GOMPENOIVM. XSXI 



GENUS 66. SYNGRAMMA. Veins mostly uniting 

 1 — 3 X 3t or near the margin, sometimes anas- 



Tribe IX. Grammitideae. Sori linear, short or long, 1 on 

 each side of tbe oosla, parallel to the latter or the 

 margin. Fronds not , articulate to the rhizome. 



GENUS 68. MONOGRAMMA, Sori costal, often pro- 

 tected by a lateral, raised outgrowth of leaf-tissue. 

 Fronds simple, grass-like; lateral veins mostly 

 wanting. 



GENUS 69. VITTARIA. Sori deeply immersed in 

 marginal or suimarginal grooves. Fronds simple or 

 forked, mostly grass-like ; lateral veins present, free. 



GENUS 70. TAENITIS. Sori not deeply immersed, 

 medial or submarginal. Fronds pinnate or simple, 

 but then not grass-like; lateral veins present, 

 anastomosing. 



Tribe X. Polypodieae. Sori round, ^ oblong or linear. Fronds 

 articulate to the rhizome. 



GENUS 71. POLYPODIUM. Sori round, oblong or linear, 

 several to numerous on each side, the oblong ones 

 parallel or oblique to the costa, the linear ones 

 oblique. Fronds uniform or dimorphous, simple 

 or divided, the barren ones never oakleaf-like ; 

 surfaces naked, scaly or hairy, if hairy the hairs 

 not stellately branched. 



GENUS 72. GYCLOPHORUS. Sori round or oblong, 

 several to numerous. Fronds as in genus 71, 



