. A catalogue of the Cretaceous and Tertiary plants of North America [microform]. Paleobotany; Paleobotany; Paléobotanique; Paléobotanique. KXOWLTON.] TERTIARY PLANTS OF NORTH AMERICA. 179 Fopulus mutabilis crenata Heer. Fl. Tert. Ilelv., vol. it, p. 21, pi. Ix, f. r),S, ll,12<t, 1850; Lx., Ami. Eept. U. S. (leogr. Surv. Terr., p. 380, 1872 [1873]. [Not afterwards referred to by Lesqnen'ux.] : Carbon, Wyoming. Fopulus mutabilis lancifolia Hear. Fl. Tert. TIelv., vol, ii, j). 23, pi. Ixi, f. 7,8,10,1850; Lx., Ann. Kept. U. S. Gool, and (Jeogr. Surv. Terr., p. 290,1871 [1872]. [No
. A catalogue of the Cretaceous and Tertiary plants of North America [microform]. Paleobotany; Paleobotany; Paléobotanique; Paléobotanique. KXOWLTON.] TERTIARY PLANTS OF NORTH AMERICA. 179 Fopulus mutabilis crenata Heer. Fl. Tert. Ilelv., vol. it, p. 21, pi. Ix, f. r),S, ll,12<t, 1850; Lx., Ami. Eept. U. S. (leogr. Surv. Terr., p. 380, 1872 [1873]. [Not afterwards referred to by Lesqnen'ux.] : Carbon, Wyoming. Fopulus mutabilis lancifolia Hear. Fl. Tert. TIelv., vol, ii, j). 23, pi. Ixi, f. 7,8,10,1850; Lx., Ann. Kept. U. S. Gool, and (Jeogr. Surv. Terr., p. 290,1871 [1872]. [Not afterwards recognized by Lesquereux.} Laramie group?: Spring Canyon, Montana. Fopulus mutabilis ovalis lleer. Fl. Tert. Helv., vol. ii, p. 22, i)l. i, f. 1,2; ii, f. 2 ah; Ixi, f. 1-3, 0, 9; Ixiii, f. 4, 1856; Lx., Tert. Fl., p. 177, pi. xxiv, f. 3,'4, 1878. Popiilus ovalis? (J()pp. Lx., Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., p. 292, 1871 [1872]. I'opiiliisiuutabilia repando-crouata Heer. In Lx., Trans. Am. Pliil. S(i. 313, 1874 [1876]. Populus nionodon Lx. Ex. p. Tert. Fl., p. 180, pi. xxiv, f. 2, 1878. Livingston beds: Spring Canyon, Montana. Denver group: (iolden and Plum Creek, Colorado. Laramie group: Black Buttes, Wyoming. Laramie grouj)?: Evanston, Wyoming. Montana Ibrmation: Point of Rocks, Wyoming. I'oimlus mulahilis r('i)an(lo-cienata neer=Populus mutabilis ovalis. Populus nebrascensis Newby. Later Extinct Floras, p. (i2, 1808. Fort rnioH groniM Vellowstone River, Montana. Denver group: (iol<(<'(i, Coloiado. Populus nebrascensis aeute-dentata Lx. Bull. Mas. Comp. Zotil., ^. 47, iSSK. iHwiver rroiip: (ioldiri, Colonulo, Popui s nc rascensis grandidentata Lx. Jiiill. Mus. Comp. Zool., %«i xvi, p. 47, LHS8. liettvpr sirouiv. (lolden, Colorado. Pofmhm â â¢brascenais longifolia Lx. i'<nll. Muk l., vol. ., p. J r 1H.'^*' Denver group: (iolden, Colorado. Populus nebrascensis rotundata Lx. Bull. Mus. Comp. X^kJI., vol. xvi, p. 47,, Denver gio
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