the root (no rank)
Eukaryota (domain)
Viridiplantae (kingdom)
Embryophyta (phylum)
Psilotophyta (subphylum)
Psilotopsida (class)
Psilotales (order)
Psilotaceae (family)
[hide inferior taxa]
Psilotum nudum (species)
Psilotum triquetrum (species)