Lomariopsis

Climbing ferns. Rhizome long, winding, branched, fleshy; rhizome scales narrow to very broad, dark. Stipe not articulated. Fronds dimorphous, pinnate, with articulated pinnae, except for the terminal one. Sterila pinnae oblong to narrowly lanceolate, fertile pinnae narrowly linear and underside covered entirely with sporangia. Rhachises glabrous or scaly. Veins simple or forked, parallel, free, ending in or near the margin.

Lomariopsis is the type genus of the fern family Lomariopsidaceae.

One economically important species exists only as an aquatic gametophyte form, commonly known as süsswassertang. This species is closely allied to Lomariopsis lineata but has not yet been named as a species.