414 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



— a type which lias apparentlj- undergone hut little modification 

 in surticial characters since the time of its first appearance in 

 connection with a species of the flora of early Tertiary time. 



The genus Vitis is represented in a number of collections of 

 Pleistocene plants, but heretofore only by the seeds,^" and by a 

 single tendril/" so that we have no leaf of any of these Pleisto- 

 cene grapes with which to compare our specimen, and the exten- 

 sive heterophylly that obtains in most of the existing species of 

 grapes would render exact and satisfactory comparison with 

 any one of them impossible. In the circumstances I have thought 

 it the better course to describe our specimen as representing an 

 extinct species, different from any heretofore recorded. 



Order MALVALES 



Family Tiijaceae 

 Genus Tilia Linnaeus 

 Tilia ? incerta n. sp. 



Plate 43, figure 2 



"Fragment of the lower part of a large leaf with well-defined 

 lateral primaries, provisionally identified as belonging to the 

 genus Populus." Hollick, Summary Eept. (loc. cit.), p. 135. 



Leaf large, pinnately nerved, the two basilar secondaries ap- 

 parently simulating lateral primaries, with branches from the 

 undersides that branch and fork, the ultimate ramifications end- 

 ing in the fine marginal dentitions. 



This fragmentary specimen was originally regarded as prob- 

 ably belonging to a species of poplar [loc. cit.), having been com- 



39 Berry, E. W. (a) Pleistocene plants from Virginia. Torreya, vol. 6, p. 89. 

 1906. (b) Contributions to the Pleistocene flora of North Carolina. Jour. Geology, 

 vol. 15, p. 345. 1907. (c) Additions to the Pleistocene flora of New Jersey. Tor- 

 reya, vol. 10, p. 265, text fig. 2 (F. pseudorotundifolia Berry), p. 266 (F. ef. aesti- 

 valis Michaux). 1910. (d) The fossil plants from Vero, Florida. Fla. State Geol. 

 Survey, Ninth Ann. Eept. p. 28 (F. austrina Small?, or F. coriacea Shuttleworth?) . 

 1917. (e) The fossil swamp deposit at the Walker Hotel site . . . Washington, D. C. 

 Washington Acad. Sei., Jour. vol. 14, p. 21, pi. 2, figs. 6-9 (F. oordifoUa Michaux). 

 1924. 



Hollick, Arthur. Md. Geol. Survey, Pliocene and Pleistocene, p. 235. 1906. 



40 Berry, E. W. (a) The fossil plants from Vero, Florida, loc. cit. (V. cf. rotun- 

 difolia Michaux). (b) Pleistocene plants from North Carolina. U. S. Geol. Survey, 

 Prof. Paper 140-C, p. 115, pi. 57, fig. 6. 1926. 



