Diplazium prescottianum Wall. Moore Diplazium prescottianum Wall. ex Hook Moore

250 and meet rachis; frond narrowing gradually towards base, drying dark greenish brown. While D. porphyrorachis reveals scales brown that present on stipe, rachis, and costae beneath; frond not or only moderately narrowed downwards, drying dull grayish brown.

48. Diplazium prescottianum Wall. Moore Diplazium prescottianum Wall. ex Hook Moore

, Ind. Fil.: 156, 334. 1859; Holttum, Gard. Bull. S.S. 11: 94. 1940.; Tagawa K. Iwats., Southeast As. St. 5: 103. 1967; Acta Phytotax. Geobot. 23: 56. 1968. –Asplenium prescottianum Wall. ex Hook., Sp. Fil. 3: 251. 1860. –Diplazium sylvaticum var. prescottianum Wall. ex Hook. Bedd., Handb.: 178. 1883. –Athyrium prescottianum Wall. ex Hook. Holttum, Rev. Fl. Malaya 2: 557. 1955. Rhizome short, erect, bearing thick black roots; scales dark brown, about 15 by 1 mm, entire. Stipe about 80 cm long, stramineous with dark brownish base, glabrous. Frond oblong, about 50 by 20 cm, pinnate; lateral pinnae stalked, ascending, falcate, caudateiattenuate at apex, rounded to moderately auricled at acroscopic and cuneate at basiscopic bases, up to 15 by 1.7 cm, shallowly crenate, terminal pinna not distinct with deeply lobed base, the lower ones like the upper lateral pinnae; thin chartaceous, dark green with paler lower surface, glabrous; costa raised below, veins twice or thrice forked, all free, glabrous. Sori elongate along basal anterior veinlets or rarely along basal posterior ones; indusia thin but firm, persistent. SPORES. Monolete, bilaterraly symmetrical made asymmetric by perine, heteropolar, polar outline excluding perine transversely elliptical; equatorial longitudinal view plano-convex; equatorial transverse view, proximal face planar, distal face concave; perinate. E: 32.7239.1151.44±5.16, P: 20.2324.7933.56±3.63. Laesura: concealed by perine. Perine: alate, costate- alate, loosely reticulate; irregular envelope separated from exine surrounds the spore in continuous anastomosing wings, forming a loose reticulation; lacunae large, irregular polygons 5-8 µm; thin wing-like muri project 4-9 µm , terminating margins ciliate or echinate. Exine: visible through perine, smooth-granulate under SEM. DISTRIBUTION. Malaya Peninsula. 251 ECOLOGY. On humus-rich mountain slopes in dense forest at 1500 – 2000 m sea level. SPECIMENS EXAMINED. MALAY PENINSULA. Perak: Kinta s.n January 1885, C. Curtis 3369; Larut, C.G. Mathew s.n. 1905. Singapore: Ridley s.n. 1892; J.Sinchlair 9376. Selangor: H.L. Hume 8997; H.L. Hume 9347. NOTES. No. Coll. J. Sinclair 9376 12 March 1958 showed a few differences to the description of Holttum 1940, basal veinlets of some pinnate vein group area sometimes uniting. But J. Sinclair stated in his notes that this specimen matches the type specimen of D. Prescottianum Aspidium Prescottianum Wall.. For clarification, therefore, the type specimen should be seen and compared to the Sinclair’s specimen.

49. Diplazium procumbens Holttum