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43. Diplazium parallelivenium Praptosuwiryo, sp. nov. Plate 10.
TYPE: Java, West Java, G. Halimun, Track Cikuda Paeh – Cikaniki, ca. 1300 m s.l., 25 February 2006, T.Ng. Praptosuwiryo 2338 holotype, BO.
Rhizoma breve erectum. Stipitus 62 cm longis, 8 mm crassis in sicco niger in basi, squamis sparsim penitus; squama bruneis nitidis linearis lanceolatis
ad 6-12 mm latae 0.5-1 latae, margine dentatis cum filum niger spissescens. Lamina ad 94 cm longis et latis, bipinnata sudbeltoideus, pinnae 9-jugatae; pinnae
inferiora stipitae ad 3.2 cm longis, oblongis subtriangularis, ad 48 cm longis 29 latis, pinnulae 9-11-jugatae; pinnulae inferiora stipitae ad 3.5 mm longis, pinnulae
superiora adnatae latisissimis cuneatis; pinnulae magniore ad 14.7 cm longis 3.2 cm latis, lanceolatis, basin truncatus, margine 15-13 costam lobatae, plerumque
15-14 costam lobatae, apice attenuatis; lobi ad 9 mm latis truncates dentatis, lobi basalis basiscopicus magissimathe; venae liberis, in lobo pinnatus, venae
principalis angulum fere 60º cum costa formantes, venulae 6-7-jugatae, simplices vel furcatis in lobi basalis acroscopicus, venulae basasimus acroscopicus
nondilatatus. Sori costulis, in ½ vel minus longitudine venularum 2.5-7.5 mm latis, basalis acroscopicus diplazioideus. Indusiis tenuis angustatus dilutus
brunneus, persistens, revolutus, laceratus. Rhizome stout, short, erect, scales on younger part. Stipe 62 cm long, 8
mm thick when dry, black at base, sparsely scales throughout; scales dark brow, lineary lanceolate, 6-12 mm long, 0.5-1 mm broad, margin toothed with
thickening black strand regularly. Lamina subdeltoid, ca. 94 cm long and broad, bipinnate, pinnae 9 pairs; lower pinnae stalked to 3.2 cm long, oblong
subtriangular, to 48 cm long, 29 cm broad, pinnulae 9-11 pairs; lower pinnulae stalked to 3.5 mm long, upper pinnulae adnate with broadly cuneate; larger
pinnulae to 14.7 cm long, 3.2 cm broad, lanceolate, base truncate, margin lobed 15-13 way to costa, commonly 15-14 way, apex attenuate; lobes to 9 mm wide,
basal basiscopic the largest, ends truncate, toothed; veins free, pinnate in the lobes, midveins commonly forming angle about 60º to costa, veinlets 6-7 pairs,
simple or once forked on bosal acroscopic lobes, basal acroscopic ones not dilated. Sori costular, cover ½ or less of veinlets length 2.5-7.5 mm, basal
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
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