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

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

 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. & Prantl, Nat. Pfl.Fam., P, 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. 

 ;|c. Fronds forked, both fork branches dichotomomly branched. (2) P. Wallichii. 

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

 flabellate, 2-cornate, the inner dichotomously branched. 



(3) P. Wilhelminae Reginae. 

 n,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. 



