436 54. ATHYRIUM. 



iigomo oroct , Stiper firm , erect , nakod, darkbrowii) to j_ 70 o M 

 long oiNU^er. Fronds subdeltoid, 60 — 200 c.M. long, 50 — 120 c.M. broad. 

 Lower pinnaet8v60 c.M. long, T'/j — 20 c.M. broad, pinnate. Pinnulae slight- 

 ly stalked, 1—5 cTMvbroad, narrowed towards the apex, cut down ^/j or 

 more on the way to the wistginto close or nearly close, linear-oblong, blunt, 

 toothed, subfalcate segments, wteeijare to ± I'/i c.M. long, to + '/i <5.M. 

 broad. Texture herbaceous; rachis anJK^rfaces naked; main veins pinnate 

 in the lobes ; veins simple or forked. Sori oMsqg, short, close to the costu- 

 lae, the lower ones often double, close to the iuiSn^, not reaching more 

 than Va'^^y ^^^ edge; indusium ciliate or eroso-fimbriateN^JResembles Di- 

 plazium polypodioides, Bl. in habit (Bk.). 

 Java, CeloboB, Philippmog. 



55. ^^SPLElVlUai, lAnni. 



Sori linear or linear-oblong, straight or slightly recurved, springing from 

 the sides of the veins, oblique to the costa, or occupying the sides of the single 

 central veins of linear ultimate segments, only 1 sorus to a vein. Indusia 

 of the same shape as the sori, springing from the same sides of the veins, 

 opening obliquely towards the costa or occasionally towards the margin. 



Rhizome creeping or erect, the scales coarsely cancellate, with the areolae 

 mostly decoloured, i. e. the cells with the side walls conspicuously thickened 

 and mostly brown-coloured, the lumina generally pale or decoloured (Sadeb., 

 in Engl. & Prantl, Nat. Pfl.Fam., I*, fig. 40, B). Stipes not articulate to the 

 rhizome, with 1, or 2 free, + concave vascular bundles, which mostly unite 

 towards the lamina (or higher) into a single tetrarchous one [ ) ( , )( , )-( , 

 y~^, X. \/> \I. ]• Fronds simple or divided; veins free or rarely anas- 

 tomosing. Hk. Bk., Syn, Fil , tab. IV, fig. 38, a-c, h. 



Cosmopolitan. 



Arrangement of the sections. 



§1. THAMNOPTERIS. Vein tips united by a ± marginal strand or anintra- 

 marginal line. Fronds simple. Dials, in Engl. & Prantl, Nat. Pfl.Fam., 

 I*, fig. 125, E. 



§ 2. NEOTTOPTERIS. Veins free. Fronds simple. Diels, Lc, fig. 125, F— G„ 



