Family

Dennstaedtiaceae

Nomenclature

Histiopteris incisa (Thunb.) J.Sm., Hist. Fil.: 295. 1875; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 139, f. 17.2 & 17.3. 1939; Holttum, Rev. Fl. Malaya ed. 1, 2: 391, f. 227. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 23: 237. 1965; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 79. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 127, f. 9.8–9.10. 1979; Boonkerd & Pollawatn, Pterid. Thailand: 38, 86. 2000. – Pteris incisa Thunb., Prod. Fl. Cap.: 171. 1800. – Lithobrochia incisa (Thunb.) C.Presl, Tent. Pterid.: 149. 1836; Bedd., Handb. Ferns Brit. India: 120, f. 62. 1883.

Description

Rhizome long creeping, covered with dark hairs. Stipes long, up to 1 m or more in length, dark purplish, shining; laminae bipinnate to quadripinnatifid, up to 2 m or more in length, climbing with well spaced opposite pinnae and pinnules; rachis, costae and costules grooved on upper surface, a pair of reduced stipule-like pinnules usually present at base of each pinnae; pinnae up to 70 cm long, 30 cm wide; pinnules up to 20 cm long, 7 cm wide; veins copiously anastomosing, rather distinct below. Sori continuous at edge of lobes, linear, submarginal, covered by the reflexed edge of lobes.

Distribution in Thailand

NORTH-EASTERN: Phetchabun, Loei; CENTRAL: Nakhon Nayok; PENINSULAR: Ranong, Krabi, Nakhon Si Thammarat.

Distribution in Cambodia

Kampot

Wider Distribution

Pantropical.

Ecology

On rather dry exposed slopes usually at edges of lower montane forest at medium altitudes.

Proposed IUCN Conservation Assessment

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

Voucher specimens - Thailand

Middleton et al. 4404, Nakhon Si Thammarat, Namtok Yong National Park (E).