86 34 



5. Scales of costæ entire or slightly toothed. Lamina often glanduloso- 

 pubescent. Veins 5 — 10-jugate. 



(5. Scales ovate, not bullale; sori siipramedial. Brazil and Guiana. 



32. D. falciciilata (Raddi) O. Ktze. 

 6. Scales of costæ 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. I.,arger species, generally dark-green. 



41. D. nigrovenia (Christ) C. Chr. 



7. Both surfaces (costa excepted) glabrous or glanduloso-pubescent. 



S. Veins reaching the margin. Lamina Ihin, 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-brow^n. 



43. Ü. strigilosa Dav. 

 8. Veins not reaching the margin. Scales bullate. Lamina 

 firm, dark-green. 

 9. Pinnæ pinnatifid only; segments shallowly serrate. 



44. D. Lindeni (Kuhn) O. Ktze. 

 9. Pinnæ pinnate in the lower part; segments or pinnules 

 entire, ligulate or deeply lobed with 2 — 3 obtuse, obli- 

 que lobes 4(i. D. lanceolata (Bak.) O. Ktze. 



5. Scales of costæ 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 — lö-jugate 33. D. c/e;?//« (Link) O. Ktze. 

 4. Scales of rachis reddish or yellowish, thin, hairlike or broad. Lamina 

 mostly light-green. 



5. Scales of rachis not many, hairlike. Sori medial or supramedial. 

 6. Costæ beneath without articulated hairs. Veins 10 15- jugate. 

 Indusium often absent. ... 34. D. submarginalis (L. & F.) C. Chr. 

 (5. Costæ beneath with articulated hairs among the scales. Veins 

 8-jugate. Indusium distinct .... 35. D. Karstenii (A. Br.) C. Chr. 

 5. 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 ciliés, their base flat. 



7. Scales with long ciliés along the margins. Veins 6 — 8-jugate. 



36. D. deflexa (Klf.) C. Chr. 



