BERRY: MESOZOIC FLORA OF ATLANTIC COASTAL PLAIN 181 
about 4 cm., the Alabama specimen being 4.3 cm. Lobes more or 
less well marked, the basal pair directed laterally, and broadly 
rounded, the upper pair directed diagonally, usually less well 
marked, rounded at the outside and inclined toward angularity 
at the tip. Lateral sinuses more or less indented in the typical 
forms, such as the Alabama specimen figured, extending nearly 
half way to the midrib and broadly rounded. Apical sinus wide 
and open, usually cuneate in outline. Base somewhat descending 
close to the midrib, broadly and somewhat curved-cuneate. Mid- 
rib stout, straight, or somewhat curved. Secondaries thin, par- 
allel, about six pairs branching from the midrib at angles of over 
45 degrees and gently curving upward toward their extremities, 
probably camptodrome, their ultimate course not made out. 
The mid-Cretaceous leaves, variously described as Liriodendron 
Meekui, L. primaevum, L. semialatum, and L. simplex, are in a state - 
of almost hopeless confusion, due largely to the difficulty of deter- 
mining the specific lines of cleavage in a probably genetic and 
variable series of forms. 
Liriodendron Meekiit was described by Professor Heer in 1858, 
from the Dakota sandstone of Nebraska, in an appendix to a 
paper by Meek and Hayden. It was described as trilobate and 
was figured, but was compared with the European Liriodendron 
Procacinii Unger and with the living Liriodendron Tulipifera Linné. 
In 1866 the same author returns to this subject, figuring the two 
well-known specimens, which figures have been reproduced by 
both Lesquereux and Newberry. It would seem that this form 
must be considered as the type of this species and the present 
writer so considers it. However, Heer, in describing.the Atane 
flora of Greenland in 1882, in returning to this subject, considers 
this form, as well as various simple emarginate Liriodendropsis- 
like forms, as different varieties of Liriodendron Meeku, and in 
this he was subsequently followed by Lesquereux, but not by 
Newberry, who insisted upon the distinctness of the lobate form. 
We find one of these varieties of Heer’s Liriodendron Meekit 
genuina which may belong here, although the leaves are excep- 
tionally large and poorly preserved. Another variety, Lirioden- 
dron Meekii primaeva, includes the slightly lobate forms subse- 
quently referred to Liriodendron primaevum Newberry. It would 
seem that the small entire retuse leaves which have been variously 
referred to Leguminosites, Bumelia, Bignonia, Liriodendron Meekii, 
