494 Pteridophyten. 



This is, in brief, the ground taken by the writer, whose extensive 

 studies of the Philippine fern-flora have led to what is here offered 

 as a natural arrangement of the group in question. Following a 

 brief historical discussion and a review of the value to be given to 

 various technical characters usually regarded as diagnostic, the 

 author redefines the genus Athyriiim as follows: 



"The most central and most primitive genus of Asplenieae, 

 typically distinguished from Dryopteris and other primitive Polypo- 

 diaceae by having an elongate indusiate sorus, and critical primitive 

 Athyria having usually finely cut and non-deltoid fronds; distin- 

 guished from Asplenium by having paleae with thin lateral walls 

 and pigment in the lumen , by having in the base of the stipe two 

 vascular bundles which unite above to form a peripheral horseshoe- 

 shaped one, and by usually having some or all of the sori curved 

 across the vein or occupying both sides of it; distinguished from 

 Diplasiopsis by the rupturing indusium of the latter and its com- 

 bination of thin lamina and anastomosing veins; and from Blechmim 

 by having the sori on veins which run directly or obliquely toward 

 the margin.'' 



The writer states that more than 50 species, all terrestrial, are 

 known to him from the Philippines, of which number 46 are here 

 treated. An artificial key to these is here provided, following which 

 the species are all listed by groups, the füll s3moymy of each being 

 given together with a record of the specimens examined. The species 

 described as new er those which by reason of their transfer to 

 Athyrium are listed under new "combinations" are as follows: 



Athyriiim japonicum (Thunb.) Copel. {Asplenium japonicum 

 Thunb.); Athyriiim brevipinnulum Copel., sp. nov., from Luzon, 

 allied A. nigripes ; A. nigripes Mearnsianum Copel. var. nov., from 

 Luzon; A. Elmeri Copel., sp. nov. from Negros, allied to A. opacum ; 

 A. stramineum Copel., sp. nov., from Negros, a member of the 

 group of A. nigripes; A. platyphyllum Copel., sp. nov., from Luzon, 

 also allied A. nigripes; A. atratum (Christ) Copel. {Diplasium atratum 

 Chrjst); A. oligosorum Copel {Diplasium oligosorum Copel., 1907; ; 

 A. Blumei (Bergsm.) Copel. {Asplenium Blumei Bergsm.), with nu- 

 merous synonyms; A. fruetuosum Copel. {Diplasium fruetuosum 

 Copel., 1906); A. dolichosorum Copel. {Diplasium dolichosorum Copel., 

 1906); A. maximum (Don) Copel. {Asplenium maximum Don.); A. 

 davaoense Copel. {Diplasium davaoense Copel., 1906); A. esculentum 

 (Retz.) Copel. {Hemionitis esculenta Retz.); A. braehysoroides Copel. 

 {Diplasium braehysoroides Copel., 1907); A. Whitfordi Copel. {Dipla- 

 sium Whitfordi Copel. 1906); A. Bolsteri Copel, {Diplasium Bolsteri 

 Copel. 1906); A. geophilum Copel., sp. nov., from Negros, related to 

 A. Bolsteri; A. Williamsii Copel. {Diplasium Williamsii Copel. 1906); 

 A. pinnatum (Blanco) Copel. {Allantodia pinnata Blanco), with many 

 synonyms; A.palauanense Copel. {Diplasium \ palauanense Copel. 1905); 

 A. tabacinum Copel. {Diplasium tabacinum Copel. 1906); A. pariens 

 Copel. {Callipteris pariens Copel. 1905); A. cordifolium (Blume) Copel. 

 {Diplasium cordifolium Blume); A. Merrilli Copel. {Diplasium Merrilli 

 Copel.); and A. porphyrorachis (Baker) Copel. {Asplenium porphyro- 

 rachis Baker). Maxon. 



Copeland, E. B., Ferns ofsouthern China. (The Phil. Journ. 

 Sc. C. Bot. III. p. 277-284. October, 1908). 



In reporting upon three collections of pteridophyta from the 



