NO. 2151. FOSSIL PLANTS FROM FLORISSANT— KNOWLTON. 257 



ariensis Saporta, will have to be settled later. They do not appear 

 to be referable to M. drymeja, nor do they seem to be anything like 

 the one above mentioned from Florissant. 



The leaves described and figured by Lesquereux xmder the name 

 of Myrica acuminata Unger, are all preserved in the United States 

 National Museum [Nos. 143-145], and appear referable to two 

 species. Figures 2 and 3 [144 and 145] appear to be best refeiTed to 

 M. drymeja, while figm-es 1 and 4 [143, 145a] are refeiTed to M. 

 scottii. Shortly after the pubUcation of Lesquereux's Tertiary Flora 

 (1878), Ettingshausen * took occasion to change the names of a num- 

 ber of his (Lesquereux's) species, among them being the four leaves 

 referred to Myrica acuminata Unger. These Ettingshausen called 

 Ceratopetalum americanum, but it seems best to dispose of them as 

 indicated above. 



MYRICA COLORADENSIS, new species. 



Plate 21, fig. 1. 



Myrica amygdalina Saporta. Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 

 8 (Cret. and Tert. Fl.), 1883, p. 147, pi. 26, figs. 1-4. 



T^/pes.— U.S.N.M., figs. 1 [1,654], 2 [1,655], 3 [1,654a], 4 [1,653], 

 cotypes. Cat. Nos. 1,657, 1,658, U.S.N.M. 



I believe this to be a good species and well entitled to recognition. 

 It has small leaves, 2.5 to 5.5 cm. in length, submerabranaceous in 

 texture, oblong-lanceolate, enlarged toward the upper part, where 

 they are obtuse or apiculate, and narrowed below to a short petiole. 

 The margin is denticulate or subentire, becoming quite entire below. 

 The midrib is rather slender, while the secondaries are very numerous, 

 at an angle of about 50°, much curved outward, obliquely branching 

 and reticulate, with the nervilles oblique to the secondaries. 



This species was referred by Lesquereux to Myrica amygdalina 

 Saporta,2 from the Eocene of France, and it must be confessed it has a 

 very strong resemblance to at least one of Saporta's figures (fig. 8), 

 though the other figures are perfectly entire and look much more 

 like leaves of Salix than leaves of Myrica. The teeth in the French 

 species are very slight and remote, and the secondaries emerge at a 

 more open angle than in the Florissant leaves and are curved upward 

 instead of outward. 



I have refigured one of the types of the Florissant species,^ which 

 brings out very clearly the differences between it and Saporta's 

 species. The margin is provided with numerous regular, small, sharp 



I Ettingshausen, C. von, Denks. d. k. Akad. d. wiss. math.— nat. classe, vol. 47, 18&3, p. 137 (37]; Geol. 

 Surv. N. S. W., Mem. Pal., No. 2 (Tert. Fl. Australia], ISS, p. 58. 



» Saporta, Gaston de, Etudes sur la V6g. sud-est France: Ann. Scl. Nat. (5 ser.) bot., vol. 9, 1867, p. 163 

 211, pi. 1, flgs. 8-10. 



8 Lesquereux's fig. 3, Rept. U. S. Geol. Burv. Terr., vol. 8, 1883, pi. 26. 



-Proc.N.M.vol.51— 16 17 



