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

I66 THE RARITAN FLORA.
Descriptio*_.--Leaves compound, generally of 2, rarely 3,
elliptical or oblong-lanceolate, unsymmetricM, entire, petiolate
leaflets. Leaflets variable in size and cutline, usually considerably.curved
and unsymmetrical, broadest on the outside,
ranging from, 3 cm. to 8 cm. in length and from 1.2 cm. to 3 cm.
in breadth. Apex obtusely pointed to acute, sometimes somewhat
recurved. Base cuneate. Midrib narrow, curved. Secondaries
slender, often seen with difficulty, 6 to 8 pairs, oblique, parallel,
camptodrome, the lower long curved and approximately parallel
with the margins.
This species was described by Lesquereux from rather abundant
remains preserved in the Dakota sandstones of Kansas, and
it has since been recorded from the Raritan or the Magothy formations
of Marthas Vineyard, Long Island artd New Jersey.
The Raritan form is of the smaller, more obtuse type, but is
almost an exact counterpart of Lesquereux's pl. 4z, gg. z4. The
Magothy forms are also smaller than most of.the Dakota Group
forms. Some of these latter are especially interesting in that
they show the entire leaves, which are of the following character :
The common petiole is stout for a distance of from 5 ram. to 15
man., where it forks into two stout branches IO mm. to 15 mm.
long, each subtended by a single leaflet. Occasionally there are
three leaflets instead of the normal two.
A species of Hymenaea was described by Saporta from the
Cenomanian of Bohemia I which shows considerable resemblance
to the American form,. Later collections described by Velenovsky
2 contain many leaves which he identifies with Soparta's
species, Hymenaea primigenia, which he finds is rarely entire
and usually with a crenate-dentate margin. Hollick records 3
forms similar to the latter from the Marthas Vineyard Cretaceous,
which is probably more recent than the New Jersey Raritan.
The fo,nns from the Atane beds of Greenland which Prof.
Heer described as Dalbergla Rinklana 4, are very similar to the
Le Monde des Plantes, p. 199, f. 2, 1879.
JFI. B/ihm. Kreidef. theil 3:9, pl. 5, f. 4; pl. 6, f. 1-4, I884.
Mon. U. S. GeM. Surv., vol. 50 : 84, pl. ,32, f. 8, 9, 19°7-
*FI. Foss, Arct., vol. VI, ab. 2: Io2, pl. 26, f. I-3, 1882.
NEW JERSEY GEOLOGICAL SURVEY