Growth-habit of T. lobbii but whole plant larger;
Asia-Tropical: Borneo present
Malesia: Borneo (known only from the type collection).
The irregular lobing of the frond apex and of distal parts of pinnae may indicate a hybrid origin, in which case T. lobbii is indicated as one parent, but there is no clear evidence of the other possible parent. Jacobs collected specimens of typical T. lobbii at a neighbouring locality.