107 



159 



173. Dryopteris Thomsonii (Jenni.) C. Chr.; Smiths. Misc. Coll. 52: 389. 



Syn. Dryopteris Stübelii Hieron., C. Chr. Revision nr. 67. 



Area; Jamaica, Colombia; Ecuador, Llalla, Spruce nr. 5651 (Kew, L, RB). 



174. Dryopteris mapiriensis Rosenstock, Fedde, Repert. G: 315. 1909. — Fig. 18. 



Type from Bolivia: San Antonio prope Mapiri, 800 m, Buchlien nr. 1131 

 (R!). A most distinct species, different from the allied D. decussata by its small 

 size, fewer veins, densely villous rachis and costæ, thin texture and lack of aëro- 

 phores at the base of the costules. 



Fig. 18. D. mapiriensis Ros. — 

 Pinna x */&; two segments from 

 the underside and one seen 

 from above, x I'l»; fragments 

 seen from both surfaces x 4. 

 (orig.) 



Fig. 19. D. polgphlebia n. sp. Portion of 

 pinna, X *!., ; segment x \^h and frag- 

 ment X 4. 



175. Dryopteris decussata (L.) Urban, Symb. Antill. i: 19. 1903; C. Chr. Ind. 261. 



Syn. Polypodium deciissainm L. sp. •': 1093. 1753; Jenm. Bull. Bot. Dept. Ja- 

 maica n. s. 4: 130. 1897. (for other synonyms see Ind. Fil.). 

 Polypodium grammicum Spr. Neu. Entd. 3: 6. 1822! 



21* 



