turner, B. L. 1996. The Comps of Mexico: A systematic account of the family Asteraceae, vol. 6. Tageteae and Athemideae. Phytologia Memoirs 10: i–ii, 1–22, 43–93
  9. ^ Flora of North America, Cotula australis (Sieber ex Sprengel) Hooker f.

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Cotula australis: Brief Summary

provided by wikipedia EN

Cotula australis is a species of plant in the daisy family known by the common names bachelor's buttons, annual buttonweed, southern waterbuttons and Australian waterbuttons. This small plant is native to Australia and New Zealand, but it is known in other areas of the world as a common weed (South America, California, Mexico, South Africa, etc.).

Cotula australis grows low to the ground in a thin mat with some slightly erect, spindly stems. The leaves are divided and subdivided into fringelike lobes. The plant flowers in inflorescences only a few millimetres wide containing minuscule yellow disc florets surrounded by greenish brown bracts and rudimentary ray florets that have been reduced to pistils with no stamens or corolla. The fruit is a tiny winged achene about a millimetre wide.

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