6 ARKIV FÖR BOTANIK. BAND 14. N:0 19. 



It cannot properly be referred to any of the subgenera 

 defined by me. Its very remarkable resemblance with Ath]f- 

 rium pterorachis and certain characters, f. inst. the flattened 

 bases of the midribs of the pinnae seem to indicate that its 

 real alliance is with Athyrium resp. Diplazium. If this is the 

 case it should probably be referred to that group of dryop- 

 teroid Athyriums, which is so richly developed in Eastern 

 Asia. 



Aspleiiium Koseiidalilii C. Chr. sp. nov. 



PI. 2, Fig. 7. 



Euasflenium rhizomate erecto, stipitibus fasciculatis, foliis 

 glabris valde diversis. — Stipitibus compressis, superne late 

 canaliculatis inferne convexis, obscure viridibus, squamis fili- 

 formibus deciduis nonnullis onustis, mox glabratis, iis folio- 

 rum sterilium 5—6 (raro 12) cm longis, foliorum fertilium ad 

 20 cm longis. Laminis glabris, firmis, opacis. Lamina folio- 

 rum sterilium indivisa vel pinnata cum impari; lamina indi- 

 visa oblonga, 5 — 7 cm longa, 2 cm lata, basi aequaliter ro- 

 tundata, non decurrente, apice acuta vel rotundata, margi- 

 nibus obscure crenatis; pinna terminali laminae pinnatae folio 

 simplici simili, sed basi late cuneata, subdecurrente; pinnis 

 lateralibus 1— 2-jugis, ellipticis, obtusis, sessilibus vel basa- 

 libus breve petiolatis. In specimine typico adest folium ste- 

 rile, quod est lineari-lanceolatum (foliis Polypodii linearis 

 simile), acutum, 12 cm longum, medio 1 cm latum, ita pinnae 

 terminali folii fertilis simile. Lamina folii fertilis pinnata; 

 pinna terminali lineari-acuminata, in specimine typico 13 cm 

 longa, in specimine altero 21 cm longa, supra basin cuneatam 

 1,2 cm lata, leviter repandulo-crenata, infra apicem subtus 

 ad costam bulbifera; pinnis lateralibus 1 — 2-jugis, elliptico- 

 lanceolatis vel subellipticis, breve petiolatis, obtusis vel sub- 

 acutis, maximis 6 cm longis, 1 — 1 Vs cm latis. Venis furcatis 

 vel rare indivisis, sub angulo 45° ascendentibus, 3 — 4 mm 

 inter se distantibus. Soris medialibus, nee costae nee mar- 

 gin! attingentibus, ad 7 mm longis. Indusio glabro, angusto, 

 integro. 



Madagascar la: Moramanga, in silvis primaevis, 3. 10. 

 1912. 



