CHARACTERS OP TRIBES AND GENERA. 251 



lllust. Hook, and Bauer. Gen. Fil., t. 34 ; Schott. Gen. 

 Fil., t. 5 ; Moore Ind. Fil., p. 93 B ; J. Sm. Ferns 

 Brit, and For., fig. 134. 



OBS. The fronds being articulate with the caudex, and 

 the pinnae and pinnules articulate with the rachis, as also the 

 sori being confluent in a transverse broad line, between the 

 costa and the margin of the pinnules, marks this as a genus 

 distinct from Alsophila. The arborescent stem and the 

 articulated character of the fronds, being similar to several 

 species of Cyafhea as already noticed, gives it a claim to 

 rank in the present tribe. 



Sp. T. excelsa (Pr.) (Alsophila Tcenitis, Hook. Sp. Fil., 

 Mart. Plor. Bras., t. 37 ; Badd. Fil. Bras., t. 40) (v v.) ; 

 T. elegans (Pr.) (Mart. Flora. Bras., t. 38.) 



OBS. In some specimens of T. elegans the line of sori is 

 not so complete as in T. excelsa. 



134. LOPHOSORIA, Presl. (1847.) 

 Alsophila, sp., Hook. Sp. Fil. 



Vernation fasciculate, erect, arborescent, 6 to 8 feet high, 

 densely laniferous. Fronds 3 or more feet in length, com- 

 pound multifid, glaucous beneath. Veins simple or forked, 

 venules free, their apices clavate. Receptacles small (not 

 elevated), sub-terminal. Sori punctiform, solitary on the 

 ultimate dents or lacinae, criniferous. 



Type. Polypodium pruinatum, Sw. 



lllust. Schk. Fil., t. 25 B. / J. Sm., Ferns, Brit, and 

 For., fig. 135. 



OBS. The Fern on which this genus is founded is a 

 native of Jamaica, Mexico, extending through tropical 

 America, to Chili and the Island of Juan Fernandez. It 

 was early described by Swartz under the name of Polypo- 



