2 lO 
The Ohio Naturalist. 
[Vol. V, No. 1, 
Filix bulbifera (L.) Underw., {Cystopteris hulhifera (L.) 
Bernh.) Bladder-fern. — Adams, Ashtabula, Champaign, Clark, 
Clermont, Cuyahoga, Fairfield, Franklin, Highland, Hocking, 
Licking, Summit. 
Filix fragilis (L.) Underw., (Cystopteris frapilis (L.) Bernh.) 
Brittle-fern. — Ashtabula, iVuglaize, Clark, Clermont, Clinton, 
Fairfield, Franklin, Green, Hamilton, Hancock, Hardin, Huron, 
Knox, Lake, Lorain, Portage, Wayne, 
WooDsiA OBTUSA (Spreng.) Torr. — Clark, Fairfield, Green, 
Jackson, Lawrence, Perry, Scioto. 
Dennst.edtia punctilobula (Michx.) Moore, (Dicksonia 
punctilolmla (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, Jeffenson, 
Knox, Lucas, Madison, Medina, Morrow, Ottawa, Seneca, Stark, 
Summit, Vinton, Warren, Wayne, Williams, Wood, Wyandot. 
Since this article w.^s sent to press, specimens of Mateuccia struthiopteris (ly.l Todd, 
have been received from L D Stair of Cleveland. 
Will you kindly send specimens of every species of your 
County not noted in the above list as already 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 
most 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 
lielow. 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 verv 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 
