knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 25 
Abietites setiger Lx. Tert. FL, p. 82, pi. vii, f. 17, 18, 1878. 
Abies setiger Lx. Ann. Ropt. U. S. Geol. and Geogr. Surv. Terr., p. 404, 1872 
[1873], Probably rootlets. 
Abietites Tyrrellii Dii. Trans. Roy. Soc. Canada, vol. iii, sec. iv, 
p. 17, 1885 [1886]. 
Fort Pierre: Berry Creek, Northwest Territory. 
Abietites sp., Font. Proc. U. S. Nat. Mus., vol. xvi, p. 277, pi. xliii, f. 
4, 1893. 
Trinity division : Glenrose, Texas. 
Abietitis sp., Font. In Diller and Stanton, Bull. Geol. Soc. Am., vol. 
5, p. 450, 1894. 
Knoxville beds: Tehama County, California. 
ACACIA Adanson. Fain., pi. ii, p. 319, 1763. 
Acacia oregoniana Lx. Proc. U. S. Nat. Mus., vol. xi, p. 14, pi. v. f. 
4, 1888. 
Miocene: John Day Valley, Oregon. 
Acacia septentrionalis Lx. Ann. Kept. U. S. Geol. and Geogr. Surv. 
Terr., p. 418, 1873 [1874] ; Tert. FL, p. 299, pi. lix, f. 9, 9a, 1878. 
Green River group : Castello's ranch, Colorado. 
ACACI-ffiPHYLLUM Fontaine. Potomac FL, p. 279, 1889. 
Acaciaephyllum longifolium Font. Potomac FL, p. 279, pi. cxxxvii, 
f.6; exxxviii, f. 1-3, 1889. 
Potomac formation : Dutch Gap Canal, Virginia. 
Acacicephyllum microphyllum Font. Potomac FL, p. 280, pi. 
exxxviii, f. 5, 1889. 
Potomac formation : Near Dutch Gap Canal, Virginia. 
Acaciaephyllum spatulatum Font. Potomac FL, p. 280, pi. exxxviii, 
f. 4, 6-9, 1889. 
Potomac formation : Dutch Gap Canal, Virginia. 
Acacicephyllum variabile Font. Potomac FL, p. 281, pi. clxx, f. 7, 
1889. 
Potomac formation : Baltimore, Maryland. 
ACER (Tournefort) Linnaeus. Gen. pi., p. 112, 1737. 
Acer cequidentatum Lx. Tert. FL, p. 262, pi. xlviii, f. 1, 3, 1878; 
Mem. Mus. Comp. Zool. vol. vi, p. 26, pi. vii, f. 4, 5, 1878. 
Laramie group % : Carbon, Wyoming. 
Miocene: Auriferous gravels, California. 
Green River group!: White and Green rivers. 
Acer amboyense Newby. FL Amboy Clays, p. 106, pi. xlvi, f. 5-8, 
1895 [1896]. 
Amboy clay: Woodbridge, South Amboy, New Jersey. 
Acer arcticum Heer. FL Foss. Arct., vol. iv, abt. i, p. 86, pi. xxii; 
xxiii; xxiv, f. 1, 2; xxv, f. 1-3, 1877; Lesquereux, Mem. Mus. Comp. 
Zool., vol. vi, p. 60, 1878. 
Fort Union group : Bad Lands, Dakota. 
Miocene : Oregon Creek, 20 miles north of Chalk Bluffs, California. 
