234 Nur s.n. 29 Nov. 1923. Melaka: A. Derry 14. Penang: R.E. Holttum SFN
31196. --- BORNEO. Kalimantan Timur: K. Ueda D. Darnaedi B-8982; M. Kato, M. Okamoto E.B. Walujo B-9070; M. Kato, M. Okamoto, K. Ueda
E.B. Walujo B-7398; M. Kato, M . Okamoto E.B. Walujo B-10909; M. Kato, M. Okamoto, K. Ueda, E.B. Walujo B-7871; K. Iwatsuki, M. Kato, G. Murata
Y.P. Mogea B-2472. Kalimantan Selatan: M. Kato, G. Murata Y.P. Mogea B- 4155; 4175. --- SUMATRA: W.J.J.O. de Wilde B.E.E. de Wilde – Duyfjes
12560; W.J.J.O. de Wilde B.E.E. de Wilde – Duyfjes 12920; T.Ng. Praptosuwiryo 2218, 2220, 2209, 2217, T.Ng. Praptosuwiryo 2223, 2224, 2225,
2226, 2229, 2230, 2233, 2235, 2236, 2237, 2238.
37. Diplazium megasegmentum Praptosuwiryo, sp. nov. Plate 7.
TYPE. JAVA. West Java, Mt. Salak, Southern Slope, Cangkuang Forest, 19 December 2002, T.Ng. Praptosuwiryo 1382 foto holotype, BO.
Rhizoma breve erectum, crassum. Stipites ad 122 cm longis, prope basin 10 mm crassi, in sicco brunneis, basin versus squamis deciduis nigris rotundis vel
ovatis peltatis integris imbricates vestitae. Lamina ad 100 cm longae, 80 cm latae, subdeltoideus, tripinnatifidus, pinnae ad 14-jugatae; pinnae inferus bipinnatidus,
stipites ad 3.5 cm longae, lanceolatus, 50 cm longae 26 cm latae, libere pinnulae ad 16-jugatae, apice pinnatifidus; pinnulae inferus subalternatus, 2.5-3.5 cm
seorsum, stitipatae ad 3 mm longae, oblongus-lanceolatus, ad 13 cm longae 3.5 cm latae, basi truncatae, apice acumitae, margine lobatae segmenta formantes,
segmenta inferiora plus minusve opposite, 2.5-5.0 mm seorsum, sessilis; segmenta superus subalternate; segmenta maximae 2.4 cm longae et 8 mm latae,
apice rotundatus-acutus, margine 13-12 versus venae principalis; pinnae medius pinnatus, pinnae superus pinnatifidus. Venae liberis, in segmento pinnatus,
venulae ad 6-8-jugatae, in lobo furcatis vel bifurcate. Sori e basi venulae ramis acroscopicus 13-12 extensi, plerumque in basi venulae acroscopicus
diplazioideus. Indusiis brunneus, margine laciniatus, ante sporangiis maturis aperiens, persistens.
235 Rhizome erect, stout. Stipes dark brown, 122 cm long, 10 mm diam. near
base, fallen scales; scales rounded, ca. 6 mm long and broad. Lamina bipinnate- tripinnatifid, subdeltoid in outline, 100 cm long, 80 cm broad, pinnae to 14 pairs,
lower pinnae bipinnatifid, middle pinnae pinnate, upper pinnae pinnatifid. Larger pinnae stalked to 3.5 cm long, lanceolate, 50 cm long, 26 cm broad, free pinnulae
16 pairs below pinnatifid apex of pinnae. Lower pinnulae subalternate, 2.5-3.5 cm apart, shortly stalked to 3 mm long, oblong-lanceolate, 13 cm long, 3.5 cm
broad, base truncate, apex acuminate, margin lobed deeply to whitin 1 mm of costa forming segments; lower segments opposite, 2.5-5.0 mm distance, sessile;
upper segments subalternate below deeply lobed acuminate apex of pinnulae; larger segments oblong, 2.4 cm long, 8 mm broad, apex rounded-acute, margin
lobed 13-12 way to main vein. Veins free, pinnate in the segments, to 6-8 pairs Veinlets once-twice forked in lobes. Sori bearing on basal acroscopic branch of
veinlets, elongate from basal covers 13 -12 of their length, diplazioid on basal acroscopic veinlets. Indusia brown, persistent, opening when sori young, margin
laciniate. PARATYPE. Java: West Java, Mt. Salak, Southern Slope, Cangkuang
Forest, 28 December 2002, T.Ng. Praptosuwiryo 1443, 1450, 1451, 1452. SPORES. Monolete, bilaterally symmetrical mades asymmetric by
perine, heteropolar; polar outline excluding perine transversely elliptical, sides convex; equatorial longitudinal view excluding perine concave-convex;
equatorial transverse view, proximal face convex, distal face convex; perinate. E: 39.6151.4257.01±4.28; P: 18.5131.4935.85±3.59. Laesura: concealed by
perine. Perine: alate; alae sometimes loosely reticulate; wing-like muri project 4- 13 m, terminating margins almost entire.
DISTRIBUTION. Java. ECOLOGY. Diplazium megasegmentum is growing well on moist humus-
rich soil in shady places. NOTES. Diplazium megasegmentum is very distinct among Javanese
species Diplazium in the combination of the following characters: pinnules cut to within 1 mm of costa to form a big oblong segments to 8 mm broad that lobed
again to ½ way to main vein; basalis sori which not more than half away to the
236 main vein. It is grows on moist humus-rich soil in shady forest in southern slope
of Mt. Salak West Java. ECOLOGY. The species epithet is from the Latin mega and segmentum
meaning the large segment in illustrating the large size of its large lobed segments.
38. Diplazium megasimplicifolium Praptosuwiryo, sp. nov. Plate 8.
