Dryopteris neochrysocoma Ching

Family

Dryopteridaceae

Nomenclature

Dryopteris neochrysocoma Ching, Lingnan Sci. J. 21: 31. 1945; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 95. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 348, f. 31.8 & 31.9. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 204. 2000.

Description

Rhizome short, ascending; scales dense, membranous, light brown, more than 1 cm long, up to 1.2 mm broad. Stipes few at apex of rhizome, stramineous, about 8 cm long, scaly throughout; scales not very dense, lanceolate, up to 8 by 0.8 mm, gradually becoming smaller upwards. Laminae bipinnatifid, oblong-lanceolate, gradually narrowing towards both ends, 20–25 by 8–12 cm at widest middle portion; pinnae about a dozen pairs, lower pinnae slightly reduced, more or less reflexed, middle ones sessile, slightly falcate, acuminate at apex, broadly cuneate to subtruncate at base, narrowly oblong, up to 4 by 1.2 cm, deeply lobed nearly to costa; lobes oblong, slightly oblique, round to obtuse at apex and slightly toothed at apical margin, about 5 by 4 mm; papyraceous, glabrous; veins pinnate, veinlets simple or forked. Sori in a single row very close to costa; indusia large, about 2 mm diam., perfectly covering and embracing the sori , breaking down irregularly at maturity.

Distribution in Thailand

NORTHERN: Chiang Mai, Uttaradit.

Wider Distribution

S China and E Himalaya.

Ecology

On mountain slopes in dense evergreen forests at high altitudes.

Proposed IUCN Conservation Assessment

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

Habit

Habit

Whole plant

Whole plant

Rhizome

Rhizome

Pinnae

Pinnae

Pinnae with young sori

Pinnae with young sori

Sori

Sori

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