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Benedict, R. C. The Genus Ceratopteris : a Preliminary Revision. Fig. (Bull. 

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— Studies in the Ophioglossaceae III: Key to Botrychium in North America, 

 Group of B. ternatum. (Torreya IX 1909, 197—200.) 



Black C. A. The Development of the Imbedded Antheridium in Dryopteris 

 stipularis (Willd.) Maxon and Nephrodium molle. With 3 plates. (Bull. Torr. 

 Bot. Club XXXVI 1909, 557—571.) 



Boodle, L. A. and Hiley, W. E. On the Vasculare Structure of some Species of 

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Campbell, D. H. The Prothallium and Embryo of Danaea. Prel. Note. (Journ. 

 of Bot. XXIII 1909, p. 691—692.) 



Christ, H. Primitiae floras costaricensis VI. Fig. (Bull. Soc. Bot. Geneve 2, 



I 1909, p. 216—236.) 



— Fougeres d'extreme-orient. (Bull. Acad. Intern. Gdogr. Bot. 1909, p. 146—179.) 



— Filices, dans: Nova Guinea; resultats de I'expedition scientifique nderlandaise 

 a la Nouvelle-Guinee. Leiden (Brill) 1909, p. 149—164. 



Christensen, C. The American Ferns of the Group of Dryopteris opposita 

 . contained in the U. S. National Museum. (Smithson. Misc. Coll. LII 1909, 

 p. 365—396.) 



Clute, W. N. Race Forms of Ferns XI. (Fern Bull. XVII 1909, p. 88—89.) 

 Coker, W. C, Lycopodium adpressum forma polyclavatum from South Carolina. 

 (Fern Bull. XVII 1909, p. 83—85.) 



Dutton, D. L. Osmunda cinnamomea forma angusta. (Fern Bull. XVII 1909, 



p. 89—90.) 

 Eames, A. J. On the Occurrence of Centripetal Xylem in Equisetum. With 



plate. (Journ. of Bot. XXIII 1909, p. 587—603.) 

 Hicken, C. M. Clave artificial de las Vitaridas argentinas. (Ap. Hist. Nat. 



B. Aires I 1909, p. 49—50.) 



— Una nueva variedad de helecho. (I. c, p. 51.) 



Kldston, R. and Gwynne-Vaughan, D. T. On the Fossil Osmundaceae III. 

 With 8 plates. (Trans. R. Soc. Edinb. XL VI 1909, p. 651—665.) 



Marquette, W. Concerning the Organization of the Spore Mother -cells of 

 Marsilia quadrifolia. With 2 plates. (Trans. Wisconsin Acad. XVI 1909, 

 p. 81—106.) 



Marten. J. List of Ferns found at and around Mussovie, 1908. (Journ. Bom- 

 bay Nat. Hist. Soc. XIX 1909, p. 179-183.) 



Masefield, J. R. Staffordshire Ferns. (Rep. Trans. North Staff. Field Club 



XLIII 1909, p. 102—107.) . 

 Poyser, W. A. The Fern Flora of Pennsylvania. (Fern Bull. XVII 1909, 



p. 65—83.) . 

 Rippa, G. Le Pteridofite raccolte da G. Zenker al Congo. (Bull. Ort. Bot. 



Univ. Napoli II 1909, p. 109.) 

 Sernander, R. Pilularia globulifera L. funnen i Nerike. (Sv. Bot. Tidskr. 190/, 



P- 4 24.) 



Sinnott, E. W. On Mesarch Structure in Lycopodium. With plate. (Bot. Gaz. 



XLVIII 1909, p. 410—419.) 

 Watson, D. M. S. On Mesostrobus, a New Genus of Licopodiaceous Cones 



from the Lower Coal Measures, with a Note on the Systematic Position of 



Spencerites. With plate and fig. (Ann. of Bot. XXIII 1909, p 379-398.) 

 Zalessky M On the Identity of Neuropteris ovata Hoffm. and Neurocalhptens 



gleichenioides Sterzel. With plate. (Mem. Com. Geol. Petersb. n. ser. 1909, 



22 pp.) In Russian and English. 



Hedwigia Band XL IX. 



