Psammothidium marginulata
- (Grunow) Bukhtiyarova & Round
- This diatom occurs in many streams throughout the park.
- We have records from Abrams Creek, west end of park from Cade’s Cove to Chilhowee Lake, Blount Co., TN, Bower Creek, a tributary of Forge Creek in Abrams Creek watershed, Blount Co., TN, Beech Flats Prong, the western most tributary of the Oconaluftee River, Swain Co., NC, Camel Hump Creek, a tributary of Cosby Creek, Cocke Co., TN, Fighting Creek, tributary of the West Prong of the Little Pigeon River, Sevier Co., TN, Little Pigeon River, Middle Prong, near Hiking Club cabin, Greenbrier, Sevier Co., TN, and Ramsey Prong, tributary of the Middle Prong Little Pigeon River, Sevier Co., TN.