knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 77 
Corylus MacQuarrii (Forbes) Heer. Urwelt d. Schweiz, p. 321, 1865. 
Alnites? M'Quarrii Forbes. Quat. Journ. Geol. Soc., vol. vii, p. 103, pi. iv, f. 3, 
1851. 
Eocene?: Alaska, Mackenzie River. 
Fort Union: Montana; Porcupine Creek, British Columbia. 
Laramie group ? : Carbon, Wyoming. 
Corylus MacQuarrii macrophylla Heer. PL Foss. Arct., vol. i, p. 
105, 1868 j vol. ii, abt. ii (Fl. Foss. Alask.), p. 30, pi. iv, f. 6. 7, 1869. 
Eocene?: Alaska. 
Corylus orbiculata Newby. Later Extinct Floras, p. 58, 1868. 
Fort Union group : Fort Union, Dakota. 
Corylus rostrata Ait. Hort. Kew., vol. iii, p. 364, 1789; Newby., Later 
Extinct Floras, p. 60, 1868. 
Fort Union group: Seven-Mile Creek, Montana; Fort Union, 
Dakota. 
Canadian Upper Laramie : Porcupine Creek. 
CRAT-ffiG-US (Tournefort) Linnaeus. Syst., ed. i, 1735. 
Crataegus acerifolia Lx. Cret. and Tert. FL, p. 198, pi. xxxvi, f. 10, 
1883. 
Green River group : Florissant, Colorado. 
Crataegus aceroides Lx. Fl. Dak. Gr., p. 143, pi. liv, f. 8; pi. Iv, f. 1, 
1892. 
Dakota group : Kansas. 
Crataegus ? aequidentata Lx. Tert. FL, p. 297, pi. lviii, f. 4, 4a, 1878. 
Laramie group?: Carbon, Wyoming. 
Crataegus antiqua Heer. PL Foss. Arct., vol. i, p. 125, pi. 1, f. 1, 2, 1868 ; 
Lx., Bull. Mus. Comp. Zool., vol. xvi, p. 57, 1888. 
Denver group: Golden, Colorado. 
Crataegus atavina Heer. Fl. Foss. Arct., vol. vii, p. 43, pi. lxiv, f. 11, 
1883; Lx., Geol. and Nat. Hist. Surv. Minn., vol. iii, p. 20, pi. B, f. 8, 
1893. 
Dakota group : New Ulm, Minn. 
Crataegus betulaefolia Lx. Bull. Mus. Comp. Zool., vol. xvi, p. 56, 1888. 
Denver group : Golden, Colorado. 
Crataegus Engelhardti Lx. Bull. Mus. Comp. Zool., vol. xvi, p. 56, 
1888. 
Denver group : Golden, Colorado. 
Crataegus flavescens Newby. Proc. U. S. Nat. Mus., vol. v, p. 507, 
1882 [1883]. 
Myrica diversifolia Lx. Cret. and Tert. FL, p. 148, pi. xxv, f. 6-15, 1883. 
Miocene? : Bridge Creek, John Day Valley, Oregon. 
Green Eiver group : Florissant, Colorado. 
Crataegus Holmesii Lx. Proc. U. S. Nat. Mus., vol. x, p. 43, pi. iii, 
f. 7-9, 1887. 
Denver group : Silver Cliff, Colorado. 
