86 
a 
34 
Scales of cost: entire or slightly toothed. Lamina often glanduloso- 
pubescent. Veins 5—10-jugate. 
6. Scales ovate, not bullate; sori supramedial. Brazil and Guiana. 
32. D. falciculata (Raddi) O. Ktze. 
6. Scales of coste from a broad, generally bullate base abruptly 
narrowed into a short, narrow apex. Central American and 
Andine species. 
7. Both surfaces with scattered short, thick hairs, not glanduloso- 
pubescent. Larger species, generally dark-green. 
41. D. nigrovenia (Christ) C. Chr. 
7. Both surfaces (costa excepted) glabrous or glanduloso-pubescent. 
8. Veins reaching the margin. Lamina thin, light-green. 
9. Lamina glabrous; scales of stipe and rachis rather thin, 
from a broad base narrowed into a hair-like apex. 
42. D. Tonduzii (Christ) C. Chr. 
9. Lamina densely glanduloso-pubescent throughout; scales 
of stipe and rachis very narrow, black-brown. 
43. D. strigilosa Dav. 
8. Veins not reaching the margin. Scales bullate. Lamina 
firm, dark-green. 
9. Pinnze pinnatifid only; segments shallowly serrate. 
44. D. Lindeni (Kuhn) O. Ktze. 
9. Pinnz pinnate in the lower part; segments or pinnules 
entire, ligulate or deeply lobed with 2—3 obtuse, obli- 
queslobesr- 5 3: 295 46. D. lanceolata (Bak.) O. Ktze. 
Scales of coste lanceolate with claw-shaped teeth. Veins 10—15- 
jugate. Lamina not glanduloso-pubescent, dark-green. 
6. Sori medial or supramedial. Veins 10—11-jugate. 
32. D. falciculata var. paranaensis C. Chr. 
6. Sori inframedial. Veins 12—15-jugate 33. D. ctenitis (Link) O. Ktze. 
4. Seales of rachis reddish or yellowish, thin, hairlike or broad. Lamina 
mostly light-green. 
9. 
Scales of rachis not many, hairlike. Sori medial or supramedial. 
6. Coste beneath without articulated hairs. Veins 10—15-jugate. 
Indusium often absent.... 34. D. submarginalis (L. & F.) C. Chr. 
6. Coste beneath with articulated hairs among the scales. Veins 
8-jugate. Indusium distinct.... 35. D. Karstenii (A. Br.) C. Chr. 
Rachis densely scaly by broad, reddish or dirty-brown scales. Sori 
medial or inframedial; indusium in most species persistent. 
6. Scales toothed or fringed by long cilies, their base flat. 
7. Scales with long cilies along the margins. Veins 6—8-jugate. 
36. D. deflexa (KIf.) C. Chr. 
