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FNA | Family List | FNA Vol. 27 | Tetraphidaceae | Tetrodontium

2. Tetrodontium brownianum (Dickson) Schwägrichen, Sp. Musc. Frond. Suppl. 2(1,2): 102. 1824.

Georgia browniana (Dickson) Müller Hal.; Tetraphis browniana (Dickson) Greville

Plants without flagelliform shoots. Thallose protonematal flaps narrowly linear-lanceolate acute, occasionally with a short mucro-nate 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.

Varieties 2 (2 in the flora): North America, Eurasia.

1 Protonematal flaps narrow, linear, acute, to 2.5 mm, usually entire, sometimes with a short mucronate point; stem leaves acuminate, sharply pointed   2a Tetrodontium brownianum var. brownianum
+ 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   2b Tetrodontium brownianum var. ovatum

Lower Taxa


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