56 The Ohio Naturalist. [Vol. X, No. 3, 



Pteridophyta Homosporeae. 

 Filices. 



Polypodiaceae. 



Polypodium vulgare L. Polypody. (Ec.) Horn.) Rhizome and 



leaves . 

 Adiantum pedatum L. Maiden-hair Fern. (Ec.) (Horn.) Plant. 

 Pteridium aquilinum Kuhn. {Pteris aquilina L.) Brake. (Ec.) 



Plant. 

 Asplenium trichomanes L. Spleenwort. (Ec.) Plant. 

 Asplenium ruta-muraria L. tVhite maiden-hair. (Ec.) Plant. 

 Asplenium filix-foemina (L.) Bernh. Lady-Fern. (Ec.) Rhizome. 

 Dryopteris marginalis (L.) A. Gr. Marginal Shield-fern. (Ec.) 



Rhizojjie. 

 Dryopteris filix-mas (L.) Schott. Male Fern. (U. S. P.) (Ec.) 



Rhizome. 



Osmundaceae. 



Osmunda regalis L. Royal Flowering-fern. (Ec.) Rhizome. 

 Osmunda cinnamomea L. Cinnamon-fern. (Ec.) Rhizome. 



Equisetaceae. 



Equisetum arvense L. Field Horse-tail. (Ec.) (Hom.) Plant. 

 Equisetum laevigatum A. Br. Smooth Scouring Rush. (Ec.) 



Plant. 

 Equisetum hyemale L. Scouring Rush. (Ec.) (Hom.) Plant. 

 Equisetum robustum A. Br. (Ec.) Plant. 



Lycopodiaceae. 



Lycopodium clavatum L. and other species of Club Moss. (U. S. 

 P.) (Ec.) (Horn.) Spores. 



GYMNOSPERMAE. 



Coniferae. 



Pi]iaccae. 



Pinus sylvestris L. Scotch Pine. (U. S. P.) (Hom.) Leaves and 



young tzvigs. Distillation of wood. 

 Larix laricina (Du Roi) Koch. (L. americana Mx.) American 



Larch. (Ec.) (Hom.) Bark. 

 Picea excelsa (L.) Karst. {Abies excelsa Karst.) Norway Spruce 



cult. (Horn.) Leaves and young twigs. 

 Tsuga canadensis (L.) Carr. {Abies canadensis Mx.) Hemlock. 



(Ec.) (Hom.) Sap. 

 Thuja occidentalis L. Arbor Vitae. (Ec.) (Hom.) Twigs and 



leaves. % 



Juniperus communis L. Common Juniper. (Ec.) (Hom.) Fruit. 

 Juniperus virginiana L. Red Cedar. (Hom.) (Ec.) Leaves and 



twigs. 



