Liriodendron Celakovskii Velen. 
By Epwarp W. BERRY 
In 1881 Professor Velenovsky found a leaf in the Cretaceous 
Clays, near Kuchelbad, in Bohemia, which he subsequently de- 
scribed * under the above name. Following is his description: 
“Das Blatt im Umrisse rundlich, seicht dreilappig, der Mittellap- 
pen nicht viel langer als die seitlichen, vorne seicht ausgerandet, 
die seitlichen ebenfalls ausgerandet oder beinahe abgerundet. Der 
Primarnerv gerade, nicht zu stark, zur Spitze merklich verdunnt; 
in der oberen Halfte desselben entspringen noch 2-3 Paare von 
starkeren Secundarnerven. Beiderseits des Mittelnerven ent- 
springen am Grunde noch 2 Basalnerven, von denen der obere 
etwa in der Mitte seiner Lange noch ein langes Secundarastchen 
abzweigt, die feinere nervation ist unkenntlich. Der Blattstiel 
etwa 2 cm. lang, gerade, am Grunde stark.”’ 
This leaf is of considerable interest as it is the only specimen 
of Cretaceous age in Europe which has been referred to Lirioden- 
dron, the balance of the European species appearing in the later 
Tertiary (Oligocene, Miocene, and later) and greatly resembling 
the existing tulip-tree. A critical comparison convinces the writer 
that this leaf is in no wise related to Liriodendron, and the result 
seems worthy of publication inasmuch as it limits the known 
troduction of this genus into Europe to the Oligocene, and sug- 
gests that this introduction may have been from the northwest 
through Heer’s Liriodendron Procaccinii of the Eocene (or at the 
very latest Oligocene) of Greenland and Iceland. This species 17 
turn is the logical descendant from forms similar to those found sg 
the Amboy Clays and related strata from New Jersey to Martha s 
Vineyard. 
Velenovsky is positive enough that his identification of this 
leaf is correct and he compares it to those forms of Liriodendron 
Meckii from Nebraska. While the two leaves are much the same 
size, Lirtodendron Meekii is oblong in its general outline while this 
* Die Fl. der Boehm, Kreideform., Beitrage zur Palaeont. des Oesterreich-Ungar™® 
und des Orient. E. v. Mojsisovics und M. Meumayr, 3 : 18 (43), A/- 6 ( 14), fe 
478 
