Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 2
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 3
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 3
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 4
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 4
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 5
Alan Cressler:
Asplenium scolopendrium var. americanum, Alabama 6
Alan Cressler:
Asplenium scolopendrium var. americanum, Habitat, Alabama 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Habitat, Alabama 5
Alan Cressler:
Harts Tongue Pit, Asplenium scolopendrium var. americanum, Habitat, Marion County, Tennessee 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Jackson County, Alabama 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Jackson County, Alabama 2
Alan Cressler:
Asplenium scolopendrium var. americanum, Morgue Sink, Scanned Photo, March 1993, Jackson County, Alabama 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Morgue Sink, Scanned Photo, March 1993, Jackson County, Alabama 2
Alan Cressler:
Asplenium scolopendrium var. americanum, Tennessee 1
Alan Cressler:
Asplenium scolopendrium var. americanum, Tennessee 2
Alan Cressler:
Asplenium scolopendrium var. americanum, Tennessee 3
Alan Cressler:
Asplenium scolopendrium var. americanum, Tennessee 4
Alan Cressler:
Asplenium scolopendrium var. americanum, and Cystopteris bulbifera, Alabama 1
Alan Cressler:
Asplenium scolopendrium var. americanum, and Cystopteris bulbifera, Alabama 2
Alan Cressler:
Asplenium scolopendrium var. americanum, and Cystopteris bulbifera, Alabama 3
Alan Cressler:
Asplenium scolopendrium var. americanum, and Cystopteris bulbifera, Alabama 4
Alan Cressler:
Asplenium scolopendrium var. americanum, juvenile sporophytes, Alabama 1
Alan Cressler:
Habitat, Asplenium scolopendrium var. americanum, Alabama 1
Alan Cressler:
Habitat, Asplenium scolopendrium var. americanum, Alabama 2