39 



285 



c. l';2 dem. vel ultra lata, versus apicem piuuatifidum acuminatum sensim decre- 

 scente, versus basin siibgiadatim attenuata, herbacea, pallide viride, ad rachin 

 coslasque utrinque pilosa, inter venas pilis haniatis brevissimis ulrinque puberula, 

 bipinnalifida. Pinnis alternis vel suboppositis, parum erectis, infeiioribus sub- 

 gradalim reductis, infimis 3-jugis auriculiformibus, 3-4 cm. inter se dislanlibus 

 (Typus 111), inframedialibus maximis, 7 — 9 cm. longis, I'/j cm. latis, c. 2 cm. inter 

 se dislanlibus, acuminalis, ad aiam 1 1'/^ mm. latam pinnatifidis. Laciniis c. 20- 

 jugis, obiiquis vel leviter falcatis, obtusis vel subacutis, integris, basalibus aequaii- 



Fig. 11. D. riouerdcnsis 

 C. Chr. 



Fig. l.'i. /.*. caiicaciisis 



(Hier.) C. Glir. From tlie 



Costa Rican specimen. 



Fig. 14. D. ptarmica 



(Kze.) O. Ktze. Wachet 



II. 58. 



Fig. 12. D. Regnelliana C. Clir. 



bus vel anteriore saepe abbreviata. Venis 8 9 jugis, indivisis, basale anteriore in 

 sinuni excurrente, posteriore marginem supra sinum attingente. Soris parvis mar- 

 gin! approximatis. Indusiis minimis, mox deciduis, setosis. 



Tilis species, for a long time considered a form of D. diplazioides, resembling 

 it mucb in habit, is however distinctly different from that species by its shorl- 

 creeping rhizome, more numerous and more reduced lower pinnæ, the upjier pinnæ 

 serrulate, not entire, more slender rachis, more deeply incised pinnæ, only the 

 lower anterior vein reacliing tiie sinus, sori very rarely a little elongated and fur- 

 nished with a densely pilose indusium, still very small and difficult lo lind. — 



