Locality

From Hollick (1930) (p. 111)

"Koyukuk River, west bank, about 39 miles above its mouth (original No. 333); collected by F. C. Schrader in 1899 (lot 7472)."

 

Locality Map

 

Description

From Hollick (1930) (p. 111)

"Plate 83, Figure 1"

"Leaf obliquely ovate-reniform, entire, 6 centimeters in length by 7 centimeters in width, broadly wedge-shaped above, rounded-truncate below; apex obtuse; base abruptly subcordate or emarginate; nervation pinnate, craspedodrome; midrib straight; secondary nerves five on each side, subopposite, subparallel, diverging from the midrib at angles of about 45°, the basilar pair with branches from the under sides that subtend acute angles with the secondaries and curve upward along the margin."

 

Remarks

From Hollick (1930) (p. 111)

"This leaf is suggestive of the type represented by Hedera platanoidea Lesquereux (1876; 1883) (p. 351, pl. 3, fig. 3; p. 65, pl. 3, figs. 5 - 6) from the Dakota sandstone of Kansas, and the leaf from the Cenomanian of Bohemia referred by Velenovsky (1882) (p. 26 [19], pl. 8 [6], fig. 7) to Hedera primordialis Saporta (1879) (p. 200, fig. 29) although it is very doubtful if Velenovsky's specimen is referable to this species, as may be seen by comparison of the figures.

The specific name is given in honor of the collector, Mr. F. C. Schrader."