KNOWLTON.I DESCRIPTION OF SPECIES. 71 



Fuinily CELASTRACPLE. 



CeLASTKUS DIGNATUS 11. sp. 

 PI. XI, %. 5. 



Leaves membranaceous, elliptical, or slightly obov^ate-elliptical in 

 shape, truncate, or ver}' obtuse and somewhat unequal-sided at base, 

 truncate at apex; margin coarsely toothed, the teeth olituse, upward 

 pointing; petiole short and thick; midrib thick; secondaries about 10 

 pairs, alternate, at a low angle, craspedodrome, passing to the marginal 

 teeth; nervilles numerous, mainly unbroken, at right angles to the 

 secondaries; iiner nervation, producing numerous small, irregularly 

 quadrangular meshes. 



Several specimens represent this species, all being of about the same 

 size. The}" are in general elliptical-obovate, ver^'^ obtusely wedge- 

 shaped or truncate at base and rounded at apex. They are 4 cm. in 

 length and 3 to 3.5 cm. in width. The petiole, preserved in only one 

 example, is 5 mm. long and 2 mm. thick at the point of attachment. 

 The toothed margin and characteristic nervation are well shown in 

 the figures. 



This species seems to have some affinity with Celastrus Ineequalh 

 Knowlton "■ from the Fort Union beds in the Yellowstone National 

 Park. This differs, however, in being a much larger leaf, toothed 

 only above the lower third of the blade, the teeth being also more 

 obtuse. The general appearance of the two species, however, is 

 strikingly similar. 



LocdUty. — Mascall beds. Van Horn's ranch, a))out 12 miles west of 

 Mount Vernon, Grant County, Oregon. Collected ])y Knowlton and 

 Merriam, July, 1901 (U. S. Nat. Mus., No. 8530). 



Celastrus confluens, n. sp. 

 PL II, figs. 1-3. 



Leaves membranaceous, elliptical in shape, wedge-shaped and slightly 

 unequal-sided at base, obtuse but not truncate at apex; margin toothed, 

 the teeth quite large, sharp pointed; midrib strong; secondaries, about 

 twelve pairs, mainly alternate, at an angle of about 45' on one side of 

 the blade and nearly a right angle on the other, camptodrome, arch- 

 ing very near the margin or forking and sending branches to the 

 teeth; nervilles and finer nervation as in the last species. 



This form is represented by several quite perfect leaves, which ma}'' 

 possibly belong to the last species, but they are much larger and are 

 unaccompanied by examples of intermediate size, so that it has seemed 

 best to give them tentativeh" a new name. The best preserved 

 example, which is also the largest, is 9 cm. long and 5 cm. wide. The 



aMon. U. S. Gcnl. Snrv., PI. XCVIII, fig. 3. 



