22. DEYOPTERIS. § 1. LASTBEA. 171 



Vs— ^/s'-way-'dow-n 'to the cdsta, serrate at the acuminate apex, decurrent; 

 connected with the terminal one ; lowest pinnae largest, triangular, to 

 20 cm. long, to 15 cm. broad at the base, petiolate, the apex similar to 

 the apex of the frond, the base 2-pinnate. Pinnulae ascending, to i — 5 

 on a side, the lowest posterior of the lowest pinnae the largest, 

 petiolulate, 5 cm. broad at the middle, with the apex similar to the 

 apex of the frond, the base pinnate, and the segments oblique, decurrent, 

 the lowest free, smaller than the central, 2 — 2'/, cm. long, ^/^ — 1 cm. 

 broad, blunt, coarsely crenate to lobed, obliquely rotundate-truncate at 

 the base. Ultimate segments (lobes or teeth; entire to serrate, blunt to 

 subacute. Texture rigidly coriaceous; surfaces naked; upper surface dark- 

 brown ■ or reddish-fuscous when dry, under one somewhat paler ; costulae 

 at)ove naked, or somewhat tomentose towards the base; veins oblique, 

 mostly 2 — 3-furcate or the lower pinnate ; a simple, forked or pinnate 

 vein proceeds from the costa or costula in the direction of the sinus 

 between two segments, often accompanied by a second one. Sori remote, 

 medial, terminal on short, anterior veinlets, immersed, prominent on the 

 upper surface; indusium coriaceous, black-brown, persistent. 

 Luzon. 



■ ' (61) D. inultiseta, c. Chr. 



This is: probably a larger form of D. setigera 0. Ktze only. 



(61a) D. Backeri, v. A. v. R. 



Omit this, it being a variety of D. setigera 0. Ktze. 



(62) W. siibai'liorea. C. Chr.; — var. attenuata, quadripinnata, 

 decomposita, biformis, Rst., in Fed., Rep., XII, 731 — 174. 



'Var. attenuata: Fronds 3-pinnate; pinnulae distinctly stalked, 

 lanceolate, acuminate, pinnate below the serrate apex, the segments 

 narrowed, 2 — 3 mm. broad, te basal oneS- produced. — New- Guinea. 



Var. quadripiunata: Fronds 4-pinnate ; leaflets obliquely 

 ovate, hardly longer than broad, sparingly crenated, the upper side 

 subinciso-dentate ; costae and costulae scaly at the base, the scales 

 lanceolate, ferrugineous ; sori 2 — i on a leaflet. — Neio Guinea. 



War. deeaitiposita: Fronds 4-pinnate; leaflets subpinnate at 

 the base, smaller than in the preceding. — Nelo Guinea. 

 ■''■ War. bif'oriuiis: Fronds 3 pinnate; rachises and costae scaly, the' 



