Family

Schizaeaceae

Nomenclature

Actinostachys digitata (L.) Wall. ex C.F.Reed, Bol. Soc. Brot. 21: 130 (1947); Jaman & Umi Kalsom, Fl. Pen. Malaysia, Ser. I, Ferns & Lycoph. 1: 108 (2010). – Acrostichum digitatum L., Sp. Pl.: 1068 (1753). – Schizaea digitata (L.) Sw., Syn. Fil.: 150, 380, t. 4, f. 1 (1896); Bedd., Handb. Ferns Brit. India: 452, f. 279 (1883); Christ, Bot. Tidsskr. 24: 112 (1901); C.Chr., Bot. Tidsskr. 32: 349 (1916); Bonap., Notes Ptérid. 13: 101 (1921); Tardieu & C.Chr., Fl. Indo-Chine 7(2): 42, f. 6.4 & 6.5 (1939); Holttum, Rev. Fl. Malaya ed. 1, 2: 51, f. 7 (1955) [‘1954’]; Holttum, Fl. Males., Ser. II, Pterid. 1: 41, f. 3a–e (1959); Holttum, Dansk Bot. Ark. 20: 15 (1961); Holttum, Dansk Bot. Ark. 23: 228 (1965); Seidenf., Nat. Hist. Bull. Siam Soc. 19: 85 (1958); Ching, Fl. Reipubl. Popularis Sin. 2: 114, pl. 7, f. 1–6 (1959); Tagawa & K.Iwats., Fl. Thailand 3: 58 (1979); Boonkerd & Pollawatn, Pterid. Thailand: 36, 84 (2000). – Type: Herb. Hermann s.n., Sri Lanka ("Ceylon") (BM).

Description

Terrestrial. Rhizome short, creeping or ascending, deep in the earth. Fronds 4–10 on one stock, erect, unbranched, grass-like when sterile, 15–35(–45) cm long, winged except for the base, the widest portion about 5 mm; costae prominent on lower and slightly grooved on upper surfaces, glandular hairs abundant below. Sporangia-bearing lobes 7–20 at apex of fronds, equal, 2–5cm long, about 1.2 mm broad.

Distribution in Thailand

SOUTH-EASTERN: Rayong, Chanthaburi, Trat; PENINSULAR: Ranong, Surat Thani, Phangnga, Krabi, Satun, Songkhla, Yala, Narathiwat.

Distribution in Cambodia

Kampot, Kompong Thom, Siem Reap, Stung Treng.

Wider Distribution

Tropical Asia, north to S China (Guangdong, Hainan & Taiwan) and Micronesia.

Ecology

Terrestrial in light shade at low altitudes.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is common and widespread.

Voucher specimens - Thailand

Middleton et al. 4600, Trat, Ko Chang, Thanmagon Waterfall (E).

Voucher specimens - Cambodia

Bouillod s.n., Kampot, Kamchay (P); Pierre s.n., Kompong Thom, Sral (P); Harmand s.n., Siem Reap, Angkor (P); Poilane 14072, Stung Treng, Anlong Veng (P).