Ferns of Thailand, Laos and Cambodia

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Family

Thelypteridaceae

Nomenclature

Cyclosorus procerus (D.Don) S.Linds. & D.J.Middleton, Nordic J. Bot. 30: 308. 2012. – Nephrodium procerum D.Don, Prodr. Fl. Nepal.: 6. 1825. – Thelypteris procera (D.Don) Fraser-Jenk., Taxon. Revis. Indian Subcontinental Pteridophytes : 183. 2008. – Type: Wallich s.n., Nepal, 1891 (BM, lectotype designated by Fraser-Jenkins, 2008).

Aspidium molliusculum Kuhn, Bot. Zeit. 26: 41. 1868. – Nephrodium molliusculum (Kuhn) Bedd., Suppl. Ferns Brit. Ind.: 68. 1892. – Cyclosorus molliusculus (Kuhn) Ching, Bull. Fan Mem. Inst. Biol. 8: 197. 1938. – Thelypteris molliuscula (Kuhn) K.Iwats. in Hara, Fl. E. Himal.: 484. 1966; Tagawa & K.Iwats., Acta Phytotax. Geobot. 25: 16. 1971; Tagawa & K.Iwats., Fl. Thailand 3: 424, f. 44.4–6. 1988.

Christella appendiculata Holttum, Kew Bull. 31: 311. 1976; Boonkerd & Pollawatn, Pterid. Thailand: 219. 2000.

Description

Rhizome long creeping, 3–5 mm diam.; scales concolorous brown, to 8 mm long, 1 mm wide. Stipe 20–40 cm long, sparsely long hairy, stramineous (or flushed red). Lamina bipinnatifid, narrowly ovate, 30–72 by 19–24 cm, with 24–30 pairs of pinnae; pinnae sessile, oblong, basal pair usually with a larger crenate acroscopic pinnule, apex acuminate to caudate, lobed to 1–2 mm from costa, 9–15 by 1.5–2.5 cm, base of pinna auricled at least at acroscopic side; 1 pair of basal veins anastomosing and with an excurrent vein to the sinus callous; underside of veins and laminar surface densely hairy with long, patent, pale hairs and yellow sessile glands; sori medial, sporangia with yellow sessile glands, indusia small, densely long-hairy .

Distribution in Thailand

NORTH-EASTERN: Phetchabun; SOUTH-EASTERN: Prachin Buri.

Wider Distribution

Himalaya to N Burma.

Ecology

On mountain slopes in evergreen forests at 1200–1300 m alt.

Proposed IUCN Conservation Assessment

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

	Ferns of Thailand, Laos and Cambodia
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Cyclosorus procerus (D.Don) S.Linds. & D.J.Middleton 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 Thelypteridaceae Nomenclature Cyclosorus procerus (D.Don) S.Linds. & D.J.Middleton, Nordic J. Bot. 30: 308. 2012. – Nephrodium procerum D.Don, Prodr. Fl. Nepal.: 6. 1825. – Thelypteris procera (D.Don) Fraser-Jenk., Taxon. Revis. Indian Subcontinental Pteridophytes : 183. 2008. – Type: Wallich s.n., Nepal, 1891 (BM, lectotype designated by Fraser-Jenkins, 2008). Aspidium molliusculum Kuhn, Bot. Zeit. 26: 41. 1868. – Nephrodium molliusculum (Kuhn) Bedd., Suppl. Ferns Brit. Ind.: 68. 1892. – Cyclosorus molliusculus (Kuhn) Ching, Bull. Fan Mem. Inst. Biol. 8: 197. 1938. – Thelypteris molliuscula (Kuhn) K.Iwats. in Hara, Fl. E. Himal.: 484. 1966; Tagawa & K.Iwats., Acta Phytotax. Geobot. 25: 16. 1971; Tagawa & K.Iwats., Fl. Thailand 3: 424, f. 44.4–6. 1988. Christella appendiculata Holttum, Kew Bull. 31: 311. 1976; Boonkerd & Pollawatn, Pterid. Thailand: 219. 2000. Description Rhizome long creeping, 3–5 mm diam.; scales concolorous brown, to 8 mm long, 1 mm wide. Stipe 20–40 cm long, sparsely long hairy, stramineous (or flushed red). Lamina bipinnatifid, narrowly ovate, 30–72 by 19–24 cm, with 24–30 pairs of pinnae; pinnae sessile, oblong, basal pair usually with a larger crenate acroscopic pinnule, apex acuminate to caudate, lobed to 1–2 mm from costa, 9–15 by 1.5–2.5 cm, base of pinna auricled at least at acroscopic side; 1 pair of basal veins anastomosing and with an excurrent vein to the sinus callous; underside of veins and laminar surface densely hairy with long, patent, pale hairs and yellow sessile glands; sori medial, sporangia with yellow sessile glands, indusia small, densely long-hairy . Distribution in Thailand NORTH-EASTERN: Phetchabun; SOUTH-EASTERN: Prachin Buri. Wider Distribution Himalaya to N Burma. Ecology On mountain slopes in evergreen forests at 1200–1300 m alt. Proposed IUCN Conservation Assessment Least Concern (LC). This species is widespread and not under any known threat. 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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