Gress : Fossil Plants of the Dakota. 301 



removed, which shows the leaf to have a different outHne, making it 

 resemble more closely Mcnispcrmitcs obtitsilobus, to which species I 

 have referred it. 



Occtirrence: Salina. Kansas, Dakota Sandstone (Cretaceous). Leo. 

 Lesquereux Collection, U. S. National Museum (C. M., Accession No. 

 4799)' Carnegie Museum, Pittsburgh, Pa. {No. 61). 



Family LAURACE.F:. 

 Genus Sassafras. 



There are seventeen specimens in the collection, which I have re- 

 ferred to seven species of this genus. Most of these species have 

 been included in Sassafras cretacemn Newb. by Newberry in Later 

 Extinct Floras of N. A., page 98, PI. 6, figs. 1-4; PI. 7, figs. 1-3; 

 PI. 8, figs. I, 2. 



Berry in his Notes on Sassafras, Botanical Gazette, XXXIV, Dec, 

 1902, pp. 426-450, has retained Sassafras Mndgei and Sassafras crc- 

 taceiim (in part) in this genus. Sassafras acntilobum he has doubt- 

 fully referred to Aralia. Sassafras harkerianum and 5". obfjismn he 

 refers to Cissitcs; while Sassafras dissectnm and S. mirabilc he has 

 referred to Plataniis. 



I have not hesitated to refer them all to Sassafras except Sassafras 

 (Araliopsis) dissectnm and 6". viirabilc, both of which, as well as 

 those referred to the same species by Lesquereux, seem to be more 

 closely related to Plataniis than to Sassafras. 



28. Sassafras acutilobum Lesquereux. 



Sassafras acutilobum Lesquereux, Cretaceous Flora. Report of the Geological 

 Survey of the Territories, VI, 1874, p. 79, PI. 14, figs, i, 2; The Creta- 

 ceous and Tertiary Floras, U. S. Geological Svirvey of the Territories, 

 VIII, 1883, p. 56, PI. 5. figs. I, 5- 



Newberry, The Flora of the Amboy . Clays, U. S. Geological Survey, Mono- 

 graph XXVI, 1895, p. 87. PI. 25, figs, i-io, and PI. 26, figs. 2-6; The Later 

 Extinct Floras of North America, U. S. Geological Survey, Monograph 

 XXXV, 1898, pp. 98, 99. 



Berry, Notes on Sassafras, Botanical Gazette, XXXIV, Dec, 1902, pp. 426- 

 450 ; The Flora of the Raritan Formation, Geological Survey of N. J., Bul- 

 letin 3, 191 1, p. 140, PI. 18. fig. 2. 



HoLLiCK, Cretaceous Flora of Southern N. Y. and New England, U. S. 

 Geological Survey, Monograph L, 1906, p. 77, PI. 30, figs. 8, 9. 



