Pteridophyten. 235 



Indian plants are concerned) as A. atiriculatum Sw. A Cuban spe- 

 cimen of this, agreeing perfectly with the original plate, is figured, 

 and various specimens are cited. The various distinct species wrongly 

 referred lo A. salicifoliuni of authors are discussed at some length; 

 these are: A. oligophylliun Kaulf., A. neogranatense Fee, A. Kapple- 

 rtanum Kunze, A. integerrimiirn Spreng., etc. The last species, 

 described originally from Porto Rico, is fully redescribed on the 

 basis of specimens from Porto Rico and others recently collected 

 in Cuba. A. salicifoliuni austrobrasiliense Christ (1906) is regarded 

 as a valid species, A. austrobrasiliense (Christ) Maxon, related to A. 

 oligophyllwn. A. rectaugulare Maxon, sp. nov. , is described from 

 Cuba, being based upon Wright's no. 841 (pro parte); it is known 

 also from Haiti and is apparently closely related to the Peruvian 

 plant erroneousl}^ figured by Mettenius as A. salicifolium. 



IL A new genus of asplenioid ferns. The newgenus Holodictyum 

 Maxon is proposed, based on Aspleniurn Ghiesbreghtii Fourn. from 

 Mexico. There are 2 species, H. Ghiesbreghtii (Fourn.) Maxon and 

 H. Finckii (Baker) Maxon {Aspleniuni Finckii Baker), both Mexican. 

 ^^Holodictyum differs from Asplenium and Diplasium in its pronounced 

 hexagonal areolation, this accompanied by a complete suppression 

 of lateral nerves. 



The venation thus shows some approach to the type of Dipla- 

 siopsis\ but in that genus, as in Hemidictyum , there arewell-developed 

 lateral nerves, lost in a net-work only at the margin." The venation 

 of H. Finckii is shown in a nature print, at natural size. 



III. The identity o[ Asplenium rhisophyllum L. The Linnaean 

 description (1753) included mention of 3 forms from widely separate 

 regions, namely: Jamaica, Siberia, and eastern North America. 

 It is shown that ihe name rhisophyllum properly attaches to the 

 United States plant, in accordance with the historic usage, as Catnp- 

 tosorus rhisophyllus (L.) Link. The other 2 species are: Camptosonis 

 sibiricus Rupr., known from China, Siberia and Japan, and 

 Fadyenia Hookeri (Sweet) Maxon {Aspidium Hookeri Sweet), of the 

 West Indies. The last is usuall}?" known as Fadyenia prolifera (Sw.) 

 Hook. & Grev. , but the name prolifera is not available. 



IV. A new name for Anaxetum. Anaxetum Schott, 1834, is in- 

 validated by Anaxeton Gaert., 1791. Pleuridium Fee, 1850 — 52 which 

 is synonj^mous, is invalidated by Pleuridium Bridel, 1819. The new 

 generic name Pessopteris Underw. & Maxon, of identical application, 

 is proposed, the tj^pe and sole species being Pessopteris crassifolia 

 (L.) Underw. & Maxon [Polypodium crassifolium L.), of wide distri- 

 bution in tropical America. 



V. The Cuban species of Adiantopsis. A. radiata, A. pedata, and 

 A. paupercula are known from Cuba. A fourth species is here de- 

 scribed : Adiantopsis rupicola Maxon , sp. nov. , founded on P a 1 m e r 

 & Riley 242, from partially shaded limestone cliffs in mountains 

 near El Guama, province of Pinar del Rio, Cuba, March 10, 

 1900. It is not ver}^ closely related to the other species. 



VI. A new genus allied to Vittaria. "The Jamaican plant described 

 by Swartz as Pteris angustifolia, placed under Vittaria by Baker 

 and taken up under this name by Di eis, has been recognized by 

 several writers as typifying a distinct genus to which the nam.e 

 Pteropsis has been applied." But Pteropsis Desv., 1827, which em- 

 braced 10 species belonging to at least 5 genera, is shown to be 

 properly a synonym of Drymoglossum Presl., of later data, which 

 it must supersede. To accommodate Pteris angustifolia Sw. the new 



