Greater water-moss Fontinalis antipyretica, copyright Tab Tannery.

Belongs within: Bryidae.

The Fontinalaceae are a group of aquatic, floating mosses that are adhered to the substrate only at their base (Dixon 1924).

Characters (from Dixon 1924): Leaves in several rows or tristichous, nerveless or single-nerved, cells rhomboid—hexagonal, or linear and subvermincular, long, smooth. Capsule immersed or shortly exserted; annulus absent. Calyptra cucullate or mitriform, glabrous. Peristome of 16 outer teeth, transversely articulate and trabeculate on inner face, and an inner peristome of 16 cilia more or less completely united with one another by transverse partitions at regular intervals.

<==Fontinalaceae D24
    |--Dichelyma capillaceum D24
    `--Fontinalis D24
         |--F. antipyretica D24
         |    |--F. a. var. antipyretica D24
         |    |--F. a. var. cymbifolia Nicholson 1901 D24
         |    |--F. a. var. gigantea D24
         |    |--F. a. var. gracilis D24
         |    `--F. a. var. laxa D24
         |--F. arvernica D24
         |--F. dalecarlica D24
         |--F. dixoni Cardot in Dixon 1924 D24
         |--F. dolosa Cardot in Dixon 1924 D24
         |--F. hypnoides D24
         |--F. kindbergii D24
         |--F. seriata D24
         `--F. squamosa D24
              |--F. s. var. squamosa D24
              `--F. s. var. curnowii D24

*Type species of generic name indicated


[D24] Dixon, H. N. 1924. The Student's Handbook of British Mosses 3rd ed. V. V. Sumfield: Eastbourne.

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