''Cephalomanes atrovirens'' is a species of fern in the family

Hymenophyllaceae The Hymenophyllaceae, the filmy ferns and bristle ferns, are a family of two to nine genera (depending on classification system) and about 650 known species of ferns, with a subcosmopolitan distribution, but generally restricted to very damp pl ...

. The genus '' Cephalomanes'' is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), but not by some other sources. , ''

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

'' sank the genus into a broadly defined ''

Trichomanes ''Trichomanes'' is a genus of ferns in the family Hymenophyllaceae, termed bristle ferns. The circumscription of the genus is disputed. All ferns in the genus are filmy ferns, with leaf tissue typically 2 cells thick. This thinness generally ...

'', 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. The Botanical and Zoological Codes of nomenclature treat the concept of synonymy differently. * In botanical nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name. For example, Linnae ...

''Trichomanes atrovirens'' (C.Presl) Kunze ::Other synonyms: ::*''Cephalomanes rhomboideum'' J.Sm. ex Bosch ::*''Trichomanes rhomboideum'' J.Sm. *''Cephalomanes atrovirens'' ssp. ''boryanum'' (Kunze) K.Iwats., syn. ''Trichomanes boryanum'' Kunze ::Other synonyms: ::*''Cephalomanes alatum'' C.Presl ::*''Cephalomanes australicum'' Bosch ::*''Cephalomanes boryanum'' (Kunze) Bosch ::*''Cephalomanes wilkesii'' Bosch ::*''Lacostea boryana'' Prantl ::*''Trichomanes alatum'' Bory ::*''Trichomanes australicum'' (Bosch) Copel. ::*''Trichomanes javanicum'' var. ''boryanum'' (Kunze) Fosberg *''Cephalomanes atrovirens'' f. ''acrosorum'' (Copel.) K.Iwats., syn. ''Trichomanes acrosorum'' Copel. ::Other synonyms: ::*''Cephalomanes acrosorum'' (Copel.) Copel. *''Cephalomanes atrovirens'' f. ''kingii'' (Copel.) K.Iwats., syn. ''Trichomanes kingii'' Copel. ::Other synonyms: ::*''Cephalomanes kingii'' (Copel.) Copel.

Distribution

The species as a whole is native to the Ryukyu Islands, Malesia (the Philippines and

Sulawesi Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Ar ...

), Papuasia ( New Guinea, the

Bismarck Archipelago The Bismarck Archipelago (, ) is a group of islands off the northeastern coast of New Guinea in the western Pacific Ocean and is part of the Islands Region of Papua New Guinea. Its area is about 50,000 square km. History The first inhabitants o ...

, and the Solomon Islands), the northwestern Pacific (the

Mariana Islands The Mariana Islands (; also the Marianas; in Chamorro: ''Manislan Mariånas'') are a crescent-shaped archipelago comprising the summits of fifteen longitudinally oriented, mostly dormant volcanic mountains in the northwestern Pacific Ocean, betw ...

, Palau, the Caroline Islands, and the Federated States of Micronesia), the southwestern Pacific (

Fiji Fiji ( , ,; fj, Viti, ; Fiji Hindi: फ़िजी, ''Fijī''), officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists ...

, Samoa, Tonga, the Santa Cruz Islands, and Vanuatu) and eastern Australia ( Queensland, New South Wales,

Norfolk Island Norfolk Island (, ; Norfuk: ''Norf'k Ailen'') is an external territory of Australia located in the Pacific Ocean between New Zealand and New Caledonia, directly east of Australia's Evans Head and about from Lord Howe Island. Together with ...

, and Lord Howe Island). 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 (New Guinea, the Philippines, the Santa Cruz Islands, the Solomon Islands, Sulawesi, Vanuatu) and eastern Australia (Queensland, New South Wales, Norfolk Island and Lord Howe Island). ''C. atrovirens'' subsp. ''boryanum'' is found further east, being native to New Guinea, the Bismarck Archipelago and islands of the western Pacific (the Caroline Islands, Fiji, the Mariana Islands, Samoa, Tonga, and Vanuatu). 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.

References

{{Taxonbar, from1=Q17041850, from2=Q17262734, from3=Q17264223, from4=Q17262855, from5=Q17259752, from6=Q17260840, from7=Q17259293, from8=Q15610504, from9=Q17257126, from10=Q38232288, from11=Q17262488, from12=Q17257913, from13=Q17260828, from14=Q17258492 Hymenophyllales Flora of the Ryukyu Islands Flora of the Philippines Flora of Sulawesi Flora of New Guinea Flora of the Bismarck Archipelago Flora of the Solomon Islands (archipelago) Flora of Fiji Flora of Samoa Flora of the Santa Cruz Islands Flora of Tonga Flora of Vanuatu Flora of the Mariana Islands Flora of Palau Flora of the Caroline Islands Flora of the Federated States of Micronesia Flora of Lord Howe Island Flora of New South Wales Flora of Norfolk Island Flora of Queensland