﻿74 8. IIYMENOPHYLLUM. § 1. EUHYMENOPHYI.LDM. 



Fronds deltoid-obovate or triangular-lanceolate, with a broadly winged rachis, 

 6 — 16 c.M. long, 4 — 5 c.M. broad, 3-pinnatifid. Pinnae moderately close, 1 — 2 

 c.M. broad, lowest largest, with a winged rachis, ovate-oblong in outline. 

 Pinnulae close or imbricating, pinnatifid. Segments simple or forked, with a 

 single central vein in each ultimate segment. Veins hairy and purveyed with 

 long and broad, undulate and crisped, entire crests like the rachises. Sori 

 terminal on lateral segments, 1 or more to a pinna ; indusium obovate, divided 

 about ^l^-^siy down; valves entire; receptacle exserted, filiform. 

 Malaya. 



(21) H. borneense, Jlfe., Hk. Bk., Syn. Fil., 62. 



Stipes ± 2'/2 c.M. long, very slender. Fronds square or fan-shaped in 

 general outline, ± 1 — 2 c.M. long, + 1 c.M. broad, divided down like a 

 fan nearly to the base, the divisions linear, dichotomously branched. Ultimate 

 segments S'/j — T'/^ m.M. long, + 1 m.M. broad; the surface hairy and the 

 margin ciliate with branched, rufous hairs. Sori terminal, solitary, orbicular, 

 the cuneate base sunk in the frond; valves ciliate. 



Borneo. 



(22) H. pedicielarifolium, Ce*., Fel. Becc. Polin., 2 & 6. 

 Fronds subsessile, o — 10 c.M. long, 1 — 1 '/^ c.M. broad, pendulous, oblong 



in general outline, pinnatifid to within a short distance of the costa. Lower 

 lobes rhomboidal-cuneate, cleft on both sides, or on one side only ; upper lobes 

 simple, linear-oblong, the margin undulate or crisped, the costulae beneath 

 covered with reddish hairs. Sori terminal on the segments of the lobes; 

 indusium free, cleft nearly to the base. 

 New Guinea. 



* (23) H. obtusuin, Mie. ^ Am., Hk. Bk., Syn. Fil., 65; Hk., Spec. 

 Fil., I, tab. XXXni, D. 



Stipes filiform, to 5 c.M. long, ciliate. Fronds 5—10 c.M. long, 27.2-S 

 c.M. broad, oblong or lanceolate-oblong; main rachis winged trough tout, but 

 sometimes nudate in the lower part. Pinnae lanceolate, oblong or cuneate- 

 oblong, deeply pinnatifiid into few or several simple, or forked segments on 

 each side. Ultimate lobes linear or oblong, bluntly rounded. Texture very 

 thin; margin and central ribs as well as the rachises densely clothed with 

 stalked, stellately branched hairs. Sori 2—6 to a pinna, terminal on the 



