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

218 THE RARITAN FLORA.
Genus CHONDROPHYLLUM Necker.
(Elem. Bot., voL II., i79o, p, 347.i
CHONDROPHYLLUN[ 0BOVAT_JN Newb.
Chondrophylh_m obovatum Newb., F1. Amboy Clays, 118, pl. 42,
[. _6, eL z896.
Description.--Leaves small, orbicular or obovate in outline,
1.3 cm. to 2.6 cm. in length, by I era. to 2 era. in greatest breadth,
which is the upper half of the leaf. Margins entire. Apex
rounded, sometimes slightly emarginate. Base more or less
cuneate. Midrib slender, much attenuated. Secondaries slender,
about six pairs, branching at acute angles, camptodrome. Areolation
polygonal.
These leaves {Grin an inconspicuous element in the Raritan
flora and there is very little ground either for or against their
reference to Chondrophyllum, The genus is poorly defined and
its relations are problematical. It seems very probable that it is
composite and its relations have been thought to be with the
Vitaceae and the Araliacea:. One species at least, as the writer
will show in his description of the North Carolina Cretaceous
flora, is not a dicotyledon at all, but is clearly allied with the
modern monocotyledonous genus Pistie,
Occurrence,--Woodbridge.
Collectiona.--N. Y. Botanical Garden.
CHONDROP]_YLLU_f RETICULATUt_[ HolHck."
Chondrophyllum retieulatum Hollick in Newb., FI. Amboy Clays.
119, ft. 4 I, f. 6, 7, 1896,
Description.--Leaves delicate, apparently broadly orbicular in
outline, 3 era. to 3-5 em. in length by 3 era. to 4 cm. in breadth,
with broadly rgunded apex and a cuneate base. Petiole present.
stout. Midrib slender. Secondaries 4 to 5 alternate pairs,
parallel, slender, branching at an acute angle, camptodrome, distally
merging in the tertiary reticulations.
NEW JERSEY GEOLOGICAL SURVEY