Psilotum

Plants terrestrial, sometimes epiphytic. Aerial shoots often clumped, simple proximally, dichotomously branched distally, 3(–several)-ridged. Appendages minute, bractlike, borne distally on ridges of aerial shoots, sterile appendages subulate, those subtending synangia 2-lobed. Synangia ± globose, obscurely 3-lobed.

Distribution

Tropical and warm temperate regions.

Discussion

Species 2 or 3 (1 in the flora).

Selected References

Cooper-Driver,G. 1977. Chemical evidence for separating the Psilotaceae from the Filicales. Science 198: 1260--1262.

White, R.A., D.W. Bierhorst, P.G. Gensel, D.R. Kaplan, and W.H. Wagner Jr. 1977. Taxonomic and morphological relationships of the Psilotaceae: A symposium. Brittonia 29: 1--68.

Lower Taxa

Psilotum nudum