80 



GEOLOGY OP OHIO. 



SYNOPSIS OF VEGETABLE KINGDOM, 

 Angiosperms 



Phenogams 

 (flowering plants) 



{Dicotyls — Ex. — Anemone, Cockle-bur, 

 Mint, Deciduous Trees. 

 Monocotyls — Ex. — Lily, Flag, Grasses. 



Gymnosperms 



Cryptogams 

 (flowerless plants) 



Vascular cryptogams 



Bryophytes 



.Thallophytes 



f Cycads — Ex. — Cycas, Zamia. 



-J Conifers — Ex. — Pines, Cedars, Firs. 



(. Gnetaceae — Ex. — Welwitschia. 



' Club-mosses — Ex.—Ground pine, Lyco- 



pods. 

 Horse-tails — Ex. — Scouring rushes, 



Equisetum. 

 Ferns — Ex. — Maiden hair, Brake, 



Wood-fern. 



f Mosses — Ex. — Mosses. 



\ Liverworts — Ex. — Liverworts. 



'Fungi — Ex. — Mushrooms, Rusts, 

 Lichens, Mildews, Yeast-plants. 



Algse — Ex. — Green Pond Scums, Des- 

 mids, Sea-weeds. 



Bacteria — Ex. — Micro-organisms of de- 

 cay, fermentation, disease, etc. 



Diatoms — Ex. — Diatoms in fresh and 

 salt water. 



Slime Moulds— Ex.— " Flowers of tan," 

 Parasite of Clubfoot, etc. 



NOMENCLATURE AND ACKNOWLEDGEMENTS. 



In respect to nomenclature, this can be said; that an attempt has 

 been made to conform to the principles that American and other botanists 

 are now adopting. But it must not be presumed that in the yet unsettled 

 state in the application of strict priority, accuracy has been in all cases 

 attained. The most recent contributions of Dr. N. L> Britton and others 

 in this line have been followed as far as the literature could be made 

 available. The sequence of orders followed by Engler & Prantl, authors 

 of Pflanzen-familien is here adopted. This appropriately displaces 

 the arrangement of De Candolle, nearly a century old, very antiquated 

 and far from natural, though still persisting in the text books. 



Thanks are hereby expressed to the various collectors in the state 

 who have favored us with material and to those botanists who have 

 kindly examined and compared specimen.s for us. The plant lists or 

 catalogues above enumerated have been consulted (the state catalogues 

 of Dr. Newberry and Dr. Beardslee especially being used) and 

 where species are given on their authority, credit in each case has been 

 given. 



Finally, the authors would respectfully request collectors to send 

 specimens to the Herbarium of the Ohio State University, particularly of 

 new or rare plants and also those that will extend the known area of dis- 

 tribution over the state or that will illustrate varieties due to local or 

 other causes. Such material will serve as a basis for future contributions 

 to the botany of our state. 



Botanical Laboratory, Ohio State University, January, 1893. 



