KNOWLTON.] DESCRIPTION OF SPECIES. 23 



in thickness. The sheaths are short and pro\i(lod Avith short, obtuse 

 dentations. The teeth are nearly obsolete. The number of striations, 

 as nearl}' as can be made out, is ])etween forty and fifty. 



Localitie^s. — Currant Creek, Oregon. Collected b}" 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. Ilornii, U. S. Nat. Mus. , No. 2464, 

 41 specimens); by Mcrriam's party in 19()() (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 Mer- 

 riam's expedition of 1900 (Mus. Univ. Cal., Nos. 184, 185, 9lo, 922). 



Equisetum sp. 



PI. I, fig. 1. 



The collection contains a small fi-ao-mcnt 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 nun. 

 long and 4 nun. l)road at the uppei- extremity. It Is not well enough 

 preserved to show the full character of the sheath, but as nearh' as 

 can 1)(^ made out it was provided with about 16 ribs and presumably 

 an equal lumiber of sharp teeth. 



Locality. — Gulch 1 mile northeast of Belshaw's ranch, Grant Count}^, 

 Oregon. Collected by Knowlton and Merriam, July, 1901 (U. S. 

 Nat. Mus., No. 8503). 



Family GINKGOACE^. 



Ginkgo sp. 



PI. I, fig. 5. 



The collection contains a fragment of what appears to be a leaf of 

 Ginkgo, ])ut it is too nuich broken to make out any of the essential 

 characters. The most that can be said is that it must have been a large 

 leaf as compared with the living species. 



Locality. — Mascall beds, Van Horn's ranch, about 12 miles west of 

 Mount Vernon, Grant County, Oregon. Collected by John C. Mer- 

 riam, July, 1901 (U. S. Nat. Mus., No. 8536). 



Family FINACE^. 

 Sequoia Heerii Lesq. 



Sequoia Heerii Lesq., Tert. Fl., p. 77, PI. VII, figs. 11-13, 1878; Newberry, Later 

 Extin(;t Floras, p. 20, PI. XLVII, flg. 7, 1898. 



In the Later Extinct Floras there is a fine figure of this species, but 

 according to the note by the editor. Dr. Hollick, there was no clew to 

 the localit}' whence the specimen came. The original is not now in 



