- Hymenophyllum
Key to the species of Hymenophyllum
1Lamina without a black margin2 3Lamina 2–3-pinnate; primary pinnae divided on both sides; indusium obovoid with lips bluntly dentate; primary pinnae with only one sorusHymenophyllum cupressiforme 3Lamina 2-pinnate; primary pinnae divided only on side towards frond tip; indusium narrowly elliptic with lips entire; primary pinnae with 1–4 sori close togetherHymenophyllum peltatum 4Frond erect; stipe with prominent wing extending almost to base; lamina dark green 2–3-pinnate; sori often paired, usually not immersed in laminaHymenophyllum australe 4Frond usually pendent; stipe without prominent wing (sometimes with slight wing at top of stipe); lamina pale green, 1–3-pinnate; sori borne singly, partly immersed in lamina5 5Stipe with tuft of straw-coloured hairs at base; lamina 2–3-pinnate; pinnae rhomboidal to fan-shaped; sori usually slightly wider than segmentHymenophyllum flabellatum 5Stipe with at most a few hairs at base; lamina 1–2-pinnate; pinnae with few linear segments; sori narrower than segmentHymenophyllum rarum Modified from: Entwisle, T.J. (1994). Ferns and allied plants (Psilophyta, Lycopodiophyta, Polypodiophyta). In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria. Vol. 2. Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
