Proceedings of the Ohio State Academy of Science. 289 



the petiole. Leaves 6-12 inches long. Indusiiim distinct split- 

 ting- into jagged lobes. On rocks. Apparently common in the 

 southern half of the state. 



17. Dennstaedtia Bernh. 



Large beautiful ferns with 2-3-pinnatifid leaves and small, 

 globular, marginal or submarginal sori with membranous, cup- 

 shaped, inferior indasia, which open at the top. Veins free. 

 {Dicksonia.) 



I. Dennstaedtia pnnctilobida (Mx.) Moore. B'oulder Fern. 



Rhizome creeping, not chaffy ;, leaves usually two feet long 

 or more, thin and delicate, minutely glandular and pubescent ; 

 petiole pale green, stout, chafifless, and sweet-hay-scented, usually 

 producing "leaf shoots" at its base. Growing under various 

 conditions, especially on open hillsides. In the southern and 

 eastern parts of the state. (Erie Co. Moseley Herb.) 



18. Matteuccia Todaro. 



Large ferns with erect rhizomes and large leaves in a crown. 

 Sporophylls unlike the foliage leaves. Veins free. (Onoclea.) 



I. Matteuccia struthiopteris (L.) Todaro. Ostrich Fern. 



Rhizome stout and ascending, bearing a circle of sterile 

 leaves with one or more sporophylls within. Leaves 2-6 feet 

 high, bipinnatifid ; sporophylls simply pinnate, the pinnae lobed. 

 In moist thickets, especially along streams. Cuyahoga county. 

 (Erie Co. Moseley Herb.) 



19. Onoclea L. 



Coarse ferns with slender creeping rhizomes with leaves 

 growing separately. Sporophylls unlike the foliage leaves. 

 Veins forming small areolae. 



