Volume 3 > Part 1 > Year 1979 > Page 71–72 > Hymenophyllaceae > Mecodium

2. Mecodium productum (Kunze) Copel.wfo-0001125315

Philipp. J. Sci. 67: 20. 1938; Tagawa & K.Iwats., S.E. Asian Stud. 5: 38. 1967. Fig. 5: 1.

Accepted Name : Hymenophyllum productum Kunze
Bot. Zeitung. 6: 305. 1848; Copel, Philipp. J. Sci. 64: 113 pl. 54. 1937; Holttum, Rev. Fl. Malaya 2: 83. f. 26. 1955.

Description : Rhizome slender, about 0.5 diam. Stipes remote, glabrous but hairy at the very base, 3–5 cm long, the upper half winged with flat or slightly undulate wings. Fronds oblong to oblong-lanceolate, acute at apex, tripinnate to quadripinnatifid, herbaceous, green to deep green, glabrous throughout, (5–)10–13 cm long, upto 5 cm wide; rachis like the upper part of stipes, slightly zigzag in upper part, winged throughout by flat wings 0.4–0.8 mm wide; pinnae up to 10 in pairs, the basal ones triangular-rhomboid, acute at apex, at the base subtruncate anteriorly and cuneate posteriorly, short stalked, up to 4.5 cm long, 2 cm wide; pinnules about 5 in pairs, with 5–10 segments; upper pinnae gradually becoming smaller; ultimate segments narrow, entire and flat at margin, obtuse to retuse at apex, 0.8–1.2 mm broad, the uppermost usually elongate up to twice as long as the normal ones. Sori extruded, lobes contricted below the base of involucre; involucre bilabiate, divided down almost to the base, just triangular, long acuminate at apex, round at base, 1.2–1.8 mm long, less than 1 mm wide; the lips toothed; receptacles clavate to somewhat columnar, included. Cell walls thin, straight.

Thailand : PENINSULAR: Nakhon Si Thammarat (Khao Luang).

Distribution : Malaya, Sumatra, Borneo, Java (type), the Philippines and north to Taiwan.

Ecology : On mossy tree trunks in dense tropical evergreen forests at medium or higher altitudes.

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