﻿Sori indefinite, forming large patches on the under surface of the frond, 

 occupying the ultimate segments or the lower sinuses, or placed on Iransver- 

 sally or longitudinally oblong, stalked segments near the base of the frond. 



Rhizome commonly short-creeping. Fronds dimorphous, articulate into 

 a depression of the rhizome. Barren fronds (basal fronds) roundish-reniform 

 in general outline, closely applied to the substratum, at least at the base, 

 collecting quantities of detritus into which the roots grow, the outer edge en- 

 tire or more or less deeply lobed; fertile fronds standing out from the sub- 

 stratum, forked or more generally dichotomously branched with stag-horn-like 

 divisions; surfaces often clothed with more or less deciduous stellate hairs; 

 principal veins dichotomous, secondary ones anastomosing ; areolae with includ- 

 ed free veinlets. Diels, in Engl, k Prantl, Nat. Pfl.Fam., l\ fig. 177. (*) 



Paleotropical, and in temperate Australia. 



Arrangement of the sections. 



§1. EUPLATYCERIUM. Sori on the ultimate segments or in the lower si- 

 nuses of the fertile fronds, but then not as in § 2. 



§ 2. SCUTIGERA. Sori placed on specialized, stalked, oblong or broadly re- 

 niform segments springing from the lower part of the frond, in the lowest 

 sinus. 



§ 1. EUPLATYCERIUM. 



a, 



Sori i to each fertile frond, occupying the primary disk (i. e. the cuneate 

 base of the frond), placed against the upper edge. (1) P. grande. 



a.a. Sori 2 to each fertile frond, occupying the secondary disks (i. e. the cuneate 

 base of the primary fork branches), placed against the upper edge, 

 if.. Fronds forked, both fork branches dichotomously branched. (2) P. Wallichii. 

 ^.:^. Fronds forked, the outer branch of each frond simple, broadly cuneato- 

 flabellate, 2-cornate, the inner dichotomously branched. 



(3) P. Wilhelminae Reginae. 

 a.a.a. Sori several to each fertile frond, occupying the ultimate segments. 



{*) Mostly beautiful plants, whose extraordinary appearance has made them universally 

 beloved in cultivation. 



