8. HYMENOPHYLLUM. ^ 2. LEPTOCIONIUM. 77 



Rhizome creeping, nearly naked, filiform. Stipes filiform, terete, 1 '/a — 2'/j 

 c.M. iong. Fronds 4—5 c.M. long, 2 — 2''j c.M. broad, ovate or ovate-oblong, 

 broadly rounded at the base, narrowed towards the apex, the main rachis 

 narrowly marginate, subterete below. Pinnae spreading, (the lower divaricating), 

 subcontiguous, suboblong, the apex adscendent. Pinnulae spreading, subremote, 

 simple or dichotomous, the lowest pinnafifid. Lacinulae linear, olongate, ap- 

 proximate, flat, the apex entire, the margin subentire or denticulate, the teeth 

 small, remote. Texture membranaceous, diaphanous, firm ; ' colour olivaceo- 

 fuscous; main rachis flexuose; veins straight, blackish-brown. Sori on the 

 lacinulae; indusium moderately immersed, elliptical, turgid, 2-valved + '/2"'*^'^y 

 down, the valves entire or obscurely denticulate; receptacle setiform. 



Borneo; Assam. 



* (27) H. K.iirxii, Ffantl, Morph. d. Gefasscr., I, Hymenoph., S4. 



Main rachis narrowly winged, the wing entire, not toothed. Ultimate 

 segments toothed. Sori terminal on the main and higher secondary rachises, 

 the valves of the indusium hardly toothed. — If this plant is the same as 

 lately found by the Ladies von Gravenitz and Stein, the description will be: 

 Rhizome creeping, filiform, sparingly hairy. Stipes distant, more than + 1 

 c.M. apart, sparingly hairy, 1 — 2 c.M. long, narrowly winged (rather marginate) 

 towards the frond. Fronds lanceolate-oblong to subdeltoid-^feovate, 4 — 5 c.M. 

 long, I'/a — 2 '/a c.M. broad: main rachis narrowly winged, the vving entire, 

 not toothed. Pinnae cut down to a winged, not toothed rachis into linear, 

 simple or forked segments, which are blunt at the apex, toothed at the 

 margin. Texture thin, hyaline; under surface covered with scattered, spine- 

 like hairs on the costae. Sori terminal on the main and higher secondary 

 rachises and some anterior ■ segments of the higher pinnulae; indusium 

 oblong, the base conical, covered with spine-like hairs on the under side, 

 the valves subacute, slightly toothed at the point; receptacle linear, slightly 

 exserted. fSee the Appendix. 



Java. 



(28) H. L<obbii, Moore, V. D, B'., Ned. Kruidk. Arch., V, 176. 



Rhizome filiform, branched, hirsute with deciduous, yellowish hairs. 

 Stipes filiform, terete, flexuose, 10— IS m.M. long. Fronds 3—4 c.M. long, 

 6 — 8 m.M. broad; main rachis narrowly winged by the decurrent pinnae, 

 filiform, flexuose. Pinnae narrow, spreading, slightly incurved, contiguous, 

 obcuneate, either 1— 2-furcate, or pinnatifid with a single lacinula on each 



