Diplazium hottae Tagawa Biosystematic Study Of The Fern Genus Diplazium In West Malesia

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28. Diplazium hottae Tagawa

Diplazium hottae Tagawa, Acta Phytotax. Geobot. 25 2-3: 65. 1972. --- TYPE: Hotta 15185 Holotype, KYO, n.v., Gunung Mulu, Sarawak.; Kokawa Hotta 2364, 2415 Paratype, KYO, n.v.. Rhizome shorth, stout, erect. Scales on stipes light brown, shining, concolours, 9-15 mm long, 1-2 mm broad.margin entire, Stipe 56-67.5 cm long, 3- 6 mm diam. at base stramineous, deeply grooved upper surface, base dark brown, scales, upward glabrous. Lamina oblong, lanceolate, ca. 85 cm long, 36 cm broad, pinnae 11-21 pairs; lower pinnae stalked to 5 mm long, lanceolate, larger pinnae 28 cm long, 2.5 cm broad, base narrowly cuneate, apex acuminate and slightly crenate, margin entire; rachis glabrous, gemmiferous at the adjacent between rachise and costa near terminal pinna; veins group forming an angle about 45º to costa; veins forked near costa, upper branch simple, lower branch forked again once-twice; Sori elongate along acroscopic branch, mostly not so close to costa, almost reaching the margin; indusia light brown, shining, margin entire, rolling back, not so broad. DISTRIBUTION. Sumatra, Borneo, ECOLOGY. Terestrial on rather dry mountain in light shade. 300 – 1350 m. VERNACULAR NAMES. Paku rahang Dayak. USE. Dayak use this plant for medicine. The very young fronds are crushed for sore poultice. SPECIMENS EXAMINED. --- BORNEO: M. Kato, M. Okamoto, K. Ueda 7 E.B. Walujo B-7428; M. Kato, M. Okamoto, K. Ueda E.B. Walujo B- 7675; K. Ueda D. Darnaedi B-11571; M. Kato, M. Okamoto, K. Ueda E.B. Walujo B-7879; T.Ng.Praptosuwiryo 1911. --- SUMATRA: C.J. Brooks 330 S., T.Ng. Praptosuwiryo 2536a. NOTES. Tagawa 1972 stated that D. hottae is allied to D. subintegrum Holtt. Occurring on Malay Peninsula and in Northern Sumatra. This species differs with D. subintegrum constantly in: 1 terminal not lobed at base and similar to apper laterals ones in shape and size, 2 uppermost 1 or 2 lateral pinnae gemmiferous at the base on the rachis, 3 pinnae apparently entire, but in reality 224 provided with minute and remote incision on margin, 4 venation obscure, acroscopic veinlet of group simple and soriferous, basiscopic one once forked and sterile, 5 sori all asplenioid, narrower, very unequal in length, their anterior ends arranged in an intramarginal uneven line, 6 scales at the base of stipe much longer.

29. Diplazium insigne Holttum