Locality
From Hollick (1930) (p. 95)
"Yukon River, north bank, about 12 miles below Melozi telegraph station (original No. 3AH11); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3248) (pl. 69, fig. 1). Yukon River, north bank about 7 miles below Blatchford's mine (original No. 3AH20); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3259) (pl. 69, fig. 2). Yukon River, north bank, about 8 miles below Kaltag (original No. 3AH29); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3268) (pl. 70, fig. 3). Yukon River, north bank, in the vicinity of Nulato; collected by W. H. Dall in 1866 (pl. 72, figs. 1, 2). Yukon RIver, north bank, about 6 miles above Nahochatilton (original No. 3AH16); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3252) (pl. 73, fig. 4a)."
Description
From Hollick (1930) (p. 95)
"Plate 69, Figures 1, 2; Plate 70, Figure 3; Plate 72, Figures 1, 2; Plate 73, Figure 4a"
"Leaves large, orbiqulate, peltate, about 16 centimeters in length by 18 centimeters in width, margin dentate above, denticulate below; nervation craspedodrome, pinnate subpalmate, consisting of a strong midrib and three or more pairs of subopposite, widely spaced, upward-curving secondary nerves, the lowest pair strongest, simulating lateral primaries, with five or six branches on the under sides, the upper branches upward curved and forked, the lower mostly straight and simple; basilar veinlets flexuous, forked, and anastomosed into a network that covers the basal portion of the lamina of the leaf, the main veinlets extending to and terminating in the adjacent teeth."
Remarks
From Hollick (1930) (p. 95)
"The exact shape of these leaves is not determinable from the available specimens, all of which are defective in their upper parts; but apparently their width was somewhat greater than their length, and the base was more or less asymmetrical. They may perhaps represent a large form of Pseudoprotophyllum comparabile (see p. 94; pl. 63, fig. 1; pl. 70, figs. 1, 2; pl. 71, fig. 2; pl. 73, fig. 2); but until other and more perfect specimens of both are available for comparison and satisfactory identification a specific distinction between them may be assumed.
A somewhat analogous species is Protophyllum undulatum Lesquereux (1892) (p. 189, pl. 42, fig. 2) in which, however, the lower secondary nerves are more inclined to the horizontal and are less differentiated in rank from the upper secondaries than they are in this and in other species of Pseudoprotophyllum."