STRATIGRAPHY OF THE SKYKOMISH BASIN 575 



Ficus sp. ? (Knowlton) 



Knowlton: Rept. on Fossil Plants Associated with Lavas of Cascade Range 

 (Western Oregon) (1898), p. 46; PL III, Fig. 1. 



In shales (F 831+50) a specimen very similar to Knowlton's 

 figure, in the roundly notched margin, and the 45 angle of emer- 

 gence of the secondaries, was found. Here also no base or tip was 

 to be seen. 



Genus Hicoria 



Hicoria (Carya) antiquorum (Newb., Knowlton) 



Newberry: Ann. N.Y. Lye. Nat. Hist., IX, (April, 1868), 72. 



Illust. Cret. and Tert. Plants (1878), PI. XXIII, Figs. 1-4. 

 Lesquereux: Later Extinct Floras of N. Am. (1868), p. 35, PI. XXXI, Figs. 1-4. 



Tertiary Floras (1878), VII, 289; PI. I, Figs. 1-5; Vol. VIII, PI. I, Fig. 2. 

 Knowlton: Tertiary Plants of N.Am. (1898), p. 117. 



Fossil Flora of Yellowstone Park, etc. 



This form is found in the sandy F 844 beds. It is referred to 

 these species rather than to Juglans nigella, because the teeth are 

 here rounded, as in Hicoria, and the secondaries are less prominent 

 than in /. nigella. The leaf narrows gently toward the base and 

 joins the stem (midvein) by a quarter-inch long winged "petiole." 

 The form is noted by Newberry and by Knowlton from Eocene 

 beds (Planalus) at the mouth of the Yellowstone River. 



Genus Juglans 

 Juglans acuminata (Ffeer) 



Heer: Flora Tert. Helvetiae, p. 88; Taf. CXXIX, Figs. 2-8. 



Flora Foss. Arct., VII, "Gronlands," 761; Taf. LXXV. 

 Knowlton: "Fossil Plants from Kukak Bay," Alaskan Exp., IV (1904), 152; 

 PI. XXXIII, Fig. 3. 



The form is identified from fragments only, but these are 

 rather numerous. The entire margin and the angle of the midrib 

 and secondaries are very similar in these specimens and in Heer's 

 figures, but show considerable dissimilarity to Knowlton's type, 

 where the angle between the midrib and secondaries is larger and 

 where the latter are alternately long and short and bowed. The 

 form, according to Heer, "is spread through the whole Tertiary 

 and possesses many synonyms." 



