572 



WARREN S. SMITH 



margins is seen. Secondary veins are seen to fork twice, as in 

 Heer's Fig. ie, though from his description he found such nervation 

 rare. 



Genus Sabal 



Sabal poii'dli (Newb.) 



Newberry: Proc. U.S. Nat. Mns., V (March 21, 1883), 504. 

 Later Extinct Floras of North America, p. 30; PI. LXIII, Fig. 6; PI. LXIV, 

 Figs. 1-19; Tertiary (Green River group) age of Wyoming. 



Palms are represented in these beds, chiefly in F 831+50 and in 

 F 865, by numerous perfectly preserved specimens of this type. In 

 some cases both upper and lower surfaces of the petiole of one leaf 

 were preserved. The forms agree in all respects with Newberry's 

 type. 



Gymnospermae 



Gymnospermae are represented by countless fragments of 

 Glyptostrobus, Sequoia, and Taxodium— this last in greatest abun- 

 dance. The greatest number of these 

 forms is found in the shales of F 831-I-50. 



Genus Glyptostrobus 

 Glyptostrobus ungeri (Heer) 



Heer: Flora Tert. Helvetiae, I, 51; Taf. XIX, XX, 

 Fig. 1; Taf. XLIX, Fig. 50. Newberry: (G. 

 Europaens Brogn.): 1. Annals N.Y. Nat. Hist., 

 IX (1868), 43- 



2. Illus. Cret. and Tert. Plants (189S), PI. XI, 

 Figs. 6-80. 



3. Later Extinct Floras of N.Am., p. 24; 

 PI. XXVI, Figs. 6-Sa; PI. LXV, Figs. 3-4. 



Fig. 5. — A, Sequoia 

 nordenskioldii; cone in cross- 

 section (natural size). B, 

 Asplenium cascadia. C, Tax- 

 odium distichum miocoutm. 

 (5 natural size.) 



Xo cones of this species were found, 

 but the general form of these fragments 

 is like the Figs, ie and 1a of Taf. XX, 

 and of Fig. 50 of Taf. XLIX of Heer. They also resemble 

 quite closely those from Birch Bay, Washington, figured by 

 Newberry (see 3 above) on Plate LV. Those were of Fort Union 

 age. 



