knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 237 
Undetermined fern Font. Potomac Fl., p. 119, pi. xxi, f. 12, 1889. 
Potomac formation: Near Dutch Gap Canal, Virginia. 
Undetermined fern in circinate vernation sp., Font. Potomac Fl., 
p. 145, pi. lix, f. 5, 1889. 
Potomac formation: Near Potomac Bun, Virginia. 
Undetermined plant (a) Font. Potomac Fl., p. 274, pi. cxxxvi, f. 13, 
1889. 
Potomac formation : Fredericksburg. Virginia. 
Undetermined plant (b) Font. Potomac Fl., p. 274, pi. cxxxvi, f. 14, 
1889. 
Potomac formation: Fredericksburg, Virginia. 
Undetermined plant (c) Font. Potomac Fl., p. 275, pi. cxxxvii, f. 1, 
1889. 
Potomac formation : Fredericksburg, Virginia. 
Undetermined plant (d) Font. Potomac Fl., p. 275, pi. cxxxvii, f. 2, 
3, 1889. 
Potomac formation : Fredericksburg, Virginia. 
Undetermined plant (e) Font. Potomac Fl., p; 275, pi. cxxxvii, f. 4, 
1889. 
Potomac formation: Fredericksburg, Virginia. 
Undetermined plant (/) Font. Potomac Fl., p, 275, pi. cxxxvii, f. 5, 
1889. 
Potomac formation : Fredericksburg, Virginia. 
Undetermined plant (g) Font. Potomac Fl., p. 275, pi. clxix, f. 4, 5, 
1889. 
Potomac formation: Baltimore, Maryland. 
Undetermined plant (h) Font. Potomac Fl., p. 276, pi. clxix, f. 9, 
1889. 
Potomac formation : Baltimore, Maryland. 
Undetermined plant (i) Font. Potomac Fl., p. 276, pi. clxxiii, f. 11, 
1889. 
Potomac formation : Baltimore, Maryland. 
VACCINOPHYLLUM Dawson. Trans. Boy. Soc. Canada, vol. viii, 
sec. iv, p 88, 1890. 
Vaccinophyllum quasstum Dn. Trans. Boy. Soc. Canada, vol. viii, 
sec. iv, p. 88, f. (in text) 23, 1890. 
Eocene?: Similkameen Biver, British Columbia. 
VACCINIUM Linnreus. Syst., ed. i, 1735. 
Vaccinium coloradense Lx. Proc. U. S. Nat Mus., vol. x, p. 42, pi. 
iii, f. 4, 5, 1887. 
Denver group : Silver Cliff, Colorado. 
Vaccinium Friesii Heer. Fl. Foss. Alask., p. 35, pi. viii, f. 4, 1869. 
Eocene?: Port Graham, Alaska. 
Vaccinium reticulatum Al. Br. in Stizeuberger. Verzeichniss, p. 
82, 1851; Lx., Tert. FL, p. 235, pi. lix, f. 6, 1878. 
Eocene?: Cook Inlet, Alaska. 
Green Biver group : Florissant, Colorado. 
