MARYLAND GEOLOGICAL SURVEY 



897 



much smaller than in our common American Diospyros virginiana L., 

 but may be matched in some of the still existing species and is almost the 

 exact counterpart of some of the calices of Diospyros brachysepala Al. 

 Br., figured by Heer from the Swiss Tertiary. There can be no question 

 regarding its identity and in this respect it is much more conclusive than 

 the Caty cites diospyriformis described by Xewberry from the middle 

 Earitan of Xew Jersey, which has a five-lobed calyx. Its occurrence at 

 the same horizon at which the leaves of Diospyros primceva Heer are so 

 abundant not only suggests that it may have been borne by the same tree 

 which furnishes the leaves found all the way from western Greenland to 

 Alabama, but also serves in a measure to corroborate the identification of 

 these leaves. 



The family Ebenacece has only five modern genera, hut these include a 

 large number of species, a majority of which are referred to the genus 

 Diospyros. The latter has about one hundred and eighty existing species 

 distributed in both hemispheres. They are mostly tropical, a few species 

 extending beyond the tropics in eastern North Amedica, in the Mediter- 

 ranean region of Eurasia, and in eastern Asia where there is a considerable 

 massing of forms. 



Occurrence. RARITAN FORMATION. East Washington Heights, Dis- 

 trict of Columbia. 



Collections. U. S. National Museum. 



Order POLEMONIALES 

 Family BORAG1NACEAE 



Genus CORDIA Linne 

 [Sp. PI., 1753, p. 190] 



CORDIA APICULATA (Hollick) Berry 

 Plate XC, Fig. 6 



Populus apiculata Hollick, 1892, Trans. N. Y. Acad. Sci., vol. xii, p. 4, pi. iii, 



fig. 2. 



Populus apiculata Smith, 1894, Geol. Coastal Plain in Ala., p. 548. 

 Populus apiculata Newberry, 1896, Mon. U. S. Geol. Survey, vol. xxvi, p. 65, 



pi. xv, figs. 3, 4. 

 Populus apiculata Berry, 1906, Bull. Torrey Bot. Club, vol. xxxiii, p. 172. 



