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Salviniaceae

  • Fritz H. Schweingruber
  • Andrea Kučerová
  • Lubomír Adamec
  • Jiří Doležal
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Abstract

Annual, free-floating rootless heterosporous fern, overwinters only in the form of spores in sporocarps forming under senescing leaves. Shoots 3–5 cm long bear whorls of three leaves: a pair of floating leaves 12–20 mm long and a submerged, thin and filamentous leaf 3–6 cm long with numerous hairs reminding a root (rhizophyll), floating leaves densely covered by 1–1.5 mm long hairs repelling water. Three-mm large sporocarps contain either small dark brown microspores or larger whitish macrospores, membraneous prothallium ca. 2 mm large, terrestrial form known.

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© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Fritz H. Schweingruber
    • 1
  • Andrea Kučerová
    • 2
  • Lubomír Adamec
    • 2
  • Jiří Doležal
    • 3
  1. 1.Institute of Forest, Snow and Landscape Research – WSLBirmensdorfSwitzerland
  2. 2.Czech Academy of SciencesInstitute of BotanyTřeboňCzech Republic
  3. 3.Czech Academy of Sciences, Institute of Botany, Třeboň, Czech Republic; Faculty of ScienceUniversity of South Bohemiačeské BudějoviceCzech Republic

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