GREWIA CRENATA (Unger) Heer.
GREWIA CRENATA (Unger) Heer, FL. Tert. Helv., Vol.
III, p. 42, Pl. CIX, figs. 1221; Pl. CX, figs. 111, 1859;
Ward, Types of the Laramie Flora, p. 85, Pl. XXXIX, fig. 1, 1887;
Newberry, Later Extinct Floras, p. 120, Pl. XLVI, fig. 2; Pl. XLVII,
figs. 2, 3, 1898 (1899).
Paliurus colombi Heer. Lesquereux, Proc. U. S.
Nat. Mus., Vol. XI, p. 16, 1888.
Grewia crenata was first found in this area at
Bridge Creek, and the specimens figured by Newberry, as well as a number
of others since obtained, are before me. They not only agree
among themselves but quite closely, indeed, with the figures of this
species given by Heer. There can be no reasonable doubt as to their
identity.
A number of specimens have been found in the Mascall
beds at Van Horn's ranch and vicinity that must also be referred to
Grewia crenata. The single example referred by Lesquereux to
Paliurus colombi probably belongs here, although it is very much
like certain forms of Populus Zaddachi from the Auriferous
gravels of California. The leaves, three in number, from the Mascall
beds are a little narrower than those from Bridge Creek, and are
somewhat more deeply cordate or auriculate at base, but the differences
are not sufficient to warrant separating them.
Locality.Bridge Creek, Oregon. Collected
by Rev. Thomas Condon (U. S. Nat. Mus., Nos. 7077, 7078, 7079) and Maj.
Charles E. Bendire (U. S. Nat. Mus., No.9532). Mascall beds, Van Horn's
ranch and vicinity. Collected by Major Bendire (U. S. Nat. Mus., No.
2542) and by Knowlton and Merriam July, 1901 (U. S. Nat. Mus., Nos.
8990, 8991).
GREWIA AURICULATA Lesq.
GREWIA AURICULATA Lesq., Cret. and Tert. Fl., p. 252,
Pl. LV, fig. 1, 1883.
This species appears to rest on the single example
figured as the type. None of the recent collections contain it, although
there are a number of specimens of G. crenata.
The type of G. auriculata should be in the
University of California, but it can not now be found. If it has been
correctly figured it seems to be very different from the other leaves of
Grewia found in the same beds, although it may be only an abnormal form
of that species.
Locality.Bridge Creek, Grant County,
Oregon. Collected by Rev. Thomas Condon.