﻿FILICES (Ferns). 



JLffitngement of the families. 



a. CLASS I. r»L^^I>fITHA.LLOS^^JE. Prothallium 

 green, flat or filiform, entire, incised or branched, epigeous or 

 epiphytical, adpressed to the substratum. Diels, in Engl. & Prantl, 

 Nat. Pfl. Fam., F, fig. 11. 



b. SERIES I. ANNULATAE. Sporangia with a ring consisting of 

 a close or broken row or a group of conspicuously prominent, 

 thickened cells. 



FAMILY I. Cyatlseacea^e. Ring complete, oblique, subvertical, 

 sometimes interrupted by a group of depressed, transversally oblong cells, 

 which are however distinctly difierentiated from the other cells of the spo- 

 rangium. Sori globose or oblong, consisting of numerous, densely crowded 

 sporangia; indusium wanting or present, but then neither umbrella-shaped 

 nor linear. Arborescent ferns. Diels 1. c, fig. 82, D; Hk. Bk., Syn. Fil., 

 tab. I, fig. 4—6. 



FAMILY 11. Matonmceae. Ring as in Cyatheaceae but never in- 

 terrupted. Sori consisting of 4—8 sporangia placed in a whorl; indusium 

 umbrella-shaped. No arborescent ferns. Diels, 1. c, fig. 181 k 182, B; 

 Hk. Bk., 1. c, fig. 8. 



FAMILY III. 01eielieia§a«eae. Ring complete, + horizontal, sur- 

 rounding the sporangium like a belt. Sori dorsal, consisting of 2 — 12 sporangia, 

 mostly placed in a whorl; indusium wanting; receptacle dot-like Diels, 1. c , 

 fig. 186; Hk. Bk., 1. c, fig. 2. 



FAMILY IV. HyaneiBoplsyliaceae. Ring as in Gleicheniaceae. 

 Sori marginal, consisting of numerous sporangia crowded around an erected, 

 oblong, cuneate, capitate, malleiform or columnar-filiform receptacle; indusium 

 present. Diels, L c, fig. 72 & 75, D; Hk. Bk., 1. c, tab. JI, fig. 16—17. 



