﻿71. roLTroDiuM. § 6. pleopeltis. c^. phymatodes. 68t 



3.3. Slipes shorl-winged. Fronds as in 3.3.3. * 



(2026) P. dolichopterum. 



3.3.3. Stipes long-winged. Fronds typically pinnati/id with 3 



or more pairs of lateral segments below the terminal one. 



4L. Fronds small or middle-sized, less than 40 c.M. 



long above the wing of the stipe. Rhizome scales 



linear or lanceolate. 



5. Rhizome scales sparse. 



G. Rhizome fleshy. (205a) P. rivulare. 



©.©. Rhizome woody. (2036) P. pentaphyllum. 



5.5. Rhizome scales crowded. (204) P. insigne. 



4L.4:. Fully developed fronds large, more than 40 cM. 



long. (205) P. dilatatum. 



a.a. Sori more or less deeply immersed. (^) 



b'. Fronds dimorphous. Barren fronds with the segments lanceolate-oblong, 

 fertile with the segments narrowly linear. (206) P. incurvatum. 



b'. v. Fronds uniform, rarely subdimorphous. 



c'. Fronds + as broad as long, the lower lobes deflexed. 



(207) P. macrochasmum. 

 c'.c'. Fronds distinctly longer than broad. 

 d'. Sori shallowly immersed. (^) 



*. Fronds under i M. long. (208fl) P. phymatodes. 



^.:^. Fronds more than i M. long. 



(2086) P. phanerophlebium. 

 d'.d'.Sori deeply immersed. 



■ e'. Lateral segments in + 2 — dO pairs. 



X. Under surface pale-violescent. Fronds + 15 c.M. 



long. (209) P. violascens. 



x.x. Under surface green. Fronds ± 20 — 50 c.M. long. 



(210) P. nigrescens. 

 e'.e'. Lateral segments in many or numerous pairs. 



f. Texture thinly papyraceous; segments acuminate. 



(211) P. Schneider!. 

 f'f- Texture firm ; segments acute to blunt. 



(212) P. longissiraum. 



(^) See also I*. coniEnutatum, Bl. 

 See also il*. longiissimuni, Bl. 



