Japanobotrychum

Japanobotrychum is a genus of ferns in the family Ophioglossaceae with the sole species Japanobotrychum lanuginosum.[1] The genus is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I) (under the name "Japanobotrychium"),[2] but not by some other sources.

Japanobotrychum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Class:	Polypodiopsida
Order:	Ophioglossales
Family:	Ophioglossaceae
Genus:	Japanobotrychum Masam.[1]
Species:	J. lanuginosum
Binomial name
Japanobotrychum lanuginosum (Wall. ex Hook. & Grev.) M.Nishida ex Tagawa[1]
Synonyms[1]
Botrychium arisanense (Masam.) Masam. Botrychium decurrens Ching Botrychium lanuginosum Wall. ex Hook. & Grev. Botrychium leptostachyum Hayata Botrychium modestum Ching Botrychium parvum Ching Botrychium virginianum var. lanuginosum (Wall. ex Hook. & Grev.) T.Moore Botrychium yunnanense Ching Botrypus decurrens (Ching) Ching & H.S.Kung Botrypus lanuginosus (Wall. ex Hook. & Grev.) Holub Botrypus parvus (Ching) Holttum Botrypus tibeticus Ching Botrypus yunnanensis (Ching) Y.X.Lin Botrypus yunnanensis (Ching) Z.R.He Japanobotrychum arisanense Masam. Japanobotrychum lanuginosum var. nepalense Nishida Osmundopteris lanuginosa (Wall.ex Hook.& Grev.) Nishida

Taxonomy

The genus Japanobotrychum was first described in 1931 by the Japanese botanist Genkei Masamune, with the only species being Japanobotrychum arisanense.[3] This is now considered to be a synonym of Botrychium lanuginosum Wall. ex Hook. & Grev., first described in 1828,[1] so the epithet lanuginosum has priority over arisanense. The Pteridophyte Phylogeny Group classification of 2016 (PPG I) accepts the genus (with the spelling "Japanobotrychium"), with one species,[2] as did the Checklist of Ferns and Lycophytes of the World as of October 2019,[1] whereas Plants of the World Online subsumed the genus into Botrychium.[4]

Distribution

Japanobotrychum lanuginosum is widely distributed, mainly in tropical Asia, being found from West Himalaya and India through southern China and Mainland Southeast Asia to New Guinea.[5]

References

1. Hassler, Michael & Schmitt, Bernd (August 2019), "Japanobotrychum", Checklist of Ferns and Lycophytes of the World, 8.02, retrieved 2019-10-13
2. PPG I (2016), "A community-derived classification for extant lycophytes and ferns", Journal of Systematics and Evolution, 54 (6): 563–603, doi:10.1111/jse.12229
3. "IPNI search for 'Japanobotrychum' and 'Massam.'", The International Plant Names Index, retrieved 2019-10-13
4. "Japanobotrychum Masam.", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-10-13
5. "Botrychium lanuginosum", Plants of the World Online, Royal Botanic Gardens, Kew, retrieved 2019-10-13