⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Porella caespitans in version 1.1 of The Plant List.
This name is a synonym of Porella setigera var. nipponica .
The record derives from Tropicos which reports it as a synonym (record 35202074
) with original publication details: J. Hattori Bot. Lab. 33: 57. f. 8: 8--19, 11: a--h, 12: a--n, a3: a--o 57 1970.