Cyclosorus procerus (D.Don) S.Linds. & D.J.Middleton

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.

Site hosted by the Royal Botanic Garden Edinburgh. Content managed by Stuart Lindsay, Gardens by the Bay, Singapore and David Middleton, Singapore Botanic Gardens. Last updated 16 November 2016.