127 
11. Largest pinnz up to 30 cm long, often 
pendent, rather densely hairy by shorter 
hairs and longer patent *strigg" on the 
coste beneath; segments patent separated 
by broad sinuses. Receptacle with long 
hairs......... 160. D. piloso-hispida (Hook.) C. Chr. 
7. Costee 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. Pinne 10—15 cm long, scarcely 2 cm broad; 
coste beneath with numerous long, pluri- 
cellnlarsbairs c CE 168. D. mertensioides C. Chr. 
10. Pinnz up to 30 cm long, 3—4 em 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. 
Coste beneath with several large, light-brown 
Scales crei vr EIE 165. D. Ruiziana (Kl.) C. Chr. 
10. Segments from a broad base tapering to the 
acute point, the lower basal one not or a little 
reduced. Coste beneath very sparsely scaly 
170. D. multiformis n. sp. 
8. Stipe, especially below, with a dense mass of woolly 
VATS it scacie sace doe ses eee 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. 
J-Sesmentistereuates UE 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 D. rudis. 
"E SoutlsBrazili:- 4 5e ce ae dec ete 157. D. Heineri C. Chr. 
unicellular. 
4. Lamina rigidly coriaceous, quite glabrous 151. D. semilunata (Sod.) C. Chr. 
4. Lamina herbaceous or membranous, at least the costze pubescent. 
5. Only the basal segments free......... 161. D. euchlora (Sod.) C. Chr. 
5. Several free pinnules. 
6. Pinnulz (and segments) about 2 cm long, 2—3 mm broad, 
finely pubescent throughout, grass-green, herbaceous. Veins 
Sip Chee ey Ne Ais cede sro ad Bonüpdritu Hos. 
6. Pinnule 3—5 cm long, '/2 em broad, often deeply lobed, 
membranous, dark-green. Veins furcate. 
117: 
