Hymenophyllaceae
Australian Tropical Ferns and Lycophytes - Online edition
Hymenophyllum gracilescens
Hymenophyllum gracilescens Domin
Link to Australian Plant Name Index for publication details and synonyms: https://id.biodiversity.org.au/name/apni/80028
Rhizome slender, glabrescent. Fronds 2.5–9 cm long. Stipe 0.5–2.5 cm long, obscurely winged, ±glabrous. Lamina oblong-elliptic, 1–2-pinnate-pinnatifid, 2–7.5 cm long, 0.8–3 cm wide; main rachis obscurely winged; pinnae widely spaced. Ultimate segments oblanceolate to elliptic, to 1.4 mm wide; margins finely toothed. Sori borne on reduced lower branches on the acroscopic side of the pinnae, mainly in the upper part of the frond; involucre ovate to narrowly ovate, bilabiate, divided to the base, 1.2–1.7 mm long, 0.6–1.3 mm wide, broader than the segment on which it is borne; margins finely toothed apically; receptacle included.
Endemic to high mountains in the Wet Tropics of NE QLD.
Litophytic in rocks in and near streams in mesic upper montane vine forest.
Field AR, Quinn CJ, Zich FA (2022) Australian Tropical Ferns and Lycophytes. apps.lucidcentral.org/fern/text/intro/index.htm (accessed online INSERT DATE).
Field AR, Quinn CJ, Zich FA (2022) ‘Platycerium superbum’, in Australian Tropical Ferns and Lycophytes. apps.lucidcentral.org/fern/text/entities/platycerium_superbum.htm (accessed online INSERT DATE).