Cephalomanes atrovirens


Cephalomanes atrovirens is a species of fern in the family Hymenophyllaceae. The genus Cephalomanes is accepted in the Pteridophyte Phylogeny Group classification of 2016, but not by some other sources., Plants of the World Online sank the genus into a broadly defined Trichomanes, while treating the subtaxa of this species as the separate species Trichomanes acrosorum, Trichomanes atrovirens, Trichomanes boryanum and Trichomanes kingii.

Subtaxa

Two subspecies and two forms have been recognized, all of which have been recognized as separate species in the genus Trichomanes by other sources:
  • Cephalomanes atrovirens ssp. atrovirens, syn. Trichomanes atrovirens Kunze
  • Cephalomanes atrovirens ssp. boryanum K.Iwats., syn. Trichomanes boryanum Kunze
  • Cephalomanes atrovirens f. acrosorum K.Iwats., syn. Trichomanes acrosorum Copel.
  • Cephalomanes atrovirens f. kingii K.Iwats., syn. Trichomanes kingii Copel.

Distribution

The species as a whole is native to the Ryukyu Islands, Malesia, Papuasia, the northwestern Pacific, the southwestern Pacific and eastern Australia.
The two subspecies recognized by the Checklist of Ferns and Lycophytes of the World have distinct distributions. C. atrovirens subsp. atrovirens is native to the Ryukyu Islands, eastern tropical Asia and eastern Australia. C. atrovirens subsp. boryanum is found further east, being native to New Guinea, the Bismarck Archipelago and islands of the western Pacific.
The two forms have a narrower distribution. Both are found in New Guinea. C. atrovirens f. acrosorum is also native to Micronesia and the Solomon Islands, whereas C. atrovirens f. kingii is also native to the Santa Cruz Islands.