Frullania eboracensis, the New York scalewort or otherwise known as Ralsei's Scalewort, is a species of liverwort in the family Frullaniaceae. New York Scalewort can be distinguished from other species of scalewort by its morphology. In particular, the small size (leafy shoots only 0.8–1 mm. across), lower leaf lobes that are about as long as they are across, lower leaf lobes that are about one-third to one-half the size of upper leaf lobes, underleaves (0.15 mm. across) that are only a little wider than their stems (0.10 mm. across). The underleaves of New York Scalewort have toothless or nearly toothless lateral margins, and perianths that have smooth to slightly roughened keels along their sides (rather than tuberculate keels). Despite some distinctive morphology, microscopy is often necessary to confidently distinguish New York Scalewort from other species of Frullania, and the cells of the leaves have diagnostic irregular, jagged edges and cell walls are swollen at intervals.

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