NO. 2151. FOSSIL PLANTS FROM FLORISSANT— KNOWLTON. 283 



ribbed instead of five-ribbed, it has been described as new. As lend- 

 ing weight to the idea that it really may be distinct from the larger 

 species, it may be inentioned that there is another example in the 

 same collection that is of exactly the same size; it is not as well pre- 

 served fls the one taken as the type, hence has not been figured. 



This species is named in honor of Mr. Walter C. G. Kirchner, who 

 described the first well authenticated maple from Florissant. 



ACER MYSTICUM Kirchner. 



Acer mysticura Kiechner, Trans. St. Louis Acad. Sci., vol. 8, 1898, p. 181. pi, 11, 

 fig. 2. 



3Vpe.— Cat. No. 33,674, U.S.N.M. 



This species, contained in the Hambach collection, is doubtless the 

 fruit of Acer jiorissmvti Kirclmer, but as they are found in association 

 and not in actual connection, they must be held as distinct. The 

 fruit is hardly to be distinguished from a number of decribed species, 

 such, for instance, as that referred to Acer indivisum^hj Lesquereux.^ 



Family SAPINDACEAE. 



SAPINDUS LANCIFOLIUS Lesquerenx. 



Sapindm Innicfolius Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and 

 Tert. Fl.), 1883, p. 182, pi. 32, figs. 3-6; pi. 37, fig. 9. 



Several revj perfect specimens are contained in the Hambach 

 collection. 



SAPINDUS COLORADENSIS Cockerell. 



Sapindm coloradensis Cockerell, Bull. Arner. Mus. Nat. Hist., vol. 24, 1908, 



p. 101, pi. 9, fig. 31. 

 Sapindus angmtifolius Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 7 (Tert. 



Fl.), 1878, pi. 49, fig. 2; vol. 8 (Cret. and Tert. Fl.), 1883, p. xxxvii, figs. 3-5. 



Several good specimens in the Hambach collection that must be 

 referred here. 



Family RHAMNACEAE. 



RHAMNUS KIRCHNERI Cockerell. 



Rhamnus kirchneri Cockerell, Bull. Torr. Bot. Club, vol. 33, 1906, p. 311; Uni- 

 versity Colorado Studies, vol. 3, No. 3, 1906, p. 170. 



Rhamnus ellipticus Kirchner, Trans. St. Louis Acad. Sci., vol. 8, 1898, p. 183, 

 pi. 15, fig. 3 [Not Rhamnus ellipticus Swartz, 1788]. 



Type.— C&i, No. 33,688, U.S.N.M. 



The specimen remains unique, at least so far as the present collec- 

 tions are concerned. 



1 Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and Tert. Fl.), 1883, pi. 36, fig. 9. 



