316 Annals of the Carnegie Museum. 



The specimens examined fit almost exactly the above description by 

 Lesquereux. They are of the five-lobed type, about 20 cm. long and 

 20 cm. broad. The petioles, however, are only between two and three 

 centimeters long; they probably either have not been preserved or are 

 broken off. 



Occurrence: Ellsworth County, Kansas, Dakota Sandstone (Cre- 

 taceous). Baron de Bayet Collection, Accession No. 2348, Carnegie 

 Museum. Pittsburgh, Pa, (Nos. 4, 4a). A third specimen {4b) is 

 from Fort Harker, Kansas, Dakota Sandstone (Cretaceous). Chas. 

 Sternberg Collection, from U. S. National Museum (C. M., Accession 

 No. 4799)- 



45. Sterculia aperta Lesquereux, 



Stcrculia aperta Lesquereux, Cretaceous and Tertiary Floras, U. S. Geological 

 Survey, Monograph VIII, 1883. p. 82, PI. 10, figs. 2, 3; The Flora of the 

 Dakota Group, U. S. Geological Surxey. Monograph XVII, 1892, p. 185, 

 PI. 22, fig. a. 



Sterculia obtitsiloba Lesquekeux, The Flora of the Dakota Group, U. S. 

 Geological Survey, Monograph XVII, 1892, p. 185. In the above citation 

 Lesquereux says that Sterculia obtiisiloba may be a variety of Sterculia 

 aperta. Sterculia obtiisiloba was first named Aralia tripartita by Lesquereux. 

 See Aralia tripartita Lesquereux, Hayden's Annual Report, U. S. Geological 

 and Geographical Sur\-ey of Colorado and adjacent Territories, 1874, p. 348, 

 PL 1, fig. I. 



Description : Leaf palmately three-lobed and three-nerved from 

 near the base ; about 8 cm. long from base to apex and about 7 cm. 

 broad between apices of the two outer lobes. The lobes vary from 

 about 3.5 cm. to 5 cm. long and from i to 2 cm. wide, the middle 

 being the longest and the narrowest. The lobes are entire, almost 

 linear, abruptly rounded at the apex, and with obtuse sinuses. The 

 surface is smooth, with a very slight trace of secondary veins. The 

 base is apparently somewhat decurrent to the petiole, which is 

 broken off. 



Occurrence : Ellsworth County, Kansas. Dakota Sandstone (Cre- 

 taceous). Baron de Bayet Collection, Accession No. 2348, Carnegie 

 Museum. Pittsburgh. Pa. (No. S). 



46. Sterculia mucronata Lesquereux. 



Sterculia mucronata Lesquereux. The Flora of the Dakota Group, U. S. 

 Geological Survey, Monograph XVII, 1892, p. 182, PI. 30, figs. 1-4. 



