USNM 37585 Pseudoaspidiophyllum memorabile Hollick  

Notes

Hollick (1930)

Pl. 61

 

Locality

From Hollick (1930) (p. 96-97)

"Yukon River, north bank, about 3 miles below Blatchford's mine (original No. 3AH21); collected by Arthur Hollick and Sidney Paige in 1903 (lot 3260)."

 

Locality Map

 

Description

From Hollick (1930) (p. 96-97)

"Plate 61 "

"Leaf 20 centimeters or more in length by 20 centimeters or more in maximum width, trilobate or sub-trilobate; margin wavy-dentate; nervation pinnate tripalmate; lateral primaries suprabasilar, diverging from the midrib at obtuse angles, rather abruptly curved upward and then becoming straight, branched un the under sides, the branches irregularly arranged, subhorizontal, forked toward the extremities, ultimately craspedodrome; secondary nerves three or four on each side of the midrib, arranged in subopposite pairs, leaving the midrib at obtuse angles of divergence, soon abruptly bent or curved upward, then continuing almost straight or slightly curved backward and finally forking, the ultimate ramifications craspedodrome to the dentitions; tertiary nervation subhorizontal above, at right angles to the secondaries below, mostly simple and slightly bent, occasionally forked and reticulated."

 

Remarks

From Hollick (1930) (p. 96-97)

"It is with some hesitation that I have included this species in the genus Pseudoaspidiophyllum, for the reason that the essential basilar characters are destroyecl, and it is impossible to determine if the leaf was peltate. The lateral primaries, however, are undoubtedly suprabasilar. It may also be noted that they are not exactly opposite and that the upper one is stronger than the other and more distinctly curved. The secondary nerves on the same side as the stronger lateral primary also appear to possess similar characters, indicating that the leaf was not strictly equilateral."