244 acroscopic diplazioid.. Indusia very thin, narrow, light brown, persistent, rolled
back, margin lacerate. DISTRIBUTION. Java.
ECOLOGY. This psecies is found in moist soil, red clay mixed with humus rich soil, in shady place at about 1300 m.
NOTES. Diplazium parallelivenium closely related to D. vestitum. This species differ from D. vestitum on the following characters combinations: Stipe
smooth, not muricate or spiny; pinnulae lanceolate; midvein commonly forming angle 60º to costa; sori is not more than ½ of veinlets length; indusia rolled back,
lacerate. D. parallelivenium is also closely related to D. dolichosorum . The two species share lineary black scales, pinnulae with truncate base and shallow
incision margin to form truncate lobes, and free simple veinlets. D.
parallelivenium differ from D. dolichosorum on the following character
combinations: lamina subdeltoid, pinnulae lanceolate with sharply acuminate or attenuate apex, basal acroscopic veinlets parallel to the other veinlets; while D.
dolichosorum have lamina ovete, pinnulae oblong with acute or acuminate apex,
basal acroscopic veinlets curved. ETYMOLOGY. The species epithet parallelifolium is used because basal
acroscopic veinlets are parallel to the others. It is a distinct character that differentiate from other bipinnate West Malesian Diplazium species.
44. Diplazium petiolare C. Presl
Diplazium petiolare C. Presl, Epimel. Bot.: 86. 1849.
Rhizome short, erect, densely scales on younger part.. Stipe slender, 41.5- 51 cm long, 2-2.5 mm diam. near base, light brown, black at scales base, upper
glabrescent; scales lineary triangular, concolour, dark brown, margin sharply toothed. Lamina pinnate, subtriangular in outline, 34-45 cm long, 17.5-26 cm
broad, pinnae 15-17 pairs below pinnatifid apex of lamina; lower pinnae stalked 2-4 mm long, lanceolate, to 8.2-13 cm long, 2.1-3 cm broad above base, base
subequally cuneate, apex sharply acuminate, margin lobed to ¾ way to costa; lobes about 5 mm wide above base, slightly oblique; rachise glabrescent; texture
herbaceous; light green above when dry, paler beneath, surface naked; veins free,
245 pinate, forming an angle about 60º to costa, veinlets 4- 7 pairs, simple, forming an
angle about 25º to costulets. Sori almost on all veinlet, sometimes the last pair no sori, elongate from near base cover their length, basal veinlets acroscopic,
sometimes subbasal also; indusia brown, persistent, margin entire, opening when mature.
CHROMOSOMES. 2n = 82 Cytotype: TT993.3, BOHB. DISTRIBUTION. Sumatra, Borneo.
ECOLOGY. Occurring on shade places in the forest. Elevation: ca. 450 – -1000 m sea level.
SPECIMENS EXAMINED. --- SUMATRA. Sumatra Utara: K. Iwatsuki, G. Murata, J. Dransfield D. Saerudin S-77. Aceh: S-772; K. Iwatsuki,
G.Muarata, J.Dransfield D. Saerudin S-688.
45. Diplazium poiense C.Chr. in C.Chr. Holttum Diplazium poiense C.Chr. in C.Chr. Holttum
, Gard. Bull. S.S. 7: 269. 1934. --- TYPE: R.E. Holltum 25380 Holotype, SING, Borneo, Tenompok,
Mt. Kinabalu, 1430 m. Rhizome erect, suberect. Stipe dark brown, 35-40 cm long, ca. 4 mm
thick, scales at base; scales brown, shining, lineary lanceolate, 6-8 mm long, 0.25 - 1 mm broad, concolours, margin entire, without thickening black strand.
Lamina pinnate-bipinnate, oblong lanceolate, 38.5 cm long, 17 cm broad, pinnae 27 pairs below pinnatifid apex of lamina; lower painnae stalked to 4 mm long,
subfalcate, to 8.5 cm long, 1.8 cm broad, lower base narrowly cuneate, upper base truncate, apex acuminate, margin lobed ½-56 way to costa; lobus oblong,
oblique, basal acroscopic the largest, 3-5 mm wide, subtruncate-acute, slightly toothed; veins free, pinnate in the lobus, rather hardly observed, veinlets to 10
pairs, simple. Sori impressed, elongate ½-23 from margin; indusia broad, persistent, brown, concolour, margin entire, opening when mature.
DISTRIBUTION. Borneo. ECOLOGY. Growing on shade part of mountain forest at ca. 500-1700 m
sea level.
246 SPECIMENS EXAMINED. --- BORNEO: Kalimantan Timur: M Kato,
M. Okamoto, K.Ueda, E.B. Walujo B-7408; M Kato, M. Okamoto, K. Ueda E.B. Walujo B-7403; J. M.S. Clemens 28412; M. Kato, M. Okamoto E.
B.Walujo B-10908; M. Kato, M. Okamoto E. B.Walujo B-10922; M. Kato, M. Okamoto E. B.Walujo B-9804; M. Kato H. Wiriadinata B-4811.
46. Diplazium polypodioides Blume
