knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 27 
Acer secreta Lx. Ann. Kept. U. S. Geol. and Geogr. Surv. Terr., 
1871, suppl., p. 12, 1871 [1872.] [Not afterwards mentioned by 
author.] 
Laramie f: Evanston, Wyoming. 
Acer spicatum Lam. Dn., Can. Nat., vol. iii, new ser., p. 71, 1868 = A. 
saccliarinum Wang. 
Acer trilobatum? (Sternb.) Al. Br. Neues Jahrb. f. Miu. 1845, p. 
1 72, 1815; Lesquereux, Am. Journ. Sci., vol. xxvii, p. 3G1, 1859; Ann. 
Kept. U. S. Geol. and Geogr. Surv. Terr., p. 293, 1871 [1872]. 
Pliyllites trilobatus Strenbg. Fl. &., Vorwelt, Index Icomim, pi. 1, f. 2, 1825. 
?: Belliugham Bay. 
Laramie group: Evanston, Wyoming. 
Acer trilobatum productum? (Al. Br.) Heer. El. Tert. Helv., vol. 
iii, p. 50, pi. cxiv, f. 1, 4-8, 1859 ; Lx., Ann. Kept. U. S. Geol. and Geogr. 
Surv. Terr., p. 388, 1872 [1873]; Tert. Fl., p. 261, pi. xlviii, f. 2, 3a, 
1878. 
Acer trilobatum Al. Br. Lx., Ann. Kept., op. cit., p. 408, 1873 [1874]. 
Denver group ?•. Sedalia, Colorado. 
Laramie group?: Carbon, Wyoming. 
Acer trilobatum productum Al. Br. Lx. Cret. and Tert. Fl., p. 258 = 
Acer Bendirei. 
Acer trilobatum tricuspidatum (Al. Br.) Heer. Fl. Tert. Helv., vol. 
iii, p. 49, pi. cxiii, f. 3-10, 1859; Ward, Bull. U. S. Geol. Surv., no. 37, 
p. 60, pi. xxix, f. 3, 4, 1887. 
Acer tricuspidatum Al. Br. Neues Jahrb. f. Min., p. 172, 1845. 
Fort Union group: Clear Creek and Little Missouri, Montana. 
Acer vitifolium Al. Br. Neues Jalirb. f. Min., 1845, p. 172, 1845; 
Lesquereux, Proc. U. S. Nat. Mus., vol. x, p. 44, 1887. 
Pleistocene?: Wytlieville, Virginia. 
Acer, branches of, Lx. Proc. U. S. Nat. Mus., vol. xi, p. 15, 1888. 
Miocene : John Day Valley, Oregon. 
Acer, fruits of, Lx. Proc. U. S. Nat. Mus., vol. xi, p. 15, pi. vi, f. 2, 3; 
pi. vii, f. 2, 1888. 
Miocene: John Day Valley, Oregon. 
Acer, fruit of, Dn. Trans. Roy. Soc. Canada, vol. viii, sec. iv, p. 87, 
f. (in text) 20, 1890. 
Eocene?: Stump Lake, British Columbia. 
Acer sp., Lx. Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., p. 286, 
1871 [1872]. [Not afterwards mentioned by Lesquereux.] 
Eocene'?: Barrell Springs, Wyoming. 
Acer sp., Lx. Cret. and Tert. Fl., p. 181, pi. xxxvi, f. 7, 8, 1883. 
Green River group: Florissant, Colorado. 
Acer sp., Lx. Mem. Mus. Comp. Zool., vol. vi, no. 2, p. 61 (app.), 1878. 
Miocene: Oregon Creek, 20 miles north of Chalk Bluff's, California. 
ACERIPHYLLTJM Fontaine. Potomac FL, p. 320, 1889. 
Aceriphyllum aralioides Font. Potomac Fl., p. 321, pi. clxiii, f. 8, 
1889. 
Potomac formation: Virginia. 
