NO. 2151. FOSSIL PLANTS FROM FLORISSANT—KNOWLTON. 281 



CELASTRUS LACOEI Lesquereus. 



Plate 24, fig. 6. 



Celastrus lacoei Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and 

 Tert. Fl.), 1883, p. 184. 



Type.— Cat. No. 50,309, U.S.N.M. (Original No. 49 in Lacoe's 

 cabinet.) 



Leaf subcoriaceous in texture, obovate or spatulate in shape, ob- 

 tuse and rounded at apex, narrowed below to a wedge-shaped entire 

 base and a short, thick, petiole, length 3.5 cm., width 1.3 cm.; 

 margin for two-thirds or more of length above the base, undulate- 

 toothed, the teeth relatively large, roimded; midrib relatively thick, 

 straight; secondaries numerous, alternate, at an acute angle, thin, 

 apparently camptodrome but details obscure. 



This species, which is here figured for the first time, was named and 

 described by Lesquereux in 1883. The type-specimen, which re- 

 mams unique, came to the United States National Museum through 

 the collection of R. D. Lacoe. 



This species has some resemblance to certain small obtuse leaves 

 of Fagopsis longifolia (Lesquereux) Hollick, but may be known by the 

 obtuse apex, undulate-toothed margm and mdistinct secondaries. 



CELASTRINITES ELEGANS Lesquereux. 



Plate 21, fig. 7. 



Celastrinites elegans Lesquereux, Rept. U. S. Geol. Siu-v. Terr., vol. 8 (Cret. and 



Tert. Fl.), 1883, p. 185, pi. 31, figs. 9, 10. 

 Celastrus greithianus Heer. Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8 



(Cret. and Tert. Fl.). 1883, p. 184. 



Cat. No, 50,348, U.S.N.M., as Celastrus greithianusJIeer. Not before 

 figured. Lesquereux referred two leaves from Florissant to Heer's 

 Celastrus greithianus, both of which are before me, and which are cer- 

 tainly not con-generic. One specimen [Cat. No. 50,347, LT.S.N.M,, 

 Lacoe collection No. 74], is a deformed leaf of some kind, probably a 

 leaflet of Sapindus, but it is quite impossible to be certain of its 

 afinity and it is not further considered. 



The other leaf [Cat. No. 50,348, U.S.N.M., Lacoe collection No. 74], 

 is undoubtedly a small example of Celastrinites elegant, or rather it is 

 identical with figure 9 ^ referred to this species, for I quite agree 

 with Cockerell that the two figures under this name can not be 

 con-generic. Notwithstanding Lesquereux has said of the leaves 

 referred to C. greithianus that they are "very entire," on clearing 

 away the matrix around the margin in the one-figured it is seen to be 

 plainly crenulate, and except for being a little smaller is identical with 

 the figure mentioned. 



I Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and Tert. Fl.), 1883, pi. 31, flg. 9. 



