67 



119 



18. Veins distinct. 

 Lamina firmly 

 membranous,the 

 underside spar- 

 sely pubescent, 

 the upperside 

 subglabrous 

 83. D. argentina (Hieron.) C. Chr. 

 12. Hairs of rachis beneath persistent, often 

 many and sometimes pluricellular. 

 13. Indusium none or very small, rare- 

 ly seen. 



14. Rhizome erect or obliquely erect. 

 15. Hairs of rachis long, patent, 

 often pluricellular. 

 16. Stipe more or less hairy, 

 not clothed with a dense 

 mass of woolly hairs. 

 17. Lamina herbaceous; 

 basal segments with- 

 out auricles 

 84. D. oligocarpa (H. B. W.) O. Ktze. 

 17. Lamina thickly mem- 

 branous; basal seg- 

 ments with an in- 

 terne auricle 



170. D. miiltifonnis n. sp. 

 16. Stipe and lower part of 

 rachisvery densely hairy 

 by woolly, patent, long 

 hairs .... 166. D. lanipes C. Chr. 

 15. Hairs of rachis short, most- 

 ly adpressed, unicellular. 

 Andine species. 

 16. Veins 7—8 to a side in 

 the slightly oblique seg- 

 ments. . 86. D. riviilariformis Ros. 

 16. Veins 10-11 to a side 

 in the falcate -ligulate 

 segments 



112. D. utahagensis Hieron. 

 14. Rhizome decumbent or short- 

 creeping. South Brazil 



87. D. Regnelliana C. Chr. 

 13. Indusium persistent. 



14. Rachis densely pilose by long, 

 patent hairs 



85. D. pilosiila (Kl. et Karst.) Hieron. 

 14. Rachis short-hairy. 



15. Indusium black. Guatemala 



118. D. melanochlaena C. Chr. 

 15. Indusium pale. Rhizome 

 short-creeping. 



16* 



