﻿JiXXli COMPENDIUM. 



but simple; at least the under surface always 

 more or less hairy, the hairs stellately branched. 



GENUS 75. DRYNARIA. Sori round, many or nume- 

 rous. Fronds dimorphous. Barren fronds (cup- 

 leaves) oakleaf-like, sessile, humus-collecling, fertile 

 ones pinnatifid or pinnate, stipitate. 



GENUS 74. DRYOSTACHYUM. Sori oblong or sub- 

 quadrangular, many. Fronds pinnatifid, the higher 

 segments fertile, much contracted. Barren fronds 

 not oakleaf-like. 



GENUS 75. DRYMOGLOSSUM. Sori linear, 1 on each 

 side, parallel to the costa or the margin. Barren 

 fronds roundish or oblong, fertile ones linear or 

 linear-oblong. 



GENUS 76. CHRISTOPTERIS. Sori linear, 1 on each 

 side, parallel to the costa. Barren fronds sagit- 

 tate, fertile ones 3-partite. 



Tribe XI. Acrostiche^e. Sori indefinite, i.e. quite covering 

 portions of the under surface or occasionally both sur- 

 faces of the fertile segments at full maturity, but ap- 

 parently linear in the forms with much contracted 

 fertile segments. 



GENUS 77. PLATYCERIUM. Distinguished from the 

 following genera by the dichotomously branched fer- 

 tile fronds. Barren (basal) fronds adpressed to 

 the substratum, humus-collecting. 



GENUS 78. ELAPHOGLOSSUM. Veins free, the apices 

 not rarely united by a ± marginal, cartilagineous 

 or decoloured line. Fronds simple. 



GENUS 79. STENOCHLAENA. Veins free, those of 

 the fertile fronds united at the base by a + 



