Porella navicularis (Tree ruffle liverwort)

9/22/2023 · Moxie Falls, Moxie Gore, Maine · ≈ 6 × 4″ (15 × 10 cm)

9/22/2023 · Moxie Falls, Moxie Gore, Maine · ≈ 3½ × 5″ (9.2 × 13 cm)

9/22/2023 · Moxie Falls, Moxie Gore, Maine · ≈ 6 × 4″ (16 × 11 cm)

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Division	Hepatophyta	Liverworts: simple, non-vascular plants
Subdivision	Hepaticae	Thallose and leafy liverworts
Class	Hepatopsida	Liverworts with prostrate form, extending horizontally, with leaflike form
Subclass	Jungermanniae	Hepatic mosses, named for botanist Ludwig Jungermann
Order	Jungermanniales	Liverworts with thin leaf-like flags on each side of the stem; other liveworts lack evidence of leaves
Family	Porellaceae
Genus	Porella
Species	navicularis