﻿55. ASPLENIUM. § 3. EU-ASPLENIU5I. 449 



x.x. Pinnae iO — i8 c.M. long, with the upper 

 base rather truncate or rotundato-cuneate. 



(47a) A. nigrescens. 

 (476) A. militare. 

 2.2. Higher sori erecto-patent, not subparallel to the costa. 

 3. Lower pinnae reduced, suborbicular or subcordate. 



(48) A. pellucidum. 

 3.3. Lower pinnae not or hardly reduced. 



S:. Pinnae suddenly narrowed from a broad base 

 into a narrow point. Stipes + black. 



(49) A. dimidiatum. 

 4=.4L. Pinnae not suddenly narrowed into the point. 



Stipes mostly green, grey or brown. 

 S. Pinnae narrow, to + 2^1^ c.M. broad. 

 €. Pinnae varying from crenulate to in- 

 ciso-crenate. 



f. Crenulate. (30) A. Cesatianum. 

 y.7. Inciso-crenate. 



S. Stipe and rachis fibrillose. 



(51) A. crinicaule. 

 8.8. Stipe and rachis + scaly 

 or nearly naked. 



(62) A. acutiusculum. 

 G.9. Pinnae serrate or toothed. 



^. Rachis strigoso-paleaceous. 



(53) A. impressum. 

 f .•{•. Rachis naked or slightly scaly. 

 +. Pinnae ascending. Sori rath- 

 er regular, + 5 — 6-jugafe. 

 (54) A. Gardneri. 

 +.+. Pinnae spreading. Sori rath- 

 er irregular, more numerous. 

 (55) A. adiantoides. 

 5.5. Pinnae broader, 2^1^ — 77j c.M. broad. 

 ^. Pinnae minutely 2-serrate. 



(56) A. Sancti-Christophori. 

 •{•.•{•. Pinnae entire, crenate or irregularly 

 and sharply toothed. 

 FiLicES. 29 



