120 68 



16. Leaf-tissue of both sides 

 glabrous. Indusium gla- 

 brous 88. D. riouerdensis C. Chr. 

 16. Leaf-tissue of both sides 

 finely pubescent. Indu- 

 sium setose 



86. D. rivulariformis Ros. 

 9. Rachis densely pulverulent by very short hairs, 

 long hairs being absent or few among the short ones. 

 10. Lamina towards base gradually and shortly 

 attenuate. West-Indian and Àndine species. 

 11. Indusium persistent, densely setose. Under- 

 side densely glandular. Jamaica 



89. D. Nockiana (Jenm.) C. Chr. 

 11. Indusium none or small. Underside not 

 or sparsely glandular. 



12. Leaf throughout hairy by rather rigid 

 hairs. 

 13. Veins above without solitary, long 



setæ 90. D. muzensis Hieron. 



13. Veins above with solitary, long 



setæ 91. D. columbiana C. Chr. 



12. Leaf glabrous or very inconspicuously 

 hairy between the veins. 

 13. Hairs of costæ and veins minute; 

 underside slightly glandulose. Sori 

 supramedial with a glandulose in- 

 dusium. Cuba 92. D. piedrensis C. Chr. 



13. Hairs of costæ and veins rather long, 

 rigid; underside eglandulose. Sori 

 medial, exindusiate. Andes 



93. D. boqueronensis Hieron. 

 10. Lamina towards base abruptly attenuate. 



11. Andine species 94. D. lepidula Hieron. 



11. Brazilian species 95. Ö. Lindmani C. Chr. 



8. Lamina coriaceous or rigidly papyraceous. 

 9. Stipe and rachis glossy, atropurpureous. 



10. Costæ beneath glabrous. 96. D. laevigata (Mett.) C. Chr. 

 10. Costæ beneath slrigose.... 97. D. Crossii (Bak.) C. Chr. 

 9. Stipe and rachis stramineous or greyish. 



10. Pinnæ scarcely 2'/i cm long, often subentire; 

 veins 2— 4-jugate. Stipe much longer than 



the lamina 99. D. Millei n. sp. 



10. Pinnæ 4 — 10 cm long, deeply pinnatifid; veins 

 4 — 10-jugate. Stipe as a rule shorter than the 

 lamina. 

 11. Rachis densely pulverulent by very short 



hairs, without long hairs.. 92. D. piedrensis C. Chr. 

 11. Rachis subglabrous or more or less hairy 

 by longer hairs. 



12. Lamina with a rounded base, the lo- 

 wer 1 — 2 pairs of [linnæ being auri- 

 culiform and rather closely placed. 



