NO. 2151. FOSSIL PLANTS FROM FLORISSANT— KNOWLTON. 273 



Three species of Rosa have been previously described from Floris- 

 sant, these being i?. hilliae Lesquereux/ R. wilmaitae Cockerell,^ and 

 R. rusJciniana Cockeroll.^ The first is characterized by possessing 

 three leaflets, the second by five leaflets and the present species by 

 seven leaflets. In size of leaf and shape of leaflets they do not differ 

 greatly though in the present species the leaflets arc all slightly nar- 

 rower than in either of the others. 



This species is named in honor of Samuel H. Scudder, the dis- 

 tinguished authority on fossil insects, who collected the specimens. 



ROSA? INQUIRENDA. new spcclee. 



Plate 17, fig. 1. 



Represented by what appears to be a fruit or ''hip," consisting of a 

 thick, circular, capsule-like body about 7 mm. in diameter, and five 

 slender, acute radiating calyx lobes. The greatest spread of the lobes 

 is fully 3 cm., the individual lengths of the lobes being 12 or 13 mm. 



2)/pe. — Cat. No. 34,741, U.S.N.M. Hambach collection. 



The exact nature of this specimen is not defi-uitely known as it is 

 not clearly preserved, but it has the appearance of being a rose ' 'hip " ; 

 it may, however, be a regular-lobed and somewhat coriaceous calyx 

 of another genus. 



Family MALACEAE. 



AMELANCHIER PERITULA Cockerell. 



Amelanchier peritula Cockerell, Bull. Amer. Miis. Nat. Hist., vol. 24, 1908, p. 95, 

 pi. 6, fig. 6. 



The Hambach collection contains a single leaf that is referred to 

 this species. 



SORBUS DIVERSIFOLIA (Lesqnereux) Cockerell. 



Sorhus diversifolia (Lesqnereux) Cockerell, Amer. Jour. Sci., vol. 29, 1910, p. 



76, fig. 1. 

 Myrica diversifolia Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and 



Tert. Fi.), 1883, p. 148, pi. 25, figs. 6, 10-12. 

 Crataegus acerifolia Lesquereux, Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. 



and Tert. Fl.), 188.3, p. 198, pi. 36," fig. 10. 

 Crataegus lesquereuxi Cockerell, Bull. Torr. Bot. Club, vol. 33, 1906, p. 311; 



Univ. Colorado Studies, vol. 3, 1906, p. 171. 

 Onoclea rediccta Cockerell, Bull. Amer. Mus. Nat. Hist., vol. 24, 1908, p. 108, 



pi 6, fig. 4. 



The type-specimens of all of the leaves referred by Lesquereux, 

 to his Myrica diversifolia should be preserved in the United States 

 National Museum, but a careful search fails to disclose only five of 

 the 10 leaves. Of the four leaves (figs. 6, 10-12) which it seems to me 



> Rept. U. S. Geol. Surv. Terr., vol. 8 (Cret. and Tert. Fl.), 1883, p. 199, pi. 40, figs. 16, 17. 

 2 Bull. Amer. Mus. Nat. Hist., vol. 24, 1908, p. 94, pi. 7, fig. 14. 

 » Amer. Jour. Sci., vol. 26, 1908, p. 540, fig. 5. 



-Proc.N.M.vol.51— 16 18 



