Tetraphis pellucida


Sp. Musc. Frond., 45, plate 7, fig. 1a–f. 1801,.

Synonyms: Georgia pellucida (Hedwig) Rabenhorst Tetraphis cuspidata (Kindberg) Paris
Treatment appears in FNA Volume 27. Treatment on page 112. Mentioned on page 113.

Specialized asexual structures are usually present. Seta 6–14 mm, erect, straight or ± flexuose, superficial cells smooth and spirally twisted the entire length or spirally twisted and interspersed with sections of prorulate straight cells. Spores 10–13 µm.


V27 128-distribution-map.gif

Throughout Northern Hemisphere


Varieties 2 (2 in the flora).

Using growth studies, R. T. T. Forman (1962) suggested that leaf width and shape are influenced by temperature but could be used for species determination in some areas of North America, although it appears to be an inconsistent character and should be used with caution to determine sterile material. The varieties are distinguished by twisting of the superficial cells of the seta in both old, dry, and young, fresh material; the seta itself is twisted when dry.

Selected References



1 Seta smooth, superficial cells spirally twisted throughout entire length Tetraphis pellucida var. pellucida
1 Seta usually lightly papillose near base, superficial cells spirally twisted but interspersed with sections of straight cell Tetraphis pellucida var. trachypoda