Wardiaphyllum L.Hickey

Plant Fossil Names Registry Number: PFN002013

Act LSID: urn:lsid:plantfossilnames.org:act:2013

Author: L. Hickey

Rank: genus

Reference: Hickey, Leo J. (1977): Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota. – Memoirs of the Geological Society of America 150: 1–181, 55 pls.

Page of description: 150

Original diagnosis/description

Leaf ovate; apex acute; base truncate to slightly subcordate but always decurrent where joining the petiole; margin with prominent sharp, narrow, somewhat irregularly placed teeth. Venation pinnate, simple or semicraspedodromous to brochidodromous; secondaries diverging at narrow angles, lower ones downcurved; loop-forming branches of the secondaries, where present, joining superadjacent secondaries in an acute angle. Tertiaries originating from both sides of secondaries at acute angles, thin, percurrent, exarcuate, recurved near the midrib; tertiaries usually interspersed with one or two subparallel, retroflexed quaternary veins; fourth and fifth order veins fine; fourth order weakly orthogonal, fifth random; a fimbrial vein present.

Etymology

The genus is named for Lester F. Ward who first described the type species.