Terrestrial, occasionally epiphytic, fern. Rhizome short-creeping, scaly, the scales narrowly ovate, c. 1 cm long, with brown cell walls, apex long-attenuate, margin with few cilia. Stipe brown, becoming green above, 30–40 cm long, 2–5 mm diam., covered with short, appressed and scattered scales similar to rhizome, easily rubbed off. Lamina 2-pinnate to 3-pinnate-pinnatifid, ovate, 16–60 cm long, 14–40 cm wide, laminae or portions of laminae bearing sori markedly different from laminae or portions of laminae not bearing sori, some laminae with sori throughout, other laminae devoid of sori, others bearing sori toward apex but without sori near base and transitional in middle, dark green, with small, scattered scales below or glabrescent. Primary pinnae in 8–24 pairs, lanceolate-deltoid; apices acute; longest pinnae near base, 12–20 cm long, 3–8 cm wide. Secondary pinnae without sori ovate to deltoid, 15–36 mm long, 10–20 mm wide, unequally cuneate at base, with toothed margins. Secondary pinnae with sori, 1-pinnate to 1-pinnate-pinnatifid, lanceolate to deltoid; longest pinnae 30–55 mm long, 18–30 mm wide; ultimate segments linear, 3–15 mm long, 1–2 mm wide. Sori 4–12 mm long, marginal. Exospores 30–32 × 21–24 μm (means).
A sterile hybrid between Asplenium dimorphum and A. bulbiferum G.Forst., named A. ×lucrosum Perrie & Brownsey (Perrie et al. 2005) is one of the most commonly cultivated Asplenium in southern Australia. It is perpetuated by vegetative plantlets (bulbils), a character inherited from A. bulbiferum.
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