knowlton] TERTIARY PLANTS OF NORTH AMERICA. 99 
FEILDENIOPSIS Fontaine. Potomac PL, p. 204, 1889. 
Feildeniopsis crassinervis Font. Potomac Fl., p. 205, pi. lxxxvi, 
f. 5, 1889. 
Potomac formation : Kankeys, Virginia. 
FICOPHYLLUM Fontaine. Potomac FL, p. 290, 1889. 
Ficophyllum crassinerve Font. Potomac FL, p. 291, pi. cxliv, f. 3; 
cxlv, f. 3; cxlvi, f. 1; cxlvii, f. 4; cxlviii, f. 1, 2, 4; clvii, f. 4; clxxiii, 
f. 10, 1889. 
Potomac formation: Fredericksburg, near Dutch Gap Canal, Deep 
Bottom, Virginia. 
Ficophyllum eucalyptoides Font. Potomac FL, p. 294, pi. clxiv, 
f. 1, 2, 1889. 
Potomac formation : Near Brooke, Virginia. 
Ficophyllum serratum Font. Potomac FL, p. 294, pi. cxlv, f. 2 ; cxix, 
f. 9, 1889. 
Potomac formation: Fredericksburg, Virginia. 
Ficophyllum tenuinerve Font. Potomac FL, p. 292, pi. cxl, f. 3; cxli, 
f. 2; cxlx, f. 1, 4; cxlvii, f. 2; cxlix, f. 1, 3, 5: clvi, f. 1, 1889. 
Potomac formation: Near Potomac Bun and Fredericksburg, Vir- 
ginia. 
FICUS Tournefort ex Linmeus. Syst., ed. v, 1735. 
Ficus aligera Lx. Fl. Dak. Gr., p. 84, pi. x, f. 3-6, 1892. 
Dakota group : Cloud County, Kansas. 
Ficus alkalina Lx. Cret. and Tert. FL, p. 164, pi. xliv, f. 7-9, 1883. 
Green Biver group : Alkali Station, Wyoming. 
Ficus alaskana Newby. Proc. U. S. Nat. Mus., vol. v, p. 512, 1882 
[1883J. 
Eocene'?: Cook Inlet and Admiralty Inlet, Alaska. 
Ficus Andraei Lx. Bull. Mus. Comp. ZooL, vol. xvi, p. 50, 1888. 
Denver group: Golden, Colorado. 
Ficus? angustata Lx. Cret. and Tert. FL, p. 47, 1883. 
Dakota group : Bluff Creek, Kansas. 
Ficus appendiculata Heer. FL Tert. Helv., vol. ii, p. 67, pi. Ixxxv, 
f. 12, 13, 1856; Lx., Proc. U. S. Nat. Mus., vol. xi, p. 31, 1888. 
Eocene?: Lassen County, California. 
Ficus arenacea Lx., ex. p.=Ficus lanceolata. 
Ficus arenacea Lx., ex. p. = Ficus uncata. 
Ficus arenacea brevipetiolata Lx.=Ficus uncata. 
Ficus artocarpoides Lx. Cret. and Tert. FL, p. 227, pi. xlvii, f. 1-5, 
1883. 
Fort Union group : Bad Lands, Dakota. 
