Compilation
Azolla caroliniana

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Name

Identification
Isotype of Azolla caroliniana Willd. [family AZOLLACEAE ] Verified by Not on sheet, Azolla filiculoides Lam. [family AZOLLACEAE ] (stored under name); Verified by Evrard E., 2002
Related name
  • Azolla magellanica
  • Azolla cristata
  • Azolla californica
  • Azolla caroliniana
  • Azolla filiculoides
  • Azolla mexicana
  • Azolla microphylla

Flora

Entry for Azolla caroliniana Willdenow [family AZOLLACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 2,
Names
Azolla caroliniana Willdenow [family AZOLLACEAE], Sp. Pl., 5(1): 541. 1810
Treatment Author(s)
Thomas A. Lumpkin
Information
Plants dark green or with margins of bright crimson or whole plants dark red, free-floating or forming multilayer mat to 4 cm thick under good conditions; plants infrequently fertile. Stems prostrate, 0.5--1 cm. Largest hairs on upper leaf lobe near stem with 2 or more cells; broad pedicel cell often 1/2 or more height of hair, apical cell curved, with tip nearly parallel to leaf surface. Megaspores without raised angular bumps or pits, densely and uniformly covered with tangled filaments.
Discussion
The sporophyte of Azolla caroliniana commonly survives throughout the year in temperate areas (with hard frosts and prolonged ice cover). It is the best adapted of all species for subsistence on mud. Azolla caroliniana is rarely collected with sporocarps.

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