USNM 37491 Populites spatiosus Hollick  

Notes

Hollick (1930)

Pl. 32 Fig. 1

 

 

Locality

From Hollick (1930) (p. 66)

"Yukon River, north bank, about 13 miles below Melozi telegraph station (original No. 3AH12); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3249) (pl. 32, fig. 1). Yukon River, north bank, about 17 miles above Nahochatilton (original No. 2AC236); collected by A. J. Collier and Sidney Paige in 1902 (lot 2963) (pl. 32, fig. 2)."

 

Locality Map

 

Description

From Hollick (1930) (p. 66)

"Plate 32, Figures 1, 2"

"Leaf reniform-orbicular, about 11 centimeters in length by 19 centimeters in width across the middle, with a broad, curved, truncate base and a blunt apex; margin undulate or triangular-dentate except at the base; nervation tripalmate; secondary nerves four on each side, subopposite below, alternate above, subparallel, leaving the midrib at angles of about 40° and extending almost straight to the margin, the upper ones simple, the lower ones branched toward the extremities, the branches leaving the secondaries at acute angles, the secondaries and their branches craspedodrome; lateral primaries slightly suprabasilar, leaving the midrib at angles of about 45°, curving upward, with one or more branches on the upper sides toward the extremities and six or more on the under sides that subtend acute angles of divergence and are branched toward their extremities in a similar manner, the branches and branchlets craspedodrome; tertiary nervation well defined, bent upward and outward throughout, forming flexed quadrangular and polyg"onal areolae."

 

Remarks

From Hollick (1930) (p. 66)

"This species, except that the margin is dentate, somewhat resembles the larger forms of Populites litigiosus (Heer) Lesquereux (1892) (p. 46, pl, 7, fig. 7; pl. 8, fig. 5; pl. 46, fig. 6; pl. 47, fig. 1, [=Populites litigiosus Heer, in Capellini, J., and Heer, O., Les phyllites cretacees du Nebraska: Soc. helv, sci. nat. Nouv. mem., vol. 22, No. 1, p. 13, pl. 1, fig. 2, 1866]) especially his Figure 5 on Plate 8, and it may be identical with the variety denticulata (Knowlton 1919) (p. 482, [=Populites litigiosus denticulata Lesquereux, The flora of the Dakota group: U. S. Geol. Survey Mon. 17, p. 47, 1892]) which he names but does not figure, and in connection with which he remarks: "I have seen * * * a number of leaves with dentate borders * * * They appear to constitute a variety of the species.""