knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 93 
Dryopteris (Lastrea) polypodioides? (Ett.) n. comb. 
Lastrea (Goniopteris) polypodioides? (Ett.) Lesquereux. Tert. Fl., p. 57, 
pi. iv, f. 11, 12, 1878. 
Goniopteris polypodioides Ett. Lesquereux. Ann. Rept. U. S. Geol. and 
Geogr. Surv. Terr., p. 394, 1873 [1874]. 
Laramie group : Sand Creek, Colorado. 
Dryopteris virginica (Font.) n. comb. 
Aspidium virginicum Font. Potomac FL, p. 97, pi. xv, f. 7 ; xxi,f. 14. 
Potomac formation : Near Potomac Run and near Brooke, Virginia. 
Dryopteris sp. 
Aspidium sp., Kn. Bull. Geol. Soc. Am., vol. viii, p. 140, 1897. 
Laramie group ? : North Fork Dutton Creek, Wyoming. 
ECHITONIUM Unger. Syn. PL Foss., p. 230, 1845. 
Echitonium Sophiae O. Web. Paheontogr., vol. ii, p. 187, pi. xx, f. 
17, 1852; Lx., Am. Journ. Sci., vol. xlv, f. 206, 1868; Proc. U. IS. Nat. 
Mus., vol. x, p. 41, 1887. 
Laramie group?: Marshall s, Colorado. 
1: White River, Dakota. 
EL-ffJAGNUS (Tournefort) Linnaeus. Syst., ed. i, 1735. 
Elaeagnus inasqualis Lx. Am. Journ. Sci., vol. xxvii, p. 364, 1859; 
Geol. Tenn., p. 428, pi. K, f. 7, 1869. 
Pleistocene f : Somerville, Fayette County, Tennessee. 
EL-ffiODENDRON Jacques f. Nova Acta Helv., vol. i, p. 36, 1787. 
Elaeodendron helveticum Heer. Fl. Tert. Helv., vol. iii, p. 71, pi. 
cxxii, f. 5, 1859; Lx., Proc. U. S. Nat. Mus., vol. v, p. 449, 1882 
[1883]. 
Eocene?: Unga Island, Alaska. 
Elaeodendron polymorphum Ward. Ball. U. S. Geol. Surv., no. 37, 
p. 84, pi. xxxviii, f. 1-7, 1887. 
Fort Union group : Burns Eanch, Montana. 
Elaeodendron serrulatum Ward. Bull. U. S. Geol. Surv., no. 37, p. 
83, pi. xxxvii, f. 3-5, 1887. 
Fort Union group: Burns Eanch and Seven-Mile Creek, Montana. 
Elaeodendron speciosum Lx. Fl. Dak. Gr., p. 175, pi. xxxvi, f. 2, 3, 
1892. 
Dakota group : Kansas. 
ELODEA Michaux. Fl. Bor. Am., vol. i, p. 20, 1803. 
Elodea canadensis ? Mx. Penhallow, Bull. Geol. Soc. Am., vol. i, p. 
325, 1890. 
Pleistocene : Rolling River, Manitoba. 
EMBOTHRITES Unger. Gen. et Sp. PL Foss., p. 428, 1850. 
Embothrites ? daphneoides Lx. Cret. and Tert, FL, p. 51, 1883. 
Embothrium ? daphneoides Lx. Cret. FL, p. 87, pi. xxx, f. 10, 1874. 
Dakota group : Kansas. 
Embothrium ? daphneoides Lx. = Embothrites f daphneoides. 
