USNM 37498 Populites platanoides Hollick  

Notes

Hollick (1930)

Pl. 34 Fig. 5

 

Locality

From Hollick (1930) (p. 65-66)

"Yukon River, north bank, about 17 miles above Nahochatilton (original No. 2AC236); collected by A. J. Collier in 1902 (lot 2963) (pl. 34, fig. 5). Yukon River, north bank, about 12 miles below Melozi telegraph station (original No. 20); collected by W. W. Atwood and H. M. Eakin in 1907 (lot 4634) (pl. 36, fig. 3)."

 

Locality Map

 

Description

From Hollick (1930) (p. 65-66)

"Plate 34, Figure 5; Plate 36, Figure 3"

"Leaf about 18 centimeters in maximum width across the middle, with a broad, rounded, truncate base and an irregularly triangtilar-serrate-dentate margin; nervation tripalmate, craspedodrome; midrib apparently straight, thickened where it merges into the petiole; secondary nerves subopposite or opposite; lateral primaries obscurely subopposite, slightly suprabasilar, branched on the under sides, the upper branches branched, the lower ones simple and simulating the basilar veinlets below."

 

Remarks

From Hollick (1930) (p. 65-66)

"These fragmentary specimens are strikingly similar to Platanus? wardii Knowlton (1900) (p. 14, pl. 2, figs. 1 - 4) from the Upper Cretaceous of Montana, especially the basal portion of the leaf represented by our Figure 5, Plate 34, which is almost identical ,with Knowlton's Figure 4. They each have the same broad, rounded, truncate base with dentate margin and the same abnormally thickened upper part of the petiole. So far as size is concerned a comparison of the figures is misleading, for the reason that Knowlton's figures represent only the smaller leaves, as indicated by the description, in which it is stated that they range frorp 4 to 11 centimeters in width. The question in connection with the generic reference can not be satisfactorily answered unless more perfect specimens are available for critical examination; but in so far as the visible characters are concerned the specimens depicted might belong to either Popuilites or Platanus."