Volume 3 > Part 2 > Year 1989 > Page 180–181 > Oleandraceae > Oleandra

2. Oleandra undulata (Willd.) Chingwfo-0001124869

Lingn. Sci. J. 12: 565. 1933; Lingn. Sci. J. 12: 565. 1933; Tardieu & C.Chr. In Fl. Indo-Chine 7(2): 286. f. 30, 1–2. 1940; Holttum, Rev. Fl. Malaya 2: 384. f. 223. 1955; Dansk Bot. Ark. 20: 26. 1961; 23: 235. 1965; Ching, Fl. Reipubl. Popularis Sin. 2: 322. pl. 29. f. 1–4. 1959; Tagawa & K.Iwats., S.E. Asian Stud. 5: 78. 1967.— Polypodium undulatum Willd., Sp. Pl. 5: 155. 1810.

Accepted Name : This is currently accepted.

Synonyms & Citations :

Description : Rhizome long-creeping, 3–5 mm diam., bearing distant fronds, or rather closely on some portions, densely scaly throughout; scales appressed, oblong, round to moderately acute at basal edge, acuminate at apical edge, up to 7 by 1.3 mm, entire, brown, dark near attached points, long downy hairy. Stipe on tall phyllopode 2–12 cm high, sttamineous, hairy, up to 20 cm or more long including phyllopode. Lamina simple, narrowly lanceolate, gradually narrowing towards both ends, up to 30 by 4.5 cm, the margin entire but more or less undulate, herbaceous to softly papyraceous; veins once or twice forked near midribs, costa and veins underneath as well as under surface of lamina hirsute but glabrous at margin of lamina. Sori in one regular row close to costa or rather irregularly arranged near costa, dorsal on acroscopic veinlets; indusia up to 2.2 mm broad, hirsute or glabrescent.

Thailand : NORTHERN: Chiang Rai (Doi Pha Cho), Chiang Mai (Fang, Doi Chiang Dao, Doi Suthep, Ping Khong, Doi Saket, Mae Klang), Lampang (Ngao), Phrae, Tak (Doi Hua Mot); NORTH-EASTERN: Loei (Phu Kradueng, Phu Tong, Phu Luang); EASTERN: Chaiyaphum; SOUTH-EASTERN: Chanthaburi (Laem Sing, Khao Sabap), Trat (Khao Kuap); SOUTH-WESTERN: Kanchanaburi (Hat Phalom, Sai Yok); PENINSULAR: Ranong (Ko Phayam), Phangnga (Khao Phra Mi), Krabi (Ko Pu), Nakhon Si Thammarat (Thung Song).

Distribution : Burma and S China (type) to Malaya.

Ecology : The habitats of this species are varied according to the localities: terrestrial on rather dry slopes in mixed forests, growing in crevices of rocks in open areas or in light shade, or on limestone hills in evergreen forests, or epiphytic on tree-trunks.

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