FOSSIL FLORA. 747 



Creek, top of bluff; collcctrcl by F. H Kiiowhon, Au<i-ust 27, 1888. Aude- 

 sitic breccia, near gulch northwest of peak west of I)uiira\en: collected by 

 J. P. Iddings, Septemlier 12, 1883. Also found on Overlook Mountam, in 

 breccia, at an altitude of 10,070 feet; collected l)v Arnold Hagiie, August 

 G, 1897. Southern spur of Chaos Mountain, at an altitude of 10,100 feet; 

 collected by Arnold Hague, xVugust 11, 1897. Soutli side of Stinkingwater 

 Valley, on high bluff east of mouth of Crag Creek; collected by Arnold 

 Hague, September 4, 1SII7. 



ArALIA SERRLiLATA n. S}). 



PI. CI, fig. :5. 



Leaf apparenth" sul)coriaceous, palmately o-lobed, middle lobe longest, 

 ovate, obtuse; lateral lol)es short, pointing upward; lionlers sharply serru- 

 late, with small, sharp, upward-pointing teeth; secondaries numerous, close, 

 alternate, at an angle of 25° to 40°, curving upward and entering the teeth, 

 or sometimes camptodrome with outside branches to the teeth, usualh* 1 

 tooth between the 2 entered by two contiguous secondaries, which is sup- 

 plied with a branch from the middle of a percurrent nerville, which crosses 

 just l)elow it; nervilles numerous, mainly percurrent and approximately at 

 right angles to the secondaries; finer nervation quadrangulai-. 



This tine and apjiarently characteristic species depends upon the single 

 example figured. It lacks the entire lower portion of the leaf, but 2 lobes 

 are entirely preserved, and a large portion of the other. The central lolie 

 is 4.;") cm. long to the sinus, and the lateral one about 1 cm. higher than the 

 sinus. The distance between the lateral lol)es is 8.5 cm. 



This species has exactly the same size ami shape as many of the 

 3-lobed specimens of Anilid )iot(it(i. Lx.,' found in the same lieds. 



The main difference is in the sharply serrate margins, the teeth extend- 

 ing even down to and through the sinus, and in the secondaries or branches 

 from them entering the teeth. Occasionally, as indicated under the diag- 

 nosis, some of the secondaries are camptodrome, as all are in A. i/otata, with 

 outside liranches passing to the teeth. These species are evidently closely 

 related and may possibly be the same, although probably not, for in 100 

 specimens of A. iiotata not one was found that possessed these teeth. 



As pointed out under the discussion of Aralia mtata (see ante, p. 745), 



'Cf. Lesqiiereux, Tert. Ft, PI. XXXIX, figs. 2, 3. Ward: Types of Laramie II., V\. XXVII,fig. 1. 



