Volume 3 > Part 3 > Year 1988 > Page 441–442 > Athyriaceae > Cornopteris

Cornopteris opaca (D.Don) Tagawawfo-0001116747

Acta Phytotax. Geobot. 8: 92. 1939; Tagawa & K.Iwats., Acta Phytotax. Geobot. 23: 176. 1969; M.Kato, Acta Phytotax. Geobot. 30: 108. 1979.— Hemionitis opaca D.Don, Prodr. Fl. Nepal.: 13. 1825.— Diplazium opacum (D.Don) Christ, Bull. Acad. Int. Géogr. Bot. 1906: 242. Tardieu & C.Chr. in Fl. Indo-Chine 7(2): 261. 1940. Fig. 46. 10–11.

Accepted Name : Athyrium opacum (D.Don) Copel.
Acta Phytotax. Geobot. 8: 92 (1939)

Description : Rhizome (unknown in Thai plants) thick, ascending to suberect, bearing a few fronds near apex; scales narrow, up to 8 by 2 mm, entire, brown, membranous. Stipe up to 30 cm or more long, stramineous to brown, more or less broadened at scaly base. Frond bipinnate to tripinnatifid, oblong with acute apex and round base, about 50 by 25 cm; pinnae subopposite, ascending, subsessile or shortly stalked in larger ones; rachis grooved, the grooves decurrent to those of pinnae; pinnules of the larger pinnae narrowly oblong-subdeltoid, acute to acuminate at apex, truncate or broadly cuneate at sessile base, about 8 by 2.4 cm, lobed nearly to costule with subquadrangular lobes with obtuse apex and subentire or crenate margin of about 1 by 0.5 cm, pinnules of the upper pinnae like the lobes of larger pinnules; herbaceous to thin-papyraceous, usually blackish when dry; veins pinnate with simple or rarely forked veinlets reaching the very margin of lobes. Sori oblong, costular, naked.

Thailand : NORTHERN: Lampang.

Distribution : N India, Nepal (type) to SW Japan, south to Vietnam, also in Java.

Ecology : Terrestrial on mountain slopes at about 1,000 m alt.

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