Orderb | Family | Number of sequences | tRNA genec |
Cyatheales (tree ferns) | Cyatheaceae | 140 | trnR-UCG |
 | Dicksoniaceae | 6 | trnR-UCG |
 | Lophosoriaceae | 1 | trnR-UCG |
 | Hymenophyllopsidaceae | 1 | trnR-UCG |
Gleicheniales | Dipteridaceae | 1 | trnR-CCG |
 | Gleicheniaceae | 2 | trnR-CCG |
Hymenophyllales | Hymenophyllaceae | 84 | trnR-CCG |
Osmundales | Osmundaceae | 18 | trnR-CCG |
Marattiales | Marattiaceae | 1 | trnR-CCG |
Psilotales | Psilotaceae | 1 | trnR-CCG |
Ophioglossales | Ophioglossaceae | 1 | trnR-CCG |