New plant fossil records and paleoclimate analyses of the late Pliocene Citronelle Formation flora, U. S. Gulf Coast Stults, DZ Axsmith, BJ Palaeontologia Electronica 2015 New York, N. Y.: 1991 2015-09-30 2 6 1 35 RHRS (Michaux, 1811) Nuttal, 1818 Nuttal 1818 Michaux 1811 [211,773,1694,1720] Magnoliopsida Juglandaceae Carya true Plantae Fagales 9 10 Tracheophyta species aquatica   Figure 3.1 – 3.2, 3.5  Description.Approximately 18 leaflet specimens represent  Caryacf. aquatica. Leaflets are oblong or elliptical, a few are ovate, and L:W ratios are mostly> 3:1. Many have an asymmetrical lamina, thus displaying the distinctive curvature common in this species. Sizes range from 3.2–8.5 cmlong and 0.8–3.5 cmwide. Bases are cuneate and mostly asymmetrical. Apices are straight and acute. Secondary veins are numerous, often irregularly spaced, with increasing angles from 45º apically to 75º (or greater) basally. Tertiary veins are mostly opposite percurrent (straight or sinuous), although some are alternate percurrent. Margins are often entire, but sometimes with a few, small teeth that are usually straight distally and straight or convex proximally. Often, however, the margins appear erose rather than serrate. Peltate scales are often visible under epifluorescent light ( Figure 3.2).  Site occurrence.Scarborough School.   Remarks.  Carya aquaticatoday occurs in floodplain forests along a wide area of the southeastern coastal plain. It is remarkable that no fruits clearly assignable to this species have been recovered from the Citronelle Formation despite the abundance of leaflets with convincing features, which is one of the major reasons a “cf.” designation was used here.