COMPENDIUM. XXI 



Tribe I. Cyatheae. Ring not depressed at the place of 

 the stomiuiD. Sori globose, dorsal on the veins. 



GENUS 1. CYATHEA. Indusium globose, at least when 

 young, at length cup-shaped, entire, laciniale or 

 evanished. 



GENUS 2. HEMITELIA. Indusium consisting of a rather 

 large, convex, inferior scale attached at the inner 

 side of the sorus. 



GENUS 3. ALSOPHILA. Indusium wanting, or con- 

 sisting of a minute, inferior scale or a whorl of 

 hairs or fibres. 



Tribe II. Dicksonieae. Ring depressed at the place of the 

 stomium. Sori roundish or suboblong, terminal on 

 the veins. 



GENUS 4. DICKSONIA. Indusium cucullate, 2-valved, the 

 outer valve consisting of a small lobe of the frond. 



GENUS 5. CIBOTIUM. Indusium subeucuUate, 2-valved, 

 the outer valve differentiated from the margin of 

 the frond. 



FAMILY II. MATONIACEAE. Ring complete, subvertical. S^ri round. 

 Indusium umbrella-shaped. Caudex not arborescent. 



GENUS 6. MATONIA. Characters of the family. 



FAMILY Hi. GLEICHENIACEAE. Ring complete, horizontal, sur- 

 rounding the sporangium like a belt. Sori roundish, dorsal on 

 the vein*. Indusium wanting. 



GENUS 7. GLEICHENIA. Characters of the family. . 



FAMILY IV. HYMENOPHYLLACEAE. Ring complete, + horizontal, 

 surrounding the compressed sporangium like a belt. Sori ter- 

 minal on the veins. Indusium present. 



