Davallodes hymenophylloides (Blume) M.Kato & Tsutsumi

Family

Davalliaceae

Nomenclature

Davallodes hymenophylloides (Blume) M.Kato & Tsutsumi, Acta Phytotax. Geobot. 59: 12. 2008. – Aspidium hymenophylloides Blume, Enum. Pl. Javae: 172. 1828. – Leucostegia hymenophylloides (Blume) Bedd., Ferns S. India: t. 252. 1863. – Davallia hymenophylloides (Blume) Kuhn in Miq., Ann. Mus. Bot. Lugd.-Bat. 4: 286. 1869; Nooteboom, Fl. Males., Ser. II, Ferns and Fern Allies 3: 255, f. 1. 1998; Newman et al., Checkl. Vasc. Pl. Lao PDR: 26. 2007. – Humata hymenophylloides (Blume) Copel., Publ. Bur. Sci. Govt. Lab. Philipp. 28: 51. 1905. – Araiostegia hymenophylloides (Blume) Copel., Philipp. J. Sci. 34: 241. 1927. – Type: Blume s.n. (L sheet 909.30-144), Java, Mt. Burangran.

Description

Description adapted from Nooteboom, Fl. Males., Ser. II, Ferns and Fern Allies 3: 255. 1998.

Rhizome 3–20 mm diam. (not including scales), not waxy white. Scales brown, without pale border, evenly narrowing to apex, often curling backwards, no multiseptate hairs, usually no marginal setae or teeth, basifixed with cordate base and greatly overlapping, 4–7 mm long. Stipes dark brown, adaxially grooved, 9–45(–65) cm long, glabrous or with few scales. Laminae tripinnate, elongate, often narrowing towards base, glabrous, 20–80(–90) x 6–50 cm. Pinnae linear-triangular; longest pinnae 4–30(–44) x 1.5–15(–18) cm; pinnules of at least the larger pinnae anadromous, narrowly ovate; longest pinnules 10–80 x 5–20 mm; ultimate segments or lobes obtuse or acute, without a tooth; lamina axes glabrous (or nearly so). Veins in sterile ultimate segments frequently simple, not reaching the margin. Sori separate, often single on a segment at the bending point of a vein. Indusium scaly, attached at the narrow cordate base only, reniform , 0.1–0.4 x 0.4–0.7 mm.

Distribution in Thailand

SOUTH-EASTERN: Prachin Buri.

Distribution in Laos

Bolikhamsai.

Wider Distribution

Sri Lanka, India, W Malesia.

Ecology

Epiphytic or lithophytic at medium to high altitudes.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.

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