FlLICES. 



COMPENDIUM. XXXlil 



costal strand. Fronds pinnate, Loniaria-llke. Rhi- 

 zome high-scandent. 



GENUS 80. P0LYI30TRYA. Veins free, not united at 

 the hase in the fertile fronds. Fronds pinnately 

 divided, not Loniaria-like. Rhizome erect or wide- 

 creeping, not high-scandent. Sori often occupying 

 the apices of the veins only when young. 



GENUS 81. STENOSEMIA. Veins anastomosing, form- 

 ing costal and costular arches, otherwise free. 

 Barren fronds ternate or pinnate, fertile ones con- 

 spicuously contracted, branched. 



GENUS 82. HYMENOLEPIS. Veins anastomosing co- 

 piously. Fronds simple, the soriferous apex nar- 

 rowly linear or spoon-shaped. 



GENUS 83. ACROSTICHUM. Veins anastomosing co- 

 piously. Fronds pinnate; pinnae not articulate 

 to the rachis, the higher ons fertile, rarely much 

 contrated. 



GENUS 84. PHOTINOPTERIS. Veins anastomosing 

 copiously. Fronds pinnatifid or pinnate; segments 

 articulate to the rachis, the higher ones fertile, 

 always much contracted. 



GENUS 85. CHEIROl'LEURIA. Veins anastomosing co- 

 piously. Fronds dimorphous, the barren ones 

 simple or more commonly, 2-fid, with the segments 

 sometimes 2-fid again, each segment with 2 or 

 more stout, longitudinal ribs. Fertile fronds simple, 

 narrowly linear. 



GENUS 80(1. LEPTOCHILUS. Veins anastomosing co- 

 piously. Fronds dimorphous, simple, 3-fid or pin- 

 nate, each segments with a single/'central rib. 

 Spores oblong, ovate or bilateral. 



