116 64 



10. Segments short, obtuse; veins 3 — 7 to a side. 



11. Pinnæ obtuse 65. D. coarctata (Kze.) C. Chr. 



11. Pinnæ acuminate. 



12. Lamina glabrous or hairy on the rachis 

 and costæ only. 

 13. Sori medial. Under surface slightly 



or not glandular .... 64. I), riopardensis Ros. 

 13. Sori near the margin. Under sur- 

 face densely glandulose. 

 14. Pinnæ close; segments entire, the 

 basal ones not auricled 



63. D. opposita (Vahl) Urb. 

 14. Pinnæ distant; segments toothed 

 at the apex, the basal ones with 

 an interne auricle 

 59. D. consanguinea var. aequalis C. Chr. 

 12. Lamina more or less hairy on the sur- 

 faces. 



13. Under surface glandular. Pinnæ 

 auricled at the upper base 



65. D. coarctata (Kze.) C. Chr. 

 13. Under surface not glandular. Pinnæ 

 not auricled, shortly pubescent 

 throughout; indusium very pilose 



66. D. leiicothrix C. Chr. 

 10. Segments long, linear, falcate or very oblique; 

 veins 7 — 9-jugate. 



11. Lamina downwards gradually narrowed. 

 12. Under surface glandular 



67. D. panamensis (Pr.) C. Chr. 

 12. Under surface not glandular 



144. D. scalaris (Christ) C. Chr. 

 11. Lamina downwards abruptly narrowed, 



eglandulose 68. D. siluiensis Hieron. 



7. Veins prominent above, occasionally furcate. Lamina 

 chartaceous or coriaceous. 

 8. Lamina chartaceous or membranous, nearly glabrous; 



pinnæ as a rule unequal-sided 59. D. consanguinea (Fée) C. Chr. 

 8. Lamina coriaceous, hairy on the ribs; pinnæ scarcely 



unequal-sided 69. D- scalpturoides (Fée) C. Chr. 



4. Lamina towards the base shortly attenuate with 1—4 pairs of 

 reduced pinnæ (type I), or, in some species, without auriculi- 

 form pinnæ. Basal segments equal or shorter than the others, 

 seldom a little longer. Middle-sized species. 

 5. All pinnæ sessile. Sori round. 



6. Rachis (and costæ beneath) without scales , at least the 

 scales are very few and deciduous. 



7. Sporangia setose. Indusium absent or rarely found. 

 8. Rachis and costæ beneath densely pulverulent by 

 very short hairs, long hairs absent 



70. D. concinna (Willd.) O. Ktze. 

 8. Rachis and costæ beneath sparsely pubescent by 

 longer hairs. 



