Microsorum pustulatum subsp. howense (Tindale & P.S.Green) Bostock APNI* Synonyms: Phymatosorus pustulatus subsp. howensis Tindale & P.S.Green APNI* Microsorum diversifolium (G.Forst.) Copel. APNI*
Description: Epiphytic, lithophytic or terrestrial ferns. Rhizome creeping, 4–10 mm diam.; scales broadly lanceolate, 3–5 mm long, 1.5–3 mm broad, acute to abruptly acuminate.
Fronds (simple?), trisect (rarely), or pinnatisect; stipe 10–25 cm long; lamina 15–35 cm long, shortly decurrent onto stipe at base; lobes 2–14, 3–20 cm long, 0.8–2 cm broad, blunt to acute, glabrous.
Sori manifestly sunken, globose, 1.5–3 mm diam., about 1/3 of the way in from margin to midrib.
Distribution and occurrence: Lord Howe Is. Endemic. Frequent on mossy rocks, decaying stumps, etc., in forested areas.
NSW subdivisions: LHI
Text by E.A. Brown Taxon concept: Flora of Australia 49
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