Plagiogyria adnata (Blume) Bedd.




Plagiogyria adnata (Blume) Bedd., Ferns Brit. India: t. 51. 1865; Handb. Ferns Brit. India: 127, f. 65. 1883; Copel., Philipp. J. Sci. 38: 396. 1929; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 74. 1939; Holttum, Rev. Fl. Malaya ed. 1, 2: 111. 1955 [‘1954’]; Ching, Acta Phytotax. Sin. 7: 120, 145. 1958; Fl. Reipubl. Popularis Sin. 2: 96. 1959; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 44. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 47. 1979; Zhang & Nooteboom, Blumea 43: 418. 1998; Zhang & Nooteboom, Fl. Males., Ser. II, Ferns and Fern Allies 3: 300. 1998; Boonkerd & Pollawatn, Pterid. Thailand: 37, 85. 2000. – Lomaria adnata Blume, Enum. Pl. Javae.: 205. 1828. – Type: Blume s.n. (L sheet 908.315-140), Java.

See Zhang & Nooteboom, Blumea 43: 418. 1998 for many more synonyms.


Rhizome short, erect or ascending, naked, bearing a tuft of fronds. Fronds simply pinnate, dimorphic. Sterile fronds: stipes 18–25 cm long, stramineous or darker, flat on abaxial surface of upper part, wide and flat at base and excreting mucilage when young; laminae oblong-lanceolate, 20–30 cm long, 10–15 cm wide; rachis like the upper part of stipes, winged except for basal part; lateral pinnae 20–25 in pairs, ascending in upper ones, patent at middle and deflexed at basal ones, lanceolate, caudately acuminate at apex, sub- truncate or decurrent to wings of rachis at base, minutely serrate at margin, the serration distinct at apical region, up to 8 cm long, 1.3 cm wide; texture herbaceous, green, veins free, forked, reaching to the margin, distinct on both surfaces. Fertile fronds taller; stipes about 35cm long, quadrangular in section; pinnae about 15 in pairs, 1–1.5 cm apart, shortly stalked, linear, to 5 cm long, 3 mm broad; sporangia along veins, covering the whole under surface of fertile pinnae except for the midribs and thin edges, protected when young by the reflexed edges; annulus oblique, complete; spores tetrahedral .

Distribution in Thailand


Wider Distribution

Burma, S China, Vietnam, Malaya, Sumatra to the Philippines, Java, extending north to southern edge of Japan through Taiwan and the Ryukyus.


On sandy slopes in dense evergreen forest at 1100–1500 m alt.

Proposed IUCN Conservation Assessment

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

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