Gress : Fossil Plants of the Dakota. 325 



Myrsine borealis Heer, Berry, The Flora of the Raritan Formation, Geolog- 

 ical Survey of N. J., Bulletin 3, 191 1, p. 208. 



Description: The leaf does not fit the type given in Cretaceous 

 Flora, Lesquereux, /. c. It does, however, come under his later 

 description given in the Flora of the Dakota Group, /. c. There 

 are two specimens of the leaf, one showing the upper and the other 

 the lower surface. The leaf is 5 cm. long and 3.2 cm. broad near the 

 middle ; it is oval, obtuse, entire, tapering rather abruptly to the 

 petiole. There are six pairs of secondaries, the lowermost indistinct 

 and near the base. They branch from the midrib at an angle of 

 45°-50°, arched in traversing the blade, camptodrome ; areolation 

 indistinct. 



Remark: Berry, op. cit., gives Diospyros rotundifolia, as described 

 by Hollick, op. cit., as a synonym of Myrsine borealis Heer, and not 

 the same as Diospyros rotundifolia Lesquereux. 



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

 taceous). Nos. 2() and 2ga are of the Baron de Bayet Collection 

 (C. M., Accession No. 2348). No. 2gh is from the U. S. National 

 Museum (C. M., Accession No. 4799). All in Carnegie Museum, 

 Pittsburgh, Pa. 



58. Diospyros Steenstrupi Heer. (?) 



Diospyros Steenstrupi Heer, Flora Fossilis Arctica, VII, 1883, 32, PI. 64, 



fig. I. (Not available for reference) ; Lesquereux, The Flora of the 



Dakota Group, U. S. Geological Survey, Monograph XVII, 1892, p. iii, 

 PI. 16, fig. 9- 



Description: The leaf is about 7 cm. long and 4.5 cm. wide; ovate, 

 acute, constricted below the apex (broken), entire; base imperfect. 

 Five pairs of secondaries are visible, the lowermost thin, unbranched, 

 and close to the border (only a part of this one can be seen). The 

 second and third pairs of secondaries are strong and branched on the 

 outer side ; these both extending along the border for about two-thirds 

 of the length of the leaf. They branch from the straight, strong mid- 

 rib at an angle of about 40°. The upper pairs of secondaries are 

 opposite, considerably curved and thinner than the third and fourth 

 pairs. The nervation is camptodrome, forming a row of arches along 

 the borders. I refer this leaf to Diospyros Steenstrupi with some 

 hesitatioh. 



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



