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Ranunculus trichophyllus; Thread-leaved Water Crowfoot   

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Ranunculus trichophyllus
Ranunculus trichophyllus
Thread-leaved Water Crowfoot
Photographer: Dr. Amadej Trnkoczy

ID: 0000 0000 0220 0723 (2020-02-16)

Copyright © 2020 Dr. Amadej Trnkoczy

  • date of photo  Apr 24, 2018
  • latitude 45.09614   longitude 14.49151     View on Google Maps.
  • location   West island Krk, Adriatic Sea, between villages Poljica and Turčić (Kvarner bay, Croatia)
  • notes   Slo.: lasastolistna vodna zlatica - Habitat: Water pond in the midst of forest; flat terrain; calcareous ground; partly sunny; elevation 72 m (235 feet); average precipitations about 1.000 mm/year, average temperature 13-14 deg C, Sub-Mediterranean phytogeographical region. - Substratum: soil. - Comment: The number of species in the genus Ranunculus - buttercups - is very large (about 600). Vast majority of them are terrestrial plants. Several are well known and common inhabitants of meadows. Yet, a small group of them (subgenus Batrachium) is living in still or slowly running waters. They are all relatively rare because their habitats are quickly disappearing because of human greed for useful land. These plants are all very variable and change their habit greatly depending on growth conditions - from floods to almost dry mud. Hence, their determination is often difficult. This find seems relatively a simple case in this respect. Plants' robust habit (from 0.5 to 3 m long stems up to 5 mm in diameter), small flowers (max 12 mm in diameter; that is significantly less than with most probable alternatives Ranunculus peltatus or Ranunculus aquatilis), petals, which are relatively narrow and do not overlap, roundish receptacle (the part of the peduncle where the flowers are born), sickle shaped nectary groves, absence of leaves floating on water surface, soft underwater leaves (they stick together and form a 'brush' when taken out of water) and the fact that floating stems are not rooting at the nodes or eventually only weakly and near their base, all this speaks in favor of Ranunculus trichophyllus. - Ref.: (1) M.A. Fischer, W. Adler, K. Oswald, Exkursionsflora für Österreich, Liechtenstein und Südtirol, LO Landesmuseen, Linz, Austria (2005), p 280. (2) W.K. Rottensteiner, Exkursionsflora für Istrien, Verlag des Naturwissenschaftlichen Vereins Kärten (2014), p 791. (3) A. Martinči et all., Mala Flora Slovenije (Flora of Slovenia - Key) (in Slovenian), Tehnična Založba Slovenije (2007), p 141. (4) (x) K. Lauber and G. Wagner, Flora Helvetica, 5. Auflage, Haupt (2012), p 140. (5) H. Haeupler, T. Muer, Bildatlas der Farn- und Bluetenpflazen Deutschlands, Ulmer (2000), p 65.
  • camera   Sony ILCE6000 / Carl Zeiss Vario-Tessar E 16-70 mm/f4
  • contributor's ID #  Bot_1126/2018_DSC2186
  • photo category: Plant - annual/perennial

  • common names   Thread-leaved Water Crowfoot (photographer)
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    Using this photo   The thumbnail photo (128x192 pixels) on this page may be freely used for personal or academic purposes without prior permission under the Fair Use provisions of US copyright law as long as the photo is clearly credited with © 2020 Dr. Amadej Trnkoczy. For other uses, or if you have questions, contact Dr. Amadej Trnkoczy amadej.trnkoczy[AT] (Replace the [AT] with the @ symbol before sending an email.)


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