398 GRAMINE.E; EQUISETACEiE ; FILICES. 



Latin Names. English Names. Geolog'l Station. Natural Habitat. 



Orthopogon, R. Br. 



*0. parvifolius, Nutt., Nutt. Cat. 



Cenchrus, L.,. . . Burr grass. 



*C. tribuloides, L., Sandy banks. 



Rottboellia, R. Br. 



*R. campestris, Nutt., Plains of Red River. 



Tripsacum, L., . . Gama grass. 



*T. dactyloides, L., Moist soil. 



Erianthus, Mich., . . Yellow Beard grass. 



*E. alopecuroides, Ell., . . . . . Sandstone, . Barrens. 



Andropogon, L., . . Beard grass. 



A. furcatus, Muhl., . . . Dry prairies. 



A. scoparius, Mich., " " 



A. Virginicus, L., Sand and clay, . " " 



*A. macrourus, Mich., ...... " . Low ground. 



*A. filiforme, Nutt., Shrubby plains. 



*A. ambiguura, Mich., Open woods. Cadron R. 



Sorghum, Pers., . . Broom Corn. 



S. nutans, Gray, 1 Sandy, . . Dry prairies. 



Eqiiisetum, L., 

 E. hyemale, L., 2 



Equisetacese. Horsetail Family. 



. Horsetail. 

 Sand, 



Banks of the rivers. 



Polypodium, L. 



P. vulgare, L., 



P. incanum, Willd., 



Allosorus, Bern., . 



A. atropurpureus, Gray, 



Pteris, L., 



P. aquilina, L., 



Adiantum, L., 



A. pedatum, L., 



A. capillus-Veneris, L., . 



Cheilanthes, Swartz, 



C. vestita, Willd., . 



C. tomentosa, Link., 



C. Alabamensis, Kuntz 



Woodwardia, Smith. 



*W. Virginica, Willd., 



Camptosorus, Link., 



C. rhizophyllus, Link., 



Filices. Ferns. 



Sandstone, 



Rock brake. 

 Brake. 



Maiden hair. 



Lop fern. 



Walking leaf. 



Limestone 



Limestone 



Sand, 



Limestone 



Shady rocks. 



On trees and rocks. 



. Rocks. 



. Rocky hills and prairies. 



. Shaded rocks. Rich woods. 



. Rocks near springs. 



. Rocks. 



. Rocky ridges. 



. Hot springs. 



Swamps. 



Shaded mossy rocks. 



1 So hard and siliceous is this species, and also the Beard-grass species, that their culms are not 

 destroyed by the fires of the prairies 

 3 Used for scouring. 



