USNM 37642 Zizyphus abnormalis Hollick  


Hollick (1930)

Pl. 79 Fig. 8



From Hollick (1930) (p. 103-104)

"Yukon River, north bank, at Fossil Bluff, about 6 miles above Nahochatilton (original No. 2AC238); collected by A. J. Collier and Sidney Paige in 1902 (lot 2962)."


Locality Map



From Hollick (1930) (p. 103-104)

"Plate 79, Figure 8"

"Leaf ovate-lanceolate, 4.75 centimeters in length by 2.5 centimeters in maximum width, tapering above to the apex and below to a rounded cuneate base; margin obscurely crenate-serrate-dentate in the upper part; nervation tripalmate from the base, one lateral primary simple, curved, acrodrome, the opposite one flexed or angled, diverging from the midrib, thinning out and disappearing close to the margin in the upper part of the leaf, each with branches on the outer side that are camptodrome below and craspedodrome above; secondary nervation represented by a single nerve that leaves the midrib at an obtuse angle, curves upward, and ultimately coalesces with the attenuated end of the adjacent lateral primary."



From Hollick (1930) (p. 103-104)

"It is possible that this species may be based upon an abnormal leaf. The inequilateral character of the nervation is peculiar. If only the left side of our leaf were preserved, its reference to the genus Zizyphus would hardly be questioned, whereas the opposite side, taken by itself, would probably be referred to some other genus. The general zizyphoid characters of the leaf, however, appear to be dominant."