Cyclosorus crinipes (Hook.) Ching

Family

Thelypteridaceae

Nomenclature

Cyclosorus crinipes (Hook.) Ching, Bull. Fan Mem. Inst. Biol. 8: 179. 1938. – Nephrodium crinipes Hook., Sp. Fil. 4: 71. 1862; Bedd., Handb. Ferns Brit. India: 279. 1883. – Thelypteris crinipes (Hook.) K.Iwats., J. Jap. Bot. 38: 315. 1963; Tagawa & K.Iwats., SouthE Asian Stud. 3(3): 80. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 68. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 430. 1988. – Christella crinipes (Hook.) Holttum in B.K.Nayar & S.Kaur, Companion Handb. Ferns Brit. India: 208. 1974; Holttum, Kew Bull. 31: 326. 1976; Boonkerd & Pollawatn, Pterid. Thailand: 220. 2000. Type: Hooker fil. & Thomson, Sikkim, 300 m (K).

Description

Rhizome short, erect or ascending; scales linear-lanceolate with long-tailed apex, up to 20 by 1.2 mm, brown, glabrous. Stipes 20–60 cm long, with reduced pinnae on upper part, densely scaly throughout. Laminae oblong-lanceolate with acute apex, up to 100 by 40 cm; rachis scaly throughout; several lower pinnae distinctly reduced and immersed among scales, lower normal pinnae straight, ascending, linear, gradually narrowing towards long-acuminate apex, up to 25 by 1.5 cm, lobed halfway to costa; segments oblong, oblique, acute at apex; chartaceous, green to deep green, pubescent on undersurface; costa pubescent; veins pinnate, basal pairs of veinlets uniting with those of the adjacent group to form connivent veinlets, the others running to the margin of segments, hairy. Sori medial or nearer to margin, round; indusia round-reniform, densely hairy .

Distribution in Thailand

NORTHERN: Mae Hong Son, Chiang Mai, Chiang Rai, Lamphun, Lampang, Tak, Phitsanulok; SOUTH-WESTERN: Uthai Thani.

Wider Distribution

Himalaya and SW China.

Ecology

On sandy ground along streams in deciduous or evergreen forests at low to medium altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 5107, Phitsanulok, Phu Soi Dao (E).

Growing tip of rhizome

Growing tip of rhizome

Pinnae from above

Pinnae from above

Pinnae from beneath

Pinnae from beneath

Reduced pinnae at base of lamina

Reduced pinnae at base of lamina

Scales on stipe

Scales on stipe

Upper surface of rachis and pinnae

Upper surface of rachis and pinnae

Reduced lower pinna

Reduced lower pinna

Lower surface of rachis and pinnae

Lower surface of rachis and pinnae

Sori

Sori

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