⚠ Version 1 of The Plant List has been superseded.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 Thamnium undulatum in version 1.1 of The Plant List.
This name is a synonym of Porotrichum korthalsianum .
The record derives from Tropicos which reports it as a synonym (record 35105326
) with original publication details: Nat. Pflanzenfam. I(3): 862 862 1906.