Azolla Lam.

First published in Encycl. 1: 343 (1783)
This genus is accepted
The native range of this genus is Tropical & Subtropical Old World, Americas to Tristan da Cunha.

Descriptions

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Floating aquatic ferns with slender pinnately branched rhizomes and roots borne singly or in clusters
Morphology Leaves
Leaves alternate, imbricate, 2-lobed, with a green aerial lobe and a thin colourless hyaline lobe
Morphology Reproductive morphology Sori
Sori in thin-walled sporocarps borne on the basal leaf of a branch, megasporocarps with single megaspore with apical floating bodies, microsporocarps with numerous microsporangia and microspores embedded in massulae mostly with anchor-shaped outgrowths.
Note
Family of a single genus.
Ecology
The species live in symbiosis with a nitrogen-fixing blue-green alga, Anabaena azollae Strasb., colonies of which inhabit a cavity of the plant-body.
Distribution
Six species in most warmer parts of the world, introduced in Europe.
[FSOM]

Sources

  • Flora of Somalia

    • Flora of Somalia
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Herbarium Catalogue Specimens

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0