knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 173 
Podozamites emarginatus Lx. = Dammarites emarginatus. 
Podozamites grandifolius Font. Potomac PL, p. 180, pi. lxxxiii, f. 2; 
lxxxiii, f. 5, 1889. 
Potomac formation: Fredericksburg, and near Potomac Run, 
Virginia. 
Podozamites Haydenii Lx. Oret. and Tert. Fl., p. 27, 1883. 
Pterophyllum Haydenii Lx. Am. Journ. Sci., vol. xlvi, p. 91, 1868; Cret. FL, 
p. 49, pi. i, f. 6, 6b, 1878. 
Dakota group : Decatur, Nebraska. 
Podozamites lanceolatus (L. and H.) Schimp. Pal. Veg., vol. ii, p. 
160, 1870; Lx., Fl. Dak. Gr., p. 28, pi. i, f. 5, 6, 1891; Dn., Trans. Roy. 
Soc. Canada, vol. iii, sec. iv, p. 6, pi. i, f. 3, 1885 [1886]. 
Zamia lanceolata L. and H. Foss. Fl., vol. iii, pi. 193, 1836. 
Kootanie: Martin Creek; Kootanie Pass., etc, British Columbia. 
Dakota group: Kansas. 
Podozamites latipennis Heer. Fl. Foss. Arct., vol. vi, abt. ii, p. 42, 
pi. xiv, f. 1-9; xv, f. 2a, 3b, 1884; Weed, Bull. Geol. Soc. Am., vol. 
iii, p. 323, 1892. [Doubtful.] 
Kootanie: Sun River, Montana. 
Podozamites marginatus? Heer. Fl. Foss. Arct., vol. vi., abt. ii, p. 
43, pi. xvi, f. 10, 1882 ; Fl. Amboy Clays, p. 44, pi. xiii, f. 5, 6, 1895 [1896]. 
Amboy clay : Woodbridge, New Jersey. 
Podozamites nervosa Newby. Am. Journ. Sci., vol. xli, p. 200, pi. 
xiv, f. 6, 1891. 
Kootanie: Great Falls, Montana. 
Podozamites oblongus Lx. Cret. and Tert. Fl., p. 28, pi. i, f. 10, 11. 
Dakota group : Kansas. 
Podozamites pedicellatus Font. Potomac Fl., p. 180, pi. lxxvi, f. 1; 
lxxviii, f. 7 ; lxxxii, f. 5, 1889. 
Potomac formation: Fredericksburg, Virginia. 
Podozamites pradongus Lx.=Dammarites caudatus. 
Podozamites stenopus Lx. Fl. Dak. Gr., p. 27, pi. i, f. 7, 1891. 
Dakota group : Kansas. 
Podozamites subfalcatus Font. Potomac Fl., p. 179, pi. lxviii, f. 6; 
clxx, f. 9, 1889. 
Potomac formation : Near Brooke, Virginia. 
Podozamites tenuinervis Heer. Fl. Foss. Arct., vol. vi., abt. ii, p. 
44, pi. xvi, f. 9, 1882; Newby., Bull. Torr. Bot. Club, vol. xiii. p. 35, 
1886. 
Amboy clay : New Jersey. 
Podozamites sp., Font. Proc. U. S. Nat. Mus., vol. xvi, p. 267, pi. 
xxxvi, f. 8, 1893. 
Trinity division : Glenrose, Texas. 
Pollen sacs? Font. Potomac FL, p. 272, pi. cxxxvi, f. 7, 1889. 
Potomac formation: Virginia. 
POLYPODIUM (Tournefort) Linnaeus. Gen. Pi., p. 322, 1737. 
Polypodium dentatum Font. Potomac FL, p. 105, pi. xxii, f. 4, 5, 1889. 
Potomac formation : Fredericksburg, Virginia. 
