Ferns of Thailand, Laos and Cambodia

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Family

Polypodiaceae

Nomenclature

Drynaria sparsisora (Desv.) T.Moore, Index Filic.: 348. 1862; C.Chr., Bot. Tidsskr. 32: 349. 1916; Holttum, Rev. Fl. Malaya ed. 1, 2: 183, f. 89. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 23: 231. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 78. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 58. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 544. 1989; Hovenkamp & Roos, Fl. Males., Ser. II, Ferns and Fern Allies 3: 43. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 25, 2701. 2000; Leti et al., Fl. Photogr. Cambodge 556. 2013. – Polypodium sparsisorum Desv., Berl. Mag. 5: 315. 1811.

Polypodium linnei Bory, Ann. Sci. Nat. 5: 464, t. 12. 1825. – Drynaria linnei (Bory) Bedd., Ferns Brit. India: t. 315. 1869; Handb. Ferns Brit. India: 343. 1883; Christ, Bot. Tidsskr. 24: 106. 1901.

Description

Rhizome short creeping, 1–3 cm diam., densely covered with scales; scales oblong-ovate, acute at apex, round at base, peltate, toothed to fimbriate at margin, 1.5–3(–11) by 1–2.5 mm, bi-coloured with black brown central portion and brown margin, not so stiff. Nest leaves sessile, oval to ovate-oblong, 17–23 by 16–22 cm, lobed to a half-way between midrib and margin; lobes round at apex, entire, oblong-subdeltoid, up to 6 by 4 cm. Foliage leaves: stipes 12–18(–35) cm long, narrowly winged almost to the base; laminae pinnatifid, oblong, acute at apex, 40–50(–150) by (15–)25–35(–50) cm; lobes oblique, adnate to its neighbours with laminae of less than 1 cm in breadth, oblong-lanceolate, caudately acuminate at apex, entire, up to 20 by 5 cm; veins raised on both surfaces, copiously anastomosing, 6–8 rows of areoles between the main veins, no included free veinlets; coriaceous; pale green, glabrous. Sori round or punctiform, on veins, irregularly placed on the lower surface of lobes.

Distribution in Thailand

EASTERN: Chaiyaphum; SOUTH-WESTERN: Phetchaburi; SOUTH-EASTERN: Prachin Buri, Chanthaburi, Trat; PENINSULAR: Ranong, Phangnga, Phuket, Krabi, Trang, Satun, Narathiwat.

Distribution in Cambodia

Koh Kong.

Wider Distribution

Malesia and Polynesia to tropical Australia.

Ecology

On tree trunks in dense evergreen forests or in light shade at low to medium altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Cambodia

Viboth R5-43, Koh Kong, Thma Baing (P).

	Ferns of Thailand, Laos and Cambodia
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Drynaria sparsisora (Desv.) T.Moore Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17 Family Polypodiaceae Nomenclature Drynaria sparsisora (Desv.) T.Moore, Index Filic.: 348. 1862; C.Chr., Bot. Tidsskr. 32: 349. 1916; Holttum, Rev. Fl. Malaya ed. 1, 2: 183, f. 89. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 23: 231. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 3(3): 78. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 58. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 544. 1989; Hovenkamp & Roos, Fl. Males., Ser. II, Ferns and Fern Allies 3: 43. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 25, 2701. 2000; Leti et al., Fl. Photogr. Cambodge 556. 2013. – Polypodium sparsisorum Desv., Berl. Mag. 5: 315. 1811. Polypodium linnei Bory, Ann. Sci. Nat. 5: 464, t. 12. 1825. – Drynaria linnei (Bory) Bedd., Ferns Brit. India: t. 315. 1869; Handb. Ferns Brit. India: 343. 1883; Christ, Bot. Tidsskr. 24: 106. 1901. Description Rhizome short creeping, 1–3 cm diam., densely covered with scales; scales oblong-ovate, acute at apex, round at base, peltate, toothed to fimbriate at margin, 1.5–3(–11) by 1–2.5 mm, bi-coloured with black brown central portion and brown margin, not so stiff. Nest leaves sessile, oval to ovate-oblong, 17–23 by 16–22 cm, lobed to a half-way between midrib and margin; lobes round at apex, entire, oblong-subdeltoid, up to 6 by 4 cm. Foliage leaves: stipes 12–18(–35) cm long, narrowly winged almost to the base; laminae pinnatifid, oblong, acute at apex, 40–50(–150) by (15–)25–35(–50) cm; lobes oblique, adnate to its neighbours with laminae of less than 1 cm in breadth, oblong-lanceolate, caudately acuminate at apex, entire, up to 20 by 5 cm; veins raised on both surfaces, copiously anastomosing, 6–8 rows of areoles between the main veins, no included free veinlets; coriaceous; pale green, glabrous. Sori round or punctiform, on veins, irregularly placed on the lower surface of lobes. Distribution in Thailand EASTERN: Chaiyaphum; SOUTH-WESTERN: Phetchaburi; SOUTH-EASTERN: Prachin Buri, Chanthaburi, Trat; PENINSULAR: Ranong, Phangnga, Phuket, Krabi, Trang, Satun, Narathiwat. Distribution in Cambodia Koh Kong. Wider Distribution Malesia and Polynesia to tropical Australia. Ecology On tree trunks in dense evergreen forests or in light shade at low to medium altitudes. Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any known threat. Voucher specimens - Cambodia Viboth R5-43, Koh Kong, Thma Baing (P). Warning: count(): Parameter must be an array or an object that implements Countable in C:\Data\serverroots\htdocs\ThaiFerns\factsheets\functions.php on line 17
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Drynaria sparsisora (Desv.) T.Moore