124 72 



4. Basal sori oblong or linear, the upper ones roundish, oblong 

 or linear. 

 5. Lamina gradually narrowed downwards. 



6. Basal veins running to the sinus. Reduced pinnæ few. 



Veins 6— 7-jugate 124. D. diplazioides (Desv.) Urban. 



6. Basal veins running to the margin above sinus. Reduced 

 pinnæ several. Veins 10— 15-jugate. 



7. Veins immersed, 10 — 12-jugate. Leaf throughout shortly 

 pubescent, 50—60 cm long. Sori medial , oblong- 

 linear 125. D. consimilis (Fée) C. Chr. 



7. Veins raised above, 10— 15-jugate. Leaf sparsely pubes- 

 cent by longer hairs, 80—100 cm long. Sori supra- 

 medial, roundish or oblong... 126. D. heteroclita (Desv.) C. Chr. 

 5. Lamina downwards abruptly narrowed. 



6. Lamina finely puberulous throughout. Sori exindusiate 



127. D. atrovirens C. Chr. 

 6. Lamina glabrous between the veins. Indusium small. 



128. D. leptogrammoides Ros. 

 2. Rhizome wide-creeping with distant stipites. Veins not rarely furcate. 

 3. Lamina coriaceous. Reduced pinnæ none or 1 — 2-jugate. 



4. Sporangia setose. Jamaica 129. Ü. firma (Jenm.) C. Chr. 



4. Sporangia glabrous. Andes 130. D. Pavoniana (Kl.) C. Chr. 



3. Lamina herbaceous or membranous. Sporangia glabrous. 

 4. Lower 3 — 8 pairs of pinnæ reduced. 



5. Rachis and costæ beneath sparsely scaly. Andine species 



131. Ü. Rosenstockii C. Chr. 

 5. Rachis and costæ without scales. South-Brazilian species. 

 6. Leaf-tissue glabrous. 



7. Pinnæ up to 8 cm long, scarcely narrowed towards 



their base 132. I). Santa Catharinae Ros. 



7. Pinnæ up to 18 cm long; narrowed gradually towards 



their base 133. Ü. Jürgensii (Ros.) C. Chr. 



6. Leaf-tissue beneath pubescent. 



7. Lamina abruptly narrowed downwards. . 134. D. Mosenii C. Chr. 

 7. Lamina gradually narrowed downwards. 



8. Pinnæ deltoideo-oblong. Veins often furcate 



135. I), riviilarioides (Fée) C. Chr. 

 8. Pinnæ linear-lanceolate. Veins simple . . 136. D. scariosa Ros. 

 4. Lower pinnæ not reduced at least not auriculiform. Most 

 veins furcate. Lower segments of larger pinnæ quite free. 



Veins simple 137. Ü. tremula Christ. 



1. Veins 12— 25-jugate, generally close. 



2. Lamina bipinnatifid; no segments free. 

 3. Sporangia glabrous. 



4. Argentine and South-Brazilian species. 



5. Aërophore none. Rhizome creeping. Costæ more or less 

 pilose. 



6. Veins 14 — 16-jugate, pellucid. Lamina thinly herbace- 

 ous 138. Ü. siambonensis (Hieron.) C. Chr. 



6. Veins 16 — 18-jugate. Lamina firm 



139. Ü. achalensis (Hieron.) C. Chr. 

 5. Aërophore present. Rhizome erect. Lamina with some few 

 scattered long hairs or perfectly glabrous. 



