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

GERANI-_LES. 169
Order
Family
GERANtALES.
RUTACEe]E.
Genus C1TROPHYLLUM Berry.
(Bull, Torrey Club, col. _6, I9o9 p, 258.)
Cr_RO_YLLU_ aLic-_e,a (Lesq.) Berry.
Plate XXI, Figs. I_.
Ficu¢ aligera Lesq., FI. Dakota Group, 84, pl. zo, f. 3-6, r892.
Berry, Rept. State Geologist (N. 3".) for I9O5, I39: 19o6.
Bull, T'orrey. Club, col. 33 : 172, 19o6.
Citrophyll_m a_igera Berry, Bull. Torrey Club, col. 36 ',258, pl.
zSa,//gs, z-8, I9o 9.
Description,--Leaves, small, elliptical to ovate or ovateqaneeolate
in outline, coriaceons in texture, varying from 2.5 cm. to 6
era, in length by 1.8 era. to 3,2 cm. in breadth. Margins entire,
occasionally slightly undulate. Apex rounded or obtusely
acuminate. Base rounded, sub-truncate or ctmeate, Petiole
stout, from .7 cm. to 2 cm. in ler_gth, conspicuously alate. The
petiolar wings may be oblong4auceolate in outline or obovate,
together they are from 2. 8 ram. to 5 ram. in width, averaging
about 3.5 mm. Midrib stout. Secondaries flue, more or less
obscured by the eoriaceous'leaf substance, about 9 alternate pairs,
branching from the midrib at angles of from 45° to 5o°, parallel,
camptodrome.
These curious leaves were described by LesqueretL_: from the
Dakota Group as a species of Ficus and compared with Fieus
bmnelloides Etting's,, and Ficus m_dgei Lesq., neither of which
has alate petioles, while the first has an emarginate apex, Subsequently
the. same leaves were found in the Magothy formation
of New Jersey, and only recently a single small leaf was found
in the upper Raritan beds at South Am'boy. They exhibit considerable
variability in outline, but all have exactly the same
aspect and conspicuous atate petiole. They appear to be related
to the leaves of the modern genus Cftrua. The latter have ex-
NEW JERSEY GEOLOGICAL SURVEY