Plants without flagelliform shoots. Thallose protonematal flaps narrowly linear-lanceolate acute, occasionally with a short mucronate point, margins usually entire, up to 2.5 mm. Leaves with costa weak or sometimes absent, present only in distal leaves. Spores about 10–12 µm.

Distribution

• Generated Map
• Legacy Map

North America, Eurasia.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Lower Taxa

Tetrodontium brownianum var. brownianum, Tetrodontium brownianum var. ovatum

Key

1	Protonematal flaps narrow, linear, acute, to 2.5 mm, usually entire, sometimes with a short mucronate point; stem leaves acuminate, sharply pointed	Tetrodontium brownianum var. brownianum
1	Protonematal flaps ovate-lingulate, less than 0.5 mm, dentate, with a large acute apical cell, often mixed in with linear, mucronate flaps; stem leaves obtuse	Tetrodontium brownianum var. ovatum