Fragilariaforma virescens - (Ralfs) Williams & Round

This diatom occurs in streams throughout the park, but never in great abundance.



It has been collected as an epiphyte or in mixed epilithic periphyton in 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 westernmost tributary of the Oconaluftee River, Swain Co., NC, Bradley Fork, northernmost tributary of the Oconaluftee River, Swain Co., NC, Cooper Creek, a tributary of the Tuckasegee River, Swain Co., NC, Indian Creek, eastern tributary of Deep Creek, Swain Co., NC, Madcap Branch, Little Pigeon River, Middle Prong, near Hiking Club cabin, Greenbrier, Sevier Co., TN, Ramsey Prong, tributary of the Middle Prong Little Pigeon River, Sevier Co., TN and TW (Twin Creeks?).