Actinostachys digitata (L.) Wall. ex C.F.Reed

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).

Habit

Habit

Habit

Habit

Young fertile part of frond

Young fertile part of frond

Older fertile part of frond

Older fertile part of frond

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