e-Flora of Thailand

Volume 3 > Part 4 > Year 1989 > Page 542–543 > Polypodiaceae > Leptochilus

2. Leptochilus decurrens Blumewfo-0001115283

Enum. Pl. Javae: 206. 1828; Ching, Bull. Fan Mem. Inst. Biol. 4: 345. 1933; Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 502. 1941; Holttum, Rev. Fl. Malaya 2: 164. f. 74. 1955; Tagawa, J. Jap. Bot. 38: 328. 1963; Tagawa & K.Iwats., S.E. Asia Stud. 5: 55. 1967. Fig. 54. 7.


Accepted Name : This is currently accepted.



Synonyms & Citations :

Acrostichum variabile Hook., Sp. Fil. 5: 277. 1864; Hosseus, Beih. Bot. Centralbl. 28(2): 363. 1911.— Gymnopteris variabilis (Hook.) Bedd., Ferns Br. Ind.: t. 272. 1868; Handb. Ferns Brit. India: 429. f. 258. 1883.


Description : Rhizome long-creeping, up to 3 mm diam., bearing fronds more than 1 cm apart, scaly throughout; scales narrowly-substringualr, gradually narrowing from base towards long-attenuate apex, up to 3 by 1 mm, distinctly clathrate, concolorously brown. Fronds dimorphic. Sterile fronds: stipes up to 15 cm long, more or less winged at least on the upper part, sparsely scaly at lower portion, stramineous; laminae oblong to oblong-lanceolate, broadest near base, round or broadly cuneate at base and decurrent downwards to form wings of stipes, gradually narrowing upwards and then caudately acuminate at apex, up to 30 by about 10 cm, entire or irregularly undulate at amrgin; midrib raised on both surfaces; main lateral veins distinct, the other veins visible, forming copious areoles with forked or branched included free veinlets ; dark green, dark in dried condition. Fertile fronds: stipes up to 40 cm long, stramineous, wingless; laminae linear, up to 30 by 0.3 cm broad, wholly covered by sporangia except on the midrib.


Thailand : NORTHERN: Chiang Rai (Doi Phacho), Chiang Mai (Doi Chiang Dao, Tintok, Doi Suthep, Doi Inthanon), Lamphun (Doi Khun Tan), Mae Hong Son (Doi Loi Bian, Ban Pasui), Phrae (Huai Hom Noi), Lampang (Mae Tha); NORTH-EASTERN: Phetchabun (Phu Miang); SOUTH-WESTERN: Chantaburi (Khao Ram, Khao soi Dao Tai); SOUTH-WESTERN: Uthai Thani (Noen Pradu), Kanchanaburi (Kha Thalai); PENINSULAR: Nakhon S Thammarat (Khao Luang).


Distribution : S India, Himalayas to S China and Taiwan, Indochina, Malesia (type from Java) and Polynesia throughout.


Ecology : Terestrial, on moist rocks or on basal tree-trunks usually in dense evergreen forests, rather common at medium to high altitudes throughout Thailand.


E-version notes : For more details see Ferns of Thailand, Laos and Cambodia.


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