Pteridium semihastatum (Wall. ex J.Agardh) S.B.Andrews

Family

Dennstaedtiaceae

Nomenclature

Pteridium semihastatum (Wall. ex J.Agardh) S.B.Andrews, Austrobaileya 1: 12. 1977. – Pteris semihastata Wall. ex J.Agardh, Recens. Spec. Pter. 48. 1839.

Pteridium aquilinum (L.) Kuhn subsp. caudatum (L.) R.M.Tryon var. yarrabense Domin, Biblioth. Bot. 85(1): 161, f. 32. 1914; R.M.Tryon, Rhodora 43: 63, pl. 650, f. 16 & pl. 653, f. 2. map 10. 1941; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 79. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 126, f. 9.5 & 9.7. 1979; Boonkerd & Pollawatn, Pterid. Thailand: 41, 90. 2000.

Pteris esculenta G.Forst., Diss. Pl. Esc.: 74. 1786. – Pteridium esculentum (G.Forst.) Nakai, Bot. Mag. Tokyo 39: 108. 1825; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 138, f. 17.1. 1939; Holttum, Rev. Fl. Malaya ed. 1, 2: 390, f. 226. 1955 [‘1954’]; Seidenf, Nat. Hist. Bull. Siam Soc. 19: 86. 1958; Dy Phon, Dictionary of Plants used in Cambodia: 515. 2000. – Pteris aquilina var. esculenta (G.Forst.) Bedd., Handb. Ferns Brit. India: 116. 1883.

Description

Rhizome long creeping, covered with fine pale brown hairs. Stipes c. 30 cm long; thick, dark brown at base, stramineous upwards; lamina tripinnate at base, to 50 by 35 cm; rachis, costae and costules grooved on upper surface, the grooves decurrent to those in the next higher order; pinnae and pinnules ending with linear apex much longer than other lobes, all other ultimate lobes narrowly oblong or narrowly triangular, subcoriaceous, glabrous above, densely pubescent benenath, veins free, forked. Sori linear, submarginal, the apices of veins joined by vascular commissure, thus forming long continuous receptacles; indusia a thin membrane attached just below the receptacles.

Distribution in Thailand

NORTHERN: Chiang Mai; NORTH-EASTERN: Loei; CENTRAL: Nakhon Nayok; SOUTH-EASTERN: Trat: PENINSULAR: Chumphon, Surat Thani.

Distribution in Laos

Savannakhet

Distribution in Cambodia

Kampot, Siem Reap.

Wider Distribution

Himalaya through Malesia to Australia.

Ecology

Himalaya through Malesia to Australia.

Proposed IUCN Conservation Assessment

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

Notes

Young fronds can be eaten as a vegetable (Dy Phon, 2000).

Voucher specimens - Laos

Maxwell 07-233, Savannakhet, Nakai (CMU).

Voucher specimens - Cambodia

Long et al. CL252, Siem Reap (P).

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