Fig. 4.

Sori of major fern lineages. (A) Equisetales, Equisetum telmateia Ehrh. (B) Ophioglossales, Botrychium virginianum (L.) Sw. (C) Psilotales, Psilotum nudum (L.) P.Beauv. (D) Marattiales, Marattia cicutifolia Kaulf. (E) Osmundales, Todea barbara T.Moore. (F) Hymenophyllales, Trichomanes cupressoides Desv. (G) Gleicheniales, Dicranopteris linearis (Burm.f.) Underw. (H) Schizaeales, Lygodium volubile Sw. (I) Salviniales, Marsilea drummondii A.Braun. (J) Cyatheales, Alsophila dealbata (G.Forst.) C.Presl. (K) Polypodiales, Dennstaedtia punctilobula (Michx.) T.Moore. (L) Pteris usambarensis Hieron. (M) Eupolypods, Asplenium caudatum G.Forst. (N) Dryopteris sieboldii (T.Moore) Kunze.