Bryophyten. — Pteridophyten 229 



IS small, the seta Stretches to 30 or 40 mm. in length, and the extended 

 capsule is erect, elongated, cylindrical, and its wall is a single layer 

 of cells. 



AJonoclea possesses two kinds of rhizoids^ corresponding to those of 

 Marchantia in size. direction of growth, and in the presence of tubercles 

 in those of one type. 



The absence of air Chambers and ventral scales is probably due to 

 the nearly aquatic habit of the plant. 



The evidence gained from the study of the origin and structiire of 

 the male receptacle, and of the antheridium and archegonium, and from 

 the structure of the wall of the capsule, and the presence and direction 

 of growth of the two types of rhizoids, favors the view that Monoclea is 

 most closely related to the lower Marchantiaceae. Maxon. 



Underwood, L. M., The early writers on ferns and their 



collections. HI. W. J. Hooker, 1785 — 1865. (Torreya. 



IV. p. 145—150. October 1904.) 



The work of Robert Brown, Bary de St. Vincent, Link and 

 Desvaux is briefly touched upon, and there is presented a chrono- 

 logical diagram indicating the periods of activity of the principal fern- 

 systematists from the time of J. E. Smith to the present. The work of 

 Hook er and his associates is discussed at some length. Maxon. 



Eaton, A. A., Notes on Isoetes. (The Fern Bulletin. XIII. 

 p. 51—53. April 1905.) 



The following are described as new: /. Piperi and /. echinospora 

 Flettii, the types of both from the State of Washington; I. Engelmanni 

 fontana, the type from Pennsylvania. 



The new combination /. echinospora maritima (Underw.) Eaton is 

 published. Maxon. 



Harper, Roland M., The Fern Flora of Georgia. (The 

 Fern Bulletin. XIII. p. 1 — 17. January 1905.) 



A succinct account of the different geological formations, the clima- 

 tology and topography of Georgia, and the resulting influence upon 

 the pteridophytic flora. Fifty-six species and subspecies (excluding 2 in- 

 troduced species) are accredited to Georgia, the distribution being 

 given in some detail together with the more important reference to re- 

 cent records for the State. Maxon. 



Maxon, Willam Ralph, A New Botrychium from Jamale a. 

 (Bulletin of the Torrey Botanical Club. XXXII. p. 219 

 —222. pl. 6. April 1905.) 



A description (with plate) of B. Underwoodianiim sp. nov., from 

 Jamale a, a specitts related to the Jamale an B. Jenmani and the 

 Mexican B. decompositiun. Maxon. 



Maxon, William Ralph, A New Species of Fern of the 

 Genus Polypodiiim from Jamaica. (Smithsonian Mis- 

 cellaneous Collections: Quarterly Issue. XLVI. p. 10, 411. 

 pl. 57. April 5, 1905.) 



Polypodiiim nesioticum n. sp., a simple-leaved species from Ja- 

 maica, is described and figured. Its nearest Jamaican allies are P. 

 trifurcatum L.. and the rare P. Fawcettii Baker and P. dendricoiiim 

 Jenman. With the two latter it is compared in detail. Maxon. 



