Dasygrammitis mollicoma (Nees & Blume) Parris

Family

Polypodiaceae

Nomenclature

Dasygrammitis mollicoma (Nees & Blume) Parris, Gard. Bull. Singapore 58: 239. 2007; Parris, Fl. Pen. Malaysia, Ser. I, Ferns & Lycoph. 1: 156. 2010. – Polypodium mollicomum Nees & Blume, Nova Acta 11: 121, t. 12. 1823. – Ctenopteris mollicoma (Nees & Blume) Kunze, Bot. Zeit. 1846: 425. 1946; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 533. 1941; Holttum, Rev. Fl. Malaya ed. 1, 2: 226, f. 124. 1955 [‘1954’]; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 49. 1968; Tagawa & K.Iwats., Fl. Thailand 3: 588. 1989; Boonkerd & Pollawatn, Pterid. Thailand: 290. 2000. – Type: Blume s.n., Java (L).

Description

Rhizome erect, sometimes standing up to 5 cm in height in thick moss on tree trunks, bearing fronds in a tuft at apex, scaly; scales lanceolate, acute to acuminate at apex, 3.5 by 0.4 mm, entire, hairy at margin with setose castaneous hairs, bright brown, rather thick. Stipes up to (0.8–)2 cm long, dark brown, densely covered with patent, setose, castaneous hairs about 2 mm in length. Laminae lanceolate, gradually narrowing towards both the apex and the base, up to (3.7–)20 by 2 cm, deeply pinnatisect nearly to rachis; pinnae 16–44 pairs, oblique, narrowly subtriangular, usually gradually narrowing towards round or moderately acute apex, entire, (0.4–)1.2 cm long, (0.2–)2.5 mm broad, the basiscopic base more or less decurrent to rachis; veins hardly visible, pinnate, veinlets simple, 6–10 in pairs; papyraceous, both surfaces rather densely hairy, hairs setose, castaneous, 1–2 mm long, those on upper surface shorter. Sori terminal on veinlets, round, sometimes touching adjacent ones, medial .

Distribution in Thailand

PENINSULAR: Nakhon Si Thammarat, Yala.

Wider Distribution

Sri Lanka, Thailand, Vietnam, Taiwan, throughout Malesia.

Ecology

On mossy tree trunks in dense evergreen forests on ridges at high altitudes, rather rare.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.  It has been listed as Endangered in the Flora of PeninsularMalaysia.

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