FILICES. 591 
4. @leichenia (Mertensia) revoluta, H.B.K.; Hook. Sp. Fil. i. p.7, t.7 4; 
Hook. et Bak. Syn. Fil. p. 13; Bak. in Journ. Bot. 1884, p. 362. 
Costa Rica (Harrison).—Jamaica to Ecuapor and Brazit. Hb. Kew. 
Species dubie vel non vise. 
Mertensia gleichenioides, Liebm. Mexicos Bregner, p. 144.—Cuapa, Vera 
Cruz at 2500 to 3000 feet. 
Gleichenia hermanni, R. Br. ex Ch. et Schl. in Linnea, v. p. 620.—MExico. 
Gleichenia nitida et G. tenuis, Presl, Relig. Henk. i. p. 70.—MzExico. 
Mertensia sartorii, et M. schaffneri, Fée 9° Mém. Foug. pp. 31 et 32.— 
MEXICO. 
Suborder II. POLYPODIACEZ. 
. As understood by Hooker and Baker this includes fifty-seven genera referred to 
thirteen tribes. 
Tribe I. CYATHE AL. 
There are eight genera of this tribe, which consists almost exclusively of arboreous 
species, inhabiting the tropics and south temperate regions. 
2. CYATHEA. 
Cyathea, Smith ; Hook. et Bak. Syn. Fil. p. 16, et ed. 2, p. 450, t. 1. fig. 4. 
Eighty species, mostly inhabiting the torrid zone, one reaching Japan, and several 
endemic.in New Zealand and South Australia. 
1. Cyathea arborea, Sm.; Hook. et Bak. Syn. Fil. p. 16; Hook. Sp. Fil. i. 
p. 1%. 
Cyathea glauca, Fourn. Mex. Pl. Enum. i. p. 135. - 
Sovra Mexico, Orizaba (Bourgeau, 2794).—West Inpies; Brazit. Hb. Kew. 
2. Cyathea insignis, Eaton in Mem. Amer. Acad. Sc. n.s. viii. p. 215, ex 
Baker in Gard. Chron. 1873, p. 776; Hook. et Bak. Syn. Fil. p. 17. 
Cyathea bourgei, Fourn. Mex. Pl. Enum. i. p. 135. 
‘Cyathea princeps, J. Sm. Ferns Brit. & For. p. 291. 
SoutH Mzxico, valley of Cordova (Bourgeau, 2200); GuatemaLa, Coban and moun- 
tain forests, Vera Paz (Godman & Salvin, 376).—CoutomBia; Ecuapor; Cupa. Hb. 
Kew. 
3. Cyathea jurgensenii, Fourn. Mex. Pl. Enum. i. p. 135, 
South Mexico, Sierra San Pedro Nolasco, &. (Jurgensen, 874). Hb. Kew. 
