长白山小阴地蕨

Trophophore stalk 0--1 mm; blade dull to shiny green to dark green, deltate, 1--2-pinnate, to 6 × 7 cm. Pinnae to 5 pairs, ascending, approximate, distance between 1st and 2d pinnae not or slightly more than between 2d and 3d pairs, linear to broadly lanceolate, entire to divided to tip, margins with distinct lobes or segments, apex acute to rounded, venation pinnate. Sporophores 1--3-pinnate, 1--2.5 times length of trophophore, divided into several equally long branches (all other botrychiums have a single stalk or 1 dominant and 2 smaller). 2 n =90.

Osmunda lanceolata S.G. Gmelin, Novi Comment. Acad. Sci. Imp. Petrop. 12: 516. 1768