2IO The Ohio Naturalist [Vol. V, No. 1, 



FiLix BULBiFERA (L.) Underw., (Cystopteris btilhifera (L.) 

 Bernh.) Bladder-fern. — Adams, Ashtabula, Champaign, Clark. 

 Clermont, Cuyahoga, Fairfield, Franklin, Highland, Hocking, 

 Licking, Summit. 



FiLix FRAGiLis (L.) Undcrw., (Cystopteris frae^ilis (L.) Bernh.) 

 Brittle-fern. — Ashtabula, Auglaize, Clark, Clermont, Clinton, 

 Fairfield, Franklin, Green, Hamilton, Hancock, Hardin, Huron, 

 Knox, Lake, Lorain, Portage, Wayne. 



WooDsiA OBTUSA (Sprcng.) Torr. — Clark, Fairfield, Green, 

 Jackson, Lawrence, Perry, Scioto. 



Denxst^dtia PUNCtiLOBULA (Michx.) Moore, (Dicksonia 

 punctilohula (Michx.) Gray, D. pilosiuscula Willd.) Hay-scented 

 fern. — -Ashtabula, Cuyahoga, Hocking, Miami, Scioto. 



OxocLEA SEXsiBiLis L., Sensitive fern. — Ashtabula, Auglaize, 

 Belmont, Champaign, Clermont, Clinton, Delaware, Erie, Fair- 

 field, Fulton, Gallia, Hardin, Hocking, Huron, Jackson, Jefferson, 

 Knox, Lucas, Madison, Medina, Morrow, Ottawa, Seneca, Stark, 

 Summit, Vinton, Warren, Wayne, Williams, Wood, Wyandot. 



since this article was sent to press, sneciniens of Mateuccia struthiopteris (I,.) Todd, 

 have been received from L !)■ .Stair of Cleveland. 



Will you kindlv send specimens of every species of your 

 Countv not noted in the above list as alreadv in the State Her- 

 barium? They will be incorporated in the collection to the credit 

 of the donors and collectors. Unusual forms and abundant 

 material of the rarer species are especially solicited. Photo- 

 graphs of plants of any species in their natural habitats will be 

 mo.st welcome, and will be filed in the State Herbarium along with 

 the specimens. 



LEAF EXPANSION OF TREES AND SHRUBS IN 1904. 



John H. Schaffner. 



During the past spring an accurate record was kept of the 

 time of appearance, at Columbus, of the leaves of our common 

 native and cultivated woody plants. The results are given 

 below. The spring was unusually cold and late so that the actual 

 time of leafing is not to be taken as representing the usual date 

 for this locality. 



The trees were listed when the leaves began to break through 

 the bud and became definitely distinguishable as leaves. In 

 some species the leaf is nearly expanded in a day or two after this 

 and the tree looks quite leafy, while in others the development 

 is very slow. There is also much difference in individuals, even 

 those standing side by side and apparently with the same environ- 

 ment. Ulmus americana showed bursting'buds on April 30 in 

 isolated individuals; but the last trees were just coming out on 



