270-' 53. DIPLAZIUM. § 1. EUDIPLAZIUM. 



lateral pinnae alternate, short-stalked, erecto-patent, lanceolate, acuminate, 

 whether or not slightly dilated at the base, the central ones the largest, 

 + 25 cm. or more long, pinnate, the higher ones pinnatifid with broadly 

 linear lobes which are blunt at the acutely serrate and obliquely apiculate 

 apex, the highest ones the smallest, sessile, simple, acutely crenato-serrate, 

 passing gradually into the lowest lobes of the terminal pinna. Pinnulae 

 short-stalked, subcontiguous or somewhat remote, the lowest ones sub- 

 opposite, the others alternate, lanceolate, acuminate to 4'!^ cm. long or 

 the lowest anterior ones somewhat larger, ± ]. '/j cm. broad at the 

 slightly dilated base, with the upper base parallel to the rachis and the 

 lower nearly rounded, the lower part cut more than ^-way down to the 

 costa, the apex often subfalcate, acutely serrate; lower and central lobes 

 linear, subcontiguous, horizontally truncate at the apex which is provided 

 with a few acute teeth, the edges entire or slightly repand. Texture 

 rigidly chartaceous ; both surfaces naked, glossy ; upper surface olive-green, 

 lower paler; rachises stramineous or yellowish, sulcate above, subterete 

 beneath, provided with a few scattered, hair-like scales; costulae pinnate 

 in the lobes with 4 — 5 simple veins on each side. Sori elongate, parallel, 

 the lowest anterior ones double; indusium membranaceous, entire. 

 NeiO Guinea. 



(426) U. sISiBsyagscnse, ». A. r>. m., in Bull. Btz., WIS, XI, 9; 

 Athyrium sibuyanense, Gopel.^ in Leaf!., IV, 1152; C. Chr., Ind. Fil., Suppl. 



Stipes 50 — 100 cm. long, the base black and prickly and clothed 

 with caduous, brown scales, the upper part stramineous-green, smooth, 

 naked, as is the rachis. Fronds deltoid, + 1 m. long, 2 — 3-pinnate. 

 Lower pinnae opposite, horizontal, stalked, to 40 cm. long and 15 cm. 

 broad. Pinnulae petiolulate, 3 — 4 cm.' broad, acuminate, pinnatifid, or 

 pinnate in the lower part; segments hnear-oblong, the lower when free 

 adnate or sessile and sUghtly auricled, rounded, bluntish or mucronulate 

 at the apex, slightly serrate. Texture coriaceous; surfaces naked; veins 

 7 — 9 on a side. Sori occupying the lower half of the veins; indusium 

 narrow, brown. 



Sibuyan Island. 



(42c) ». amplifrons, ». A ». K., in Bull. Btz., 191S, XI, 8. 

 Near D. sibuyanense v. A. v. R. but the pinnae larger, to 60 cm. or 

 more long and 25 cm. or more broad, the pinnulae with the lower 



