75 127 



11. Largest pinnæ up to 30 cm long, often 

 pendent, rather densely hairy by shorter 

 hairs and longer patent "strigæ" on the 

 costæ beneath; segments patent separated 

 by broad sinuses. Receptacle with long 



hairs UiO. D. piloso-hispida (Hook.) C. Chr. 



7. Costæ beneath patently and softly hairy by long pluri- 

 cellular hairs. 

 8. Stipe glabrous or shortly pubescent. 



9. Basal segments not auricled, sori close to the edge. 



10. Pinnæ 10—15 cm long, scarcely 2 cm broad; 



costæ beneath with numerous long, pluri- 



cellular hairs 168. D. mertensioides C. Chr. 



10. Pinnæ up to 30 cm long, 3 — 4 cm broad; hairs 

 shorter, seldom pluricellular 



160. D. piloso-hispida (Hk.) C. Chr. 

 9. Basal segments with an auricle at the inner side. 

 Sori about medial. 



10. Segments linear-falcate with revolute margins, 

 obtuse, the basal ones considerably reduced. 

 Costæ beneath with several large, light-brown 



scales 165. Ü. Ruizinna (Kl.) C. Chr. 



10. Segments from a broad base tapering to the 

 acute point, the lower basal one not or a little 

 reduced. Costæ beneath very sparsely scaly 



170. D. iniiltiformis n. sp. 

 8. Stipe, especially below, with a dense mass of woolly 



hairs 166. D. lanipes C. Chr. 



6. Sori, at least the upper ones, covered by the revolute 

 margins of the segment. Basal segments not or a little 

 reduced, the lower one often prolongated. 



7. Segments crenate 167. D. horrens Hieron. 



7. Segments entire. 



8. Margins densely ciliate; lower basal segment not 



prolongated and not auricled . . . 168. D. mertensioides C. Chr. 

 8. Margins scarcely ciliate; lower basal segment always 

 prolongated and auricled at the inner side 



169. D. cheilanthoides (Kze.) C. Chr. 

 3. Sporangia setose. Species closely allied to Ü. rudis. 



4. South Brazil 157. D. Heineri C. Chr. 



4. Peru 156. D. peruviana Bos. 



2. Lamina bipinnate or the lower segments of the larger pinnæ quite free. 



3. Basal segments or pinnules much reduced, not auricled. Hairs 

 unicellular. 



4. Lamina rigidlj' coriaceous, quite glabrous 151. 1). semiliinaia (Sod.) C. Chr. 

 4. Lamina herbaceous or membranous, at least the costæ pubescent. 



5. Only the basal segments free 161. D. eiichlora (Sod.) C. Chr. 



5. Several free pinnules. 



6. Pinnulæ (and segments) about 2 cm long, 2=3 mm broad, 

 finely pubescent throughout, grass-green, herbaceous. Veins 



simple 145. I). Bonapartii Bos. 



6. Pinnulæ 3 — 5 cm long, '-• cm broad, often deeply lobed, 

 membranous, dark-green. Veins furcate. 



17* 



