﻿CdMPENDlUM. Xxix 



GENUS 54. ATHYRIUM. Like genus 53, but the sori 

 oblong, the higher never, the lower rarely double, 

 but not rarely hippocrepiform, hamato-recurvate 

 or subreniform. 



GENUS 55. ASPLENIUM. Stipes with 1, or 2 + 

 concave vascular strands mostly uniting towards 

 the apex of the stipe (or higher) into a single 

 tetrarchous one [ ) ( , )( , )-( , y< , X > \/, 

 \ / ]. Sori and indusia not in pairs; indusia 

 opening towards the midribs, occasionally towards 

 the margin. 



GENUS 56. PHYLLITIS. Like genus 55, but the sori 

 and indusia in opposite pairs, the indusia of each 

 pair opening towards each other. 



GENUS 57. TRIPHLEBIA. Like genus 56, but the 

 sori medial between the veins, i. e. 1 sorus to 

 each pair of indusia. 



Exindusiatae. Indusium wantiug, but the sori someti- 

 mes covered by the unaltered, recurved margin or placed 

 in dorsal or + marginal cavities or indusium-like depressions. 



Tribe VII. Phegopterideae. Sori punctiform, round or 

 oblong, rarely more than 2 X s^s long as broad, me- 

 dial or terminal on the veins and then sometimes 

 running into a submarginal line, if medial on the 

 veins then sometimes confluent in pairs. Stipes not 

 articulate to the rhizome. 



GENUS 58. NOTHOLAENA. Veins free. Sori round 

 or oblong, terminal, not rarely running into a sub- 

 marginal line. Fronds hairy or fibrillose. Spores 

 globoso-tetrahedral. 



GENUS 59. MONACHOSORUM. Veins free. Sori oblong, 



