CLASSIFICATION 
63 
Genus 30. Cheilanthes. Indusium roundish, not continuous 
but more or less confluent, formed of the edge of 
the frond which is only partly turned back. Sori 
abundant — often crowded all round the edge of 
the frond except at the sinus. 
Genus 31. Hypolepis . Indusium membranous in texture, 
small, round, equal. Sori in the hollow between 
two lobes, or on the opposite edge of the frond ; 
sometimes also scattered along the edge. Veins 
free. 
C. Adiantinae. Capsules produced on the under-side of 
the indusium, which varies from kidney-shaped to 
long, and is produced on the points of the pinnules. 
Genus 32. Adiantum. Characters as above. 
D. Pteridinae. Sori in the axil of the reflexed margin 
which forms the indusium. 
Genus 33. Actiniopleris. Frond flabellate, with linear 
segments. 
Genus 34. Pteris. Indusium continuous. Veins free or 
nearly so. 
Genus 35. Lonchitis. Sori in the hollow between two 
lobes, reniform, or oblong, covered by the indusium ; 
veins anastomosing. 
Genus 36. Histiopteiis. Indusium continuous ; veins ana- 
stomosing freely, without free included veinlets. 
Genus 37. Pteridium. Indusium sometimes double ; veins 
free. 
******* Vittarieae. Fronds simple and grass-like ; veins and 
sori parallel to the midrib. 
Genus 38. Monogrcimma. Sori linear, near the midrib ; 
frond simple, with one vein only. 
Genus 39. Vittaria. Sori in long lines near the margin ; 
fronds simple, grass-like, with several veins. 
******** Polypodieae. F ronds usually jointed to the rhizome ; 
sori round or oblong, scattered, without indusium. 
Genus 40. Polypodium. Sori separate, scattered or regular. 
Genus 41. Cyclophorus. Sori numerous, densely placed all 
over the upper part of the frond, and nearly covered 
by the stellate tomentum. 
