Click the number at the start of a key lead to highlight both that lead and its corresponding lead. Click again to show only the two highlighted leads. Click a third time to return to the full key with the selected leads still highlighted.
..2 Fronds 1.0-1.3× as long as wide, 0.4-1.2 mm wide
..2 Fronds 1.3-2.0× as long as wide, 0.3-0.5 mm wide
....3 Frond 1.3-2.0× as long as wide, the upper side slightly convex, with an upward point apically
....3 Frond 1.0-1.5× as long as wide, the upper side with a prominent papilla centrally