EQUISETUM OREGONENSE Newb.
EQUISETUM OREGONENSE Newb., Proc. U. S. Nat. Mus.,
Vol. V, p. 503, 1883; Later Extinct Floras, p. 14, Pl. LXV, fig. 7, 1898.
Equisetum Hornii Lesq., Proc. U. S. Nat. Mus.,
Vol. XI, p. 23, 1888.
After a careful examination of the forty or more
specimens of Lesquereux's E. Hornii I am convinced that they are
the same as Newberry's E. oregonense. They are better preserved
than Newberry's material, many of them not being compressed in the
least. Two or three flat specimens have a width of fully 3 cm., and the
non-compressed examples range from 1.25 cm. to over 1.5 cm. in diameter.
Several of the diaphragms are preserved without distortion. They are
from 1.25 to 2 cm. in diameter and evidently several millimeters
in thickness. The sheaths are short and provided with
short, obtuse dentations. The teeth are nearly obsolete. The number of
striations, as nearly as can be made out, is between forty and
fifty.
Localities.Currant Creek, Oregon. Collected by
Rev. Thomas Condon (type of E. oregonense, which is in Mus.
Columbia Univ., N. Y.). Cherry Creek, Crook County, Oregon. Collected by
Maj. Charles E. Bendire (type of E. Hornii, U. S. Nat. Mus., No.
2464, 41 specimens); by Merriam's party in 1900 (Mus. Univ. Cal., Nos.
184, 185, 922), and by Knowlton and Merriam in 1901 (U. S. Nat. Mus.,
No. 9067). Also 3 miles above Clarnos Ferry. Collected by Merriam's
expedition of 1900 (Mus. Univ. Cal., Nos. 184, 185, 910, 922).
EQUISETUM sp.
Pl. I, fig. 1.
The collection contains a small fragment that appears
to represent a short portion of the stem and a single sheath of an
Equisetum. The stem is about 0.5 cm in diameter, while the sheath is
about 8 mm. long and 4 mm. broad at the upper extremity. It is not well
enough preserved to show the full character of the sheath, but as nearly
as can be made out it was provided with about 16 ribs and presumably an
equal number of sharp teeth.
Locality.Gulch 1 mile northeast of
Belshaw's ranch, Grant County, Oregon. Collected by Knowlton and
Merriam, July, 1901 (U. S. Nat. Mus., No. 8503).