362 Pteridophyten. 



o{ the climital and topographic in^luences. Ecological conditions are 

 very diverse. In the northwestern portion the Olympic mountains 

 have an average rainfall of about 92 inches on their western slope and 

 consequently support a most luxuriant growth of ferns, including such 

 types as Atliyritim cyclosonim, Lomaria spicant, Polypodium falcatum 

 and Nephrodium splnulosum dilatatiim ; and on the higher peaks (5000 

 — 6000 feet) Polystichuin lonchitis, Polypodium hesperlnm, Asplcniiim 

 Trichomanes, Cystopteris fragilis, Cryptogramme acrostichoides and 

 Cheilanthes gracillima. Eastern Washington has, however, a rain- 

 fall of only 14 inches, and certain species (notably Woodsia Oregana, W. 

 scopiilina and Cheilanthes lanuginosa) which are not found west of the 

 Cascade Mountains occur here. The fern flora of the high peaks 

 of the Cascades is similar to that of the Olympics, and includes 

 several additional species, viz. Pellaea densa, Gymnogramma triangii- 

 laris, Aspleniiim viride, Nephrodium montaniim and several Polysticha. 

 For the entire State six species and two subspecies of Isoeies are recorded. 



William R. Maxon (Washington). 



Fitzpatrick, T. J. and Fitzpatrick, M. L. F., The Fern Flora 

 of Iowa. (The Fern Bulletin. Vol. XL Jiilv 1903. p. 65 

 -71.) 



An annotated list of the 47 species of Pteridophyta known to occur 

 in the srate of Iowa, prefaced by a brief account of the geology and 

 topography of the region. Except for a small „driftless area" in the 

 northeastern portion the entire State was subjected to glaciation, the 

 present topography being „prevailingly that of the drift period with the 

 changes effected by subsequent erosion". The wooded bluffs along the 

 Mississippi River, with numerous intersecting ravines and various 

 rock-exsposures, offer most favorable conditions; and the „bulk of the 

 species is limited to the eastern half of the State". Certain species 

 common in the eastern states reach in Iowa their western limit. Isolated 

 stations are taken to indicate the existence of a richer fern-flora within 

 comparatively recent times. William R. Maxon (Washington). 



Gilbert, B. D., A New Fern from Bermuda. (The 



American Botanist. Vol. !V. May 1903. p. 86—87.) 



Description of Asplenium muticum n. sp. from material collected 

 by the author in Bermuda and Florida and referred mistakenly to 

 A. anceps. William R. Maxon (Washington). 



Gilbert, B. D., Asplenium muticum. (The Fern Bulletin. Vol. XI. 



july 1903. p. n—79.) 



Further notes on the author's A. muticum, recently published. The 

 species is easily distinguished from A. Trichomanes. Its characters may 

 be compared rather with those of A parvuluni M. and G., to which 

 species it is more or less closely allied. The author believes that con- 

 fusion exists as to the proper application of the names A. parvulum M. 

 and G. and A. resiliens Kunze, and he is inclined to believe that these 

 names may be found to apply to two different forms within the United 

 States. William R. Maxon (Washington). 



Gilbert, B. D., Two New Varieties of the Ternate 



Botiychium. (The Fern Bulletin. Vol. XI. July 1903. p. 88 



—89.) 



Descriptions of two new Botrychia from central New York, viz. 

 B. obliquuin Habereri Gilbert and B. obliquum elongatum Gilbert and 



