73 12; 
Or 
6. Margins of segments revolute covering the sori. Lamina 
coriaceous, glandular beneath. Veins simple. Lower basal 
segments prolongated......... 169. D. cheilanthoides (Kze.) C. Chr. 
6. Margins plane. Lamina membranous, eglandulose. Veins 
often furcate. Lower basal segments not prolongated 
162. D. Glaziovii (Christ. C. Chr. 
4. West Indian and Andine species. 
5. Lamina herbaceous or membranous; margins plane or 
slightly revolute. 
6. Rachis not or very slightly scaly. 
7. Segments entire or inconspicuously toothed, the basal 
ones without auricles. 
8. Rachis glabrous or with few, deciduous hairs. 
9. Lamina glandulose beneath 140. D. Sprengelii (Klf.) O. Ktze. 
9. Lamina eglandulose. 
10. Segments 2—4 mm broad. Leaf-tissue of both 
sides minutely puberulous. Sori close to the 
edge. Veins 10—15-jugate. 
11. 3—4 pairs of lower pinne auriculiform. 
Segments very close entire 
141. D. struthiopleroides C. Chr. 
11. 3—4 pairs of lower pinne glanduliform. 
Segments not close, often serrate. 
143. D. conformis (Sod.) C. Chr. 
10. Segments 5—7 mm broad. Leaf entirely gla- 
brous; cost: beneath with some scattered light- 
brown scales........... 161. D. euchlora (Sod.) C. Chr. 
8. Rachis and coste more or less pilose. 
9. Sori indusiate. Lamina glandulose beneath 
142. D. Mercurii (A. Br.) Hieron. 
9. Sori exindusiate, or indusium very small. Lamina 
eglandulose. 
10. Lower pinne very gradually reduced. 
11. Sori oblong or linear 
see nr. 125. D. consimilis and nr. 126. D. heleroclita. 

iil, Storm TOMO c d e ous 144. D. scalaris (Christ.) C. Chr. 
10. Lower pinne abruptly reduced, the lowermost 
glanduliform. 
11. Leaf-tissue of upperside glabrous. 
12. Sori medial. Rachis with some few 
SCALES SH ania oda s 146. D. Bradei Christ. 
12. Sorisupramedial. Rachis densely ochra- 
ceo-tomentose without scales 
154. D. rudis (Kze.) C. Chr. 
11. Leaf-tissue of upperside finely pubescent. 
12. Sori medial. Coste on both sides se- 
LoseaM Bolivia re 147. D. Rusbyi C. Chr. 
12. Sori near the margin. Rachis and costze 
beneath very shortly and densely pul- 
WENN OE TT 148. D. Christensenii Christ. 
7. Segments crenate or more or less lobed. 
8. Basal segments with an interne auricle which over- 
laps the rachis. 
D. K. D. Vidensk. Selsk. Skr., 7. Reekke, naturvidensk. og mathem. Afd. X 2, 17 
