This distinct taxon deserves at least subspecies status, and W has supported full species status.However, there is some evidence of intergradation with latiusculum; see citations of W. P. pseudocaudatum is most common on the southeastern Coastal Plain, especially in dry sandy woodlands, but it extends north locally into the Ohio Valley and central Appalachian region (FNA 2; W, iNaturalist.org). It differs from typical latiusculum in the more elongated terminal segments of well-developed pinnules (with L/W ca. 5-15 versus 2-4), especially the tips of basal-most pinnules of basal pinnae (which average 25% versus 12% of the whole pinna length). Also, it has glabrous to sparsely pilose leaf margins, lower rachis and costae surfaces (versus more or less shaggy pubescent).