Tectaria rockii C.Chr.

Family

Tectariaceae

Nomenclature

Tectaria rockii C.Chr., Contr. U.S. Natl. Herb. 26: 331. 1931; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 420. 1941; Holttum, Dansk Bot. Ark. 23: 238. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 98. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 374. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 216. 2000.

Tectaria burmanica Ching, Sinensia 2: 31, pl. 12. 1931.

Description

Rhizome short, creeping or ascending, densely scaly; scales stiff, dark brown to nearly black, entire, linear-subtriangular, up to 17 by 1.5 mm. Stipes up to 80 cm long, castaneous to brown, scaly near base, minutely puberulous throughout. Laminae broadly deltoid, about 50 cm long and wide, bipinnate to tripinnate at base; rachis densely puberulous; lateral pinnae 3–5 pairs, basal pinnae much the largest, up to 52 by 30 cm, asymmetrically subdeltoid, deeply lobed or pinnate near base; terminal pinna subtriangular, acuminate at apex, cuneate at base, lobed; pinna-rachis and costa densely puberulous on upper surface, hairy beneath; basiscopic pinnule of basal pinna larger, shortly stalked or sessile, crenate to lobed, up to 23 by 6 cm; lobes of other pinnae rounded to acute at apex, entire; herbaceous or thicker, deep green, paler beneath; veins sparsely hairy, raised beneath, forming irregular areoles with numerous included free veinlets. Sori dispersed on lower surface or sometimes confined to lobes, on reticulate veins, round, about 1.5 mm diam.; indusia more or less persistent, minutely hairy or glabrescent .

Distribution in Thailand

NORTHERN: Chiang Mai, Chiang Rai, Tak; NORTH-EASTERN: Loei; SOUTH-WESTERN: Kanchanaburi; SOUTH-EASTERN: Chanthaburi.

Distribution in Laos

Hua Phan, Khammouane, Xieng Khouang.

Wider Distribution

Burma and Indochina.

Ecology

On mountain slopes in dense forests at 400–1200 m alt.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4700, Chanthaburi, Khao Soi Dao Wildlife Sanctuary (E).

Habit

Habit

Rhizome

Rhizome

Rhizome

Rhizome

Upper surface of rachis and lamina

Upper surface of rachis and lamina

Venation

Venation

Venation

Venation

Lower surface of lamina

Lower surface of lamina

Lower surface of lamina and sori

Lower surface of lamina and sori

Sori

Sori

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