Bulletin 3. The flora of the Raritan Formation, 1911 - State of New ...

200 THE RARITAN FLORA.
variability. They are all coriaceous, trilobate leaves of conside>
able size with long ancl stout petioles, Length 6 cm. to IOcm,
Width 7 cm to te cm. Lobes ovate, pointed or rounded, 1 with
open rounded sinuses, the lateral lobes showing a tendency to
become sublobate below. Primaries slender, camptodrome.
Lesqnereux makes "five nerved from the top of the petiole," a
character of this species as it is in all tile specimens which he
figures and in one or two of Heer's figm'es. These extra laterals
are much more slender than are the regular primaries and are not
constant unless the species be considered composite.
The Coastal Plain leaves referred to this species by Newberry,
Hollick and the writer are as a rule somen,hat smaller in size,
with narrower lobes. This species is infrequent in the Raritan,
and the leaves referred to it are suggestive of what Newberry
called Aralia pate_zs. The species is more abundant in the somewhat
later Cretaceous deposits of Marthas Vineyard and Cliffwood
bluff. It was described originally from the A_:ane beds of
Greenland and is also present in considerable abundance in the
Dakota Group of Kansas.
Occnrr e**ce.--_Voodbridge.
Colleclions._N. Y. Botanical Gardens,
ARALIA ROTUNDILOBA Newb.
dral& rotu_idiloba Newb., F1. Amboy Clays, II8, pl. _8, [. 5;
pl. 36, f. 9, _896.
DescHptiom--Leaves elliptical in outline, palmately five-lobed,
about 8 cm. in length, by m cm. in greatest breadth. Lobes all
stout and rounded or slightly retuse distad, separated by shallow,
rounded, open sinuses. Margins entire. Base truncate.
Petiole long and very stout, Primaries comparatively slender,
3 in number, with a pair of subordinate laterals usually present.
Secondaries slender, camptodrome.
As this species is based upon. infrequent specimens it may
possiMy represent a variety of Aralia Newberryi, some forms
• Retuse in one specimen which Lesquereux refers to this species.
NEW JERSEY GEOLOGICAL SURVEY