NO. 2151. FOSSIL PLANTS FROM FLORISSANT— KNOWLTON. 285 



Family STERCULIACEAE. 



STERCULIA ENGLERI KIrchner. 



Sterculia engleri Kirchner, Trans. St. Louie Acad. Sci., vol. 8, 1898, p. 180, pi. 14, 

 fig. 3. 



Type.— Co^i. No. 33,684, U.S.N.M. 



An examination of the type of this species, contained in the Ham- 

 bach collection, shows it to be very clearly related to S. rigida Les- 

 quereux,^ also from Florissant, and it seems not unlikely that a series 

 of specimens, if such should ever be found, would show them to be the 

 same. 



The Lacoe collection contains a single example [original Lacoe No. 

 44, Cat. No. 50,300, U.S.N.M.] that is undoubtedly the same as 

 S. engleri Kirchner, although it bears on the back a label reading 

 ''Sterculia rigida Lesq., Cotype," and had passed through Lesque- 

 reux's hands. Leaves of Sterculia appear to be very rare in the 

 Florissant lake beds, in fact but three specimens have passed under 

 my notice, one being the type of S. rigida, another the type of 

 S. engleri, and the other the one under discusion which is, as stated, 

 identical with S. engleri. As already pointed out, a series might show 

 them to mtergrade as regards size, which is about the only difference, 

 but so far they hold good. 



Family EBENACEAE. 



mOSPYROS BRACHYSEPALA Al. Brann. 



Diospyros brachysepala Al. Braun. Lesquereux, Rept. U. S. Geol. Surv. Terr., 

 vol. 8 (Cret. and Tert. Fl.), 1883, p. 174, pi. 34, figs. 1, 2. 



Diospyros princetonia Cockerell, Bull. Amer. Mus. Nat. Hist., vol. 24, 1908, 

 p. 105, pi. 10, fig. 36. 



The Hambach collection includes a single very perfect leaf that is 

 absolutely indistinguishable from Diospyros brachysepala as figured 

 and described by Lesquereux. Whether or not it is properly referred 

 to the European species is another matter, but certain it is that it 

 can not be separated from the Florissant leaf so identified. I am also 

 unable to separate Diospyros princetonia, Cockerell from these leaves. 



Family OLEACEAE. 



FRAXINUS LIBBEYI Lesquereux. 



Plate 24, fig. 5. 



Fraxinus lihheyi Lesquereux, Rept. IT. S. Geol. Surv. Terr., vol. 8 (Cret. and 



Tert. Fl.), 1883, p. 171, pi. 27, figs. 5-7, 9. 

 Ostrya betuloides Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and 



Tert. FL), 1883, p. 151. 



Type of "Ostrya betuloides" Lesquereux. — Cat. No. 50,266, U.S.N.M. 

 [original No. 26 of Lacoe's cabinet]. 



1 Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and Tert. Fl.), 1883, p. 179, pi. 34, fig. 12. 



