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Nephrolepis biserrata (Sw.) SchottFamilyLomariopsidaceae NomenclatureNephrolepis biserrata (Sw.) Schott, Gen. Fil. ad t. 3. 1834; E.Smith, J. Siam Soc., Nat. Hist. Suppl. 8: 6. 1929; C.Chr., Contr. U.S. Natl. Herb. 26: 331. 1931; Holttum, Rev. Fl. Malaya ed. 1, 2: 380, f. 217. 1955 [‘1954’]; Holttum, Dansk Bot. Ark. 20: 26. 1961; Seidenf., Nat. Hist. Bull. Siam Soc. 19: 86. 1958; Ching, Fl. Reipubl. Popularis Sin. 2: 316, pl. 28, f. 5 & 6. 1959; Tagawa & K.Iwats., Fl. Thailand 3: 175. 1985; Boonkerd & Pollawatn, Pterid. Thailand: 237. 2000; Hovenkamp & Miyamoto, Blumea 50: 290. 2005; Leti et al., Fl. Photogr. Cambodge 554. 2013. – Aspidium biserratum Sw., Schrad. J. Bot. 1800(2): 32. 1801. Aspidium acutum Schkuhr, Krypt. Gew. 1: 32, t. 31. 1806. – Nephrolepis acuta (Schkuhr) C.Presl, Tent. Pterid.: 79. 1836; Bedd., Handb. Ferns Brit. India: 284. 1883; Hosseus, Beih. Bot. Centralbl. 28(2): 365. 1911; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 291. 1941. DescriptionRhizome ascending or suberect, bearing a few fronds drooping at apex, numerous wiry roots, and stolons; scales gradually narrowing from base towards tailed apex, up to 5 mm or more long, 0.8 mm broad, brown, with hairy or irregular margin, thin and usually ferrugineous. Stipes up to 40(–100) cm long, stramineous, densely scaly with narrower scales. Laminae large, usually more than 150(–385) by 30(–40) cm, lanceolate, narrowing towards both apex and base, pinnate; lateral pinnae up to 70 or more pairs; middle ones about 3 cm apart, larger, patent or slightly falcate at posterior end, linear-lanceolate, acuminate to caudate at apex, cuneate at base, sessile, serrate at margin of posterior part, up to 15(–24) by 1.5(–2) cm, thin but stiff; veins forked near costa, posterior branches sometimes forked again at middle part, minutely scaly on costa and even on laminar surface. Sori round, in one row at 1/3–1/2 way from margin to costa; indusia reniform, round, glabrous , about 1.5 mm diam. Distribution in ThailandNORTHERN: Chiang Mai, Chiang Rai; EASTERN: Ubon Ratchathani; CENTRAL: Bangkok; SOUTH-EASTERN: Chon Buri, Trat; PENINSULAR: Surat Thani, Phangnga, Nakhon Si Thammarat, Trang, Satun, Songkhla, Yala, Narathiwat. Distribution in CambodiaKoh Kong. Wider DistributionPantropical. EcologyEpiphytic or terrestrial in lowlands and mountainous areas. Proposed IUCN Conservation AssessmentLeast Concern (LC). This species is widespread and not under any known threat. Voucher specimens - ThailandMiddleton et al. 5189, Ubon Ratchathani, Phu Chong Nayoi National Park (E). Voucher specimens - CambodiaLong et al. CL497 & CL538, Koh Kong (P). Scrambling frond Rhizome Crozier Crozier Pinnae Upper surface of rachis and pinnae Lower surface of rachis and pinnae Upper surface of pinna Upper surface of fertile pinna Hydathodes at upper margin of pinna Lower surface of pinna and sori Sori |
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