Caltha

Marsh Marigold ( Caltha palustris)

The marigold ( Caltha ) are a genus of flowering plants of the family Ranunculaceae ( Ranunculaceae ). To this genus includes ten species from the temperate zones of both hemispheres. The name Caltha can be etymologically traced back to the Greek term for calyx ( calyx ).

Description

Marigold species are perennial, herbaceous plants. They form rhizomes as outlasting. All plant parts are bare. The change-constant leaves are simple and heart-shaped. In some species, a bent attachment is formed from the ears of the leaf blade. Stipules absent.

The flowers are single or few in zymösen inflorescences. The hermaphrodite flowers are radial symmetry. The perianth consists of a single circle of five or more kronblattartigen, golden yellow or white sepals. The 15 to 25 stamens are shorter than the sepals. The four to fifteen free and Upper constant carpels stand upright together several. Each carpel contains several ovules in two rows. The hairless follicles stand together several.

Occurrence

The genus preferred cooler areas and is found in the temperate and cold regions of the northern and southern hemispheres, which in the southern hemisphere only limiting resources exist, what is likely to be justified by the lack of suitable sites. All species of the genus prefer moist locations. At lower altitudes the species of swamps and other wetlands is bound at higher altitudes it is often associated with meltwater. In Australia, two species occur

System

The genus Caltha is subdivided on the basis of morphological and geographical differences in two sections with a total of ten species. Section Psychrophyla is common with six species in the southern hemisphere and has bent attachments on to the leaves; the Caltha section with four species is widespread in the northern hemisphere and forms no leaf attachments. This division of the genus was confirmed by molecular studies.

  • Section Caltha West American marigold ( Caltha leptosepala DC. ), Origin: Alaska, Western Canada, Western U.S., Rocky Mountains
  • Floating Marsh Marigold ( Caltha natans Pall. ), Origin: North Asia, Alaska, Canada, Minnesota, Wisconsin
  • Marsh Marigold ( Caltha palustris L.), Origin: Europe, Asia, North America
  • Caltha scaposa Hook. f & Thomson, Origin: Himalayas
  • Caltha appendiculata bed, home. Argentina
  • . Caltha dionaeifolia Hook, Origin: Argentina
  • Caltha novae- zelandiae Hook. f, Origin: New Zealand
  • Caltha obtusa Cheeseman, Origin: New Zealand
  • Caltha sagittata Cav. ( Syn: psychrophila sagittata ( Cav. ) Bercht & J. Presl. ), Origin: southern tip of South America

Swell

  • L. Villar: Caltha. In: Flora Iberica. Plantas de la Península Ibérica vasculares e Islas Baleares, Volume I - Lycopodiaceae - Papaveraceae. 1986, ISBN 84-00-06222-1, pp. 231-233 ..
  • Eric Schuettpelz, Sara B. Hoot: Phylogeny and biogeography of Caltha ( Ranunculaceae ) based on chloroplast and nuclear DNA sequences. In: American Journal of Botany. Volume 91, Number 2, 2004. Pp. 247-253.
  • Walter Erhardt et al: The big walleye. Encyclopedia of plant names. Volume 2 Eugen Ulmer Verlag, Stuttgart, 2008. ISBN 978-3-8001-5406-7
Trollius europaeus
160071
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