CYATHEA. 153 



CYATHEiE. J. Smith. 



With circular intramarginal sori, the sporangia usually sessile, 

 and situated on an elevated receptacle, and having a special 

 indusium. 



Comprising in Mr. Smith's "Catalogue of Ferns/' Cyathea, 

 Hemitelia, Alsophila, and Lophosoria, the latter genus being 

 included in Alsophila by Sir W. J. Hooker. 



GENUS I. 



CYATHEA. 



Habit erect and arborescent, the trunk or caudex reaching 

 in some species a height of from forty to fifty feet, the fronds 

 being from five to fifteen feet in length. 



Veins forked; venules free. Sori globose, axillary at the 

 forking of a vein, or medial. Receptacle elevated and columnar. 



Indusium globose, membranaceous, complete cup-shaped, and 

 at first covering the whole sorus. 



Inhabiting warm countries. 



Sir W. J. Hooker, in his "Species Filicum," describes — 



Sinuata, Hooker and Greville, 



Ceylon. 

 Brunonis, Wallich, Penang. 

 Mexicana, Schlechtendal, Mexico 

 Arborea, Smith, Jamaica. 

 Serra, Willdenow, Caraccas. 

 Imrayana, Hooker, Dominica. 

 Muricata, Willdenow, Martinique 

 Schanschin, Martins, Brazil. 

 Gardncri, Hooker, Brazil. 



Beyrichiana, Presl, Brazil. 

 Canaliculata, Willdenow, Isle of 



France. 

 Excelsa, Swartz, Bourbon. 

 Walkerae, Hooker, Ceylon. 

 Aspera, Swartz, Jamaica. 

 Aculeata, Willdenow, Hispaniola 

 Cuspidata, Kunze, Peru. 

 Divergens, Kunze, Peru. 

 Equestris, Kunze, Peru. 



VOL. VIII. Y 



