Osmolindsaea odorata (Roxb.) Lehtonen & Christenh.

Family

Lindsaeaceae

Nomenclature

Osmolindsaea odorata (Roxb.) Lehtonen & Christenh., Bot. J. Linn. Soc. 163: 335. 2010. – Lindsaea odorata Roxb., Calcutta J. Nat. Hist. 4: 511. 1844; Kramer, Fl. Males., Ser. II, Pterid. 1: 228. 1971; Kramer, Gard. Bull. Singapore 26: 40. 1972; Tagawa & K.Iwats., Fl. Thailand 3: 141, f. 10.3. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 43, 94. 2000.

Lindsaea cultrata auct. non (Willd.) Sw.: Bedd., Handb. Ferns Brit. India: 72, f. 36. 1883; Christ, Bot. Tidsskr. 24: 110. 1901; C.Chr., Bot. Tidsskr. 32: 345. 1916; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 120. 1939; Holttum, Rev. Fl. Malaya ed. 1, 2: 328, f. 188. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 24. 1961; Ching, Fl. Reipubl. Popularis Sin. 2: 260, pl. 22, f. 1–7. 1959; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 74. 1967.

Description

Rhizome short creeping, 1.0–1.2 mm diam., bearing stipes 2–5 mm apart, dark brown; scales dense, hair-like, up to 3 mm long, dark brown to castaneous. Stipes up to 8 cm long, dark brown, terete. Laminae simply pinnate, stramineous or faintly castaneous upwards, linear or linear-lanceolate, up to 13 by 1.7 cm, gradually narrowing towards both apex and base; pinnae up to 20 pairs, more or less ascending, stalked, except on the upper ones; middle ones the largest, about 8 mm apart, oblong, round at apex, cuneate at base, up to 8 by 4 mm, lower edge roundly curved and entire, inner edge straight or curved, upper edge lobed to 1/3, upper ones gradually upwards, shortly stalked or sessile, more ascending; lobes rounded, 1–2 mm broad, up to 2 mm in depth, thin; veins raised on both surfaces, free except when united by sori. Sori up to 1.5 mm long, interrupted by sinus between lobes; indusia firm, reaching the margin or lobes, the margin more or less irregular.

Distribution in Thailand

NORTH-EASTERN: Loei; PENINSULAR: Trang.

Wider Distribution

Tropics of the Old World, Madagascar and Sri Lanka to Australia, north to S Japan.

Ecology

On sandy rocks in stream-beds in dense evergreen forests to 1200 m alt. on Phu Kradueng.

Proposed IUCN Conservation Assessment

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

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