269 ANATOMY. Transverse section of stipe near lamina: Vascular bundle
form an uninterrupted U-shaped with an angle 100º, angles ridges outward, end ridges outward and shallowly grooved.
CHROMOSOMES. 2n = 82 Cytotype: T.Ng. Praptosuwiryo 2292, BO. DISTRIBUTION. Java.
ECOLOGY. Growing on on humus rich soil rather opened places of secondary mountain forest.
SPECIMENS EXAMINED. --- JAVA: van Steenis 10979; T.Ng. Praptosuwiryo 2292.
61. Diplazium subserratum Blume Moore
Diplazium subserratum Blume Moore. Index 338. 1862; Backer
Posth., Varenfl. Java: 126. 1939; Holttum, Gard. Bull. S.S. 11: 104. 1940. --- Asplenium subserratum
Blume, En. Pl. Jav. 1828. TYPE: C.L. Blume s.n. holotype, L, G. Parang, Java.
Rhizome slender, erect, suberect. Stipes slender, clustered, up to 22 cm long, dark brown, blackish toward base, glabrescent, minutely scaly at base, more
dense when young, slightly grooved above; scales oblong subtriangular, about 1 mm long, less than 1 mm wide at base, apex acuminate, margin shortly toothed.
Lamina simple, lanceolate up to 39.5 cm long, 3.7 cm wide at middle, narrowed gradually toward attenuate apex; margin entire or irregularly undulate in lower
part, toothed towards apex; herbaceous shoftly papyraceous; midrib grooved above, prominent beneath, scatteredly dark brown oblong subtriangular scales 1
mm long or less; veins free, in small group at angle about 60 to midrib, up to 6 mm apart; veins group forked at midrib, upper branch simple, usually soriferous,
lower brach forked 2-4 times, sometimes soriferous also. Sori on acroscopic veinlets diplazioid in various length, others simple, shorter; indusia very firm,
brown when dry, margin entire, rolled back when old, persistent. SPORES. Monolete, bilaterally symmetrical, heteropolar; polar outline
elliptical, sides convex; equatorial longitudinal view concave-convex to plano-
270 convex; equatorial transverse view, proximal face planar to concave, distal face
hemispherical; perinate. Size: E:27.8841.1945.49±5.03, P: 16.54 27.1320±5.03. Laesure: concealed by perine ridge. Perine: costate-alate,
irregular envelope, separated from exine; costae form irregular loose reticulation; lacunae irregular polygons c.to 23 µm across; interior of lacunae and costae
smooth. Exine: visible throught perine, smoothly granulate under LM. ANATOMY. Transverse section of stipe near lamina: Vascular bundle
form an interrupted U-shape that formed by two ovale leaf traces, with an angle about 110º.
CHROMOSOMES. 2n = 82 T.Ng. Praptosuwiryo 1463, BO, 123 T.Ng. Praptosuwiryo 1072, BO, 164 T.Ng. Praptosuwiryo 1380, BO.
DISTRIBUTION. Sumatra, Malaya, Borneo, Java. ECOLOGY. On moist mountain slopes by stream in evergreen jungle at
about 700- m. SPECIMENS EXAMINED. --- MALAY PENINSULA: H.N. Ridley s.n.
1895; H.N. Ridley s.n. May 1891; A.G. Piggott 1704. --- BORNEO: M. Kato, G. Murata Y.P. Mogea B-3804; M. Kato, G. Murata Y.P. Mogea B-3506; J.
M.S. Clemens 20406; M Kato, G. Murata Y.P. Mogea B-3804; B-3506; J. M.S. Clemens 20406. --- SUMATRA: T.Ng. Praptosuwiryo 2538, 2538b,
2538c, 2538e. --- JAVA: T.Ng. Praptosuwiryo 1311, 1370, 1372, 1376, 1378, 1379, 1380, 1381, 1439, 1441, 1458, 1459, 1462, 1463, 1512, 1705, 1706, 1765,
2278, 2283, 2286, 2287, 2289, 2290,
2294, 2295, 2296, 2299, 2301.
NOTE: Alderwerlt 1920 recognized two forms united by intermediates. Forma tytica with fronds bluntly crenulate to toothed at or towards the apex and
distributed in Java and Malacca. The second form, viz. Forma lobata, revealed fronds coarsely toothed or even lobed throughout and found in Sumatra Deli,
Sibolangit, W. Docters van Leeuwen No. 161. The intermediates forms is showed J.A. Lörzing No. 5043 from Sumatra Deli, Bandarbaru is intermediate between
both forms.
271
62. Diplazium subvirescens Praptosuwiryo, sp. nov. Plate 13 14.
