The new invader was first discovered in 1996 in Patapsco State Park in Maryland (Peterson et al, 1999). 15 years later, it had spread to thousand of acres in Maryland, Virginia, and even one spot in Pennsylvania. But its origin in the USA was at this park, and on the way home from Shenandoah we visited it for a very short while to see first hand its presence in the park.
We entered the Cascade Falls Trail using the Cascade Trail North Carpark, and a short walk of around 15 min quickly took us to one of the falls. At the falls itself I was interested in seeing a single plant growing from between two smooth rocks in front of the waterfall, and nearby was a young colony at the base of a tree.
|A single specimen peeking out from rocks near the waterfall|
|Damage from leaf miners|
|Clumps of O. undulatifolius along Cascade Falls Trail, with some of the individuals showing leaf damage.|
|Masses of O. undulatifolius on the side of a small hill, I used a telephoto lens to view it.|
Peterson, P.M., E.E. Terrell, E.C. Uebel, C.A. Davis, H. Scholz, and R.J. Soreng. 1999. (Scientific Note) Oplismenus hirtellus subspecies undulatifolius, A new record for North America. Castanea 64:201-202.