202 CATALOGUE OF THE CRETACEOUS AND [bull. 152. 
Rhamnus rectinervis Heer. Fl. Tert. Helv., vol. iii, p. 80, pi. cxxv, 
f. 2-G, 1859; Lx., Ann. Kept. IT. S. Geol. and Geogr. Surv. Terr., p. 
295, 1871 [1872]; Tert. Fl., p. 279, pi. Hi, f. 12-15, 1878. 
Laramie group: Golden, Colorado; Black Buttes, Wyoming. 
Laramie group?: Evanston, Wyoming; Bozeman coal field, Mon- 
tana? 
Rhamnus revoluta Lx. Fl. Dak. Gr., p. 171, pi. lxv, f. 5, 1892. 
Dakota group: Kansas. 
Rhamnus Rossmaessleri Ung. Gen. et Sp. PI. Foss., p. 404, 1850; 
Hollick, Trans. N. Y. Acad. Sci., vol. xii, p. 35, pi. iii, f. 5, 1892. 
Cretaceous: Tottenville, Staten Island, New York. 
Rhamnus Rossmassleri Ung. Lx.=Juglans rhamnoides. 
Rhamnus similis Lx. Fl. Dak. Gr., p. 108, pi. xxxv, f. 12, 13, 1892. 
Dakota group: Kansas. 
Rhamnus salicifolius Lx. Am. Journ. Sci., vol. xlv, 2d ser., p. 206, 
1808; Tert. Fl., p. 282, pi. liii, f. 9, 10, 1878. 
Laramie group: Marshalls and Coal Creek, Colorado; Black 
Buttes, Wyoming. 
Rhamnus tenax Lx. Am. Journ. Sci., vol. xlvi, p. 101, 18G8; Cret. Fl., 
p. 109, pi. xxi, f. 4, 1874; Fl. Dak. Gr., p. 170, pi. xxxviii, f. 6, 1892. 
Dakota group: Southern Kansas. 
Rhamnus sp., Dn. Kept. Geol. and Res. near 49th Parallel, Appen. 
A, p. 330, 1875. 
Lignite tertiary: Great Valley. 
Rhizocaulon gracile Lx.=Phyllites improbatus. 
RHUS (Tournefort.) Linnreus. Gen., ed. i, p. 84, 1737. 
Rhus acuminata Lx. Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., 
1871, suppl., p. 8, 1871 [1872]; Cret. and Tert. Fl., p. 194, pi. xlii, f. 
14-17, 1883. 
Green River group : Florissant and Green River, Colorado. 
Rhus bella? Heer. Fl. Foss. Arct., vol. ii, abt. iv, p. 482, pi. lvi, f. 
3-5 1869; Lx., Ann. Rept, U. S. Geol. and Geogr. Surv. Terr., p. 407, 
1872 [1873]. [Not afterwards mentioned by Lesquereux.J 
?: Six miles above Spring Canyon, Montana. 
Rhus Bendirei Lx. Proc. U. S. Nat. Mus., vol. xi, p. 15, pi. ix, f. 2, 
1888. 
Miocene : John Day Valley, Oregon. 
Rhus Boweniana Lx. Mem. Mus. Comp. Zool., vol. vi, no. 2, p. 29, pi. 
ix, f. 8, 9, 1878. 
Miocene: Chalk Bluffs? California. 
Rhus cassioides Lx. Cret. and Tert. Fl., p. 193, pi. xli, f. 11, 1883. 
Green River group : Florissant, Colorado. 
Rhus coriarioides Lx. Cret, and Tert. Fl., p. 193, pi. xli, f. 3, 1883. 
Green River group : Florissant, Colorado. 
