231 Kortermans 9089, Meijer 577, 872 – all L differ by having fewer and brownish
paleae but agree in distribution of paleae, and in frond form and colour. Diplazium lomariaceum
is very closely related to D. pophyrorachis and until now the name sees to have been ignored since Christ himself reduced lomariaceum to
porphyrorachis in Ann. Jard. Bot. Buitenz. 15 1989, p. 119.
35. Diplazium loerzingii Praptosuwiryo, sp. nov
.
TYPE: SUMATRA. North Sumatra, E. Mount Sibajak, Upper Petani Valley, primary forest, 1250-1350 m, 5 Feb. 1929, J.A. Lörzing 15124 holotype,
BO. Rhizoma breve erectum. Stipites ad 45 cm longi, in sicco brunnei, basin
versus aquamis brunneis nitidis lanceolatis, ad 13 mm longis 1.5 mm latis integris acuminatis vestiti. Lamina pinnata lanceolatis, ad 75 cm longa et 32 cm supra
basin lata, pinnae ad 24-jugatae; rachis supra sulcata, infra acem gemmifera. Pinnae subbasales maximae 1-3 jugatae deflexae, petiolulatae ad 5 mm longae,
lanceolatae, ad 17.5 cm longae, 2.8 cm latae, basi truncatae, apice attenuatae, margine ½-23 costam lobatae; lobi maximi ad basim, 5-9 mm lati, apice truncati,
margine apices leviter dentati. Rachis supra sulcata, glabrae, infra apicem gemmifera. Textura subcoriacea vel plus solid; in vivo colorae supra atroviridis,
subtus pallidus. Venae perspicuus in uno lobo 3-5 jugatae, plerumque 5 jugatae, omnes simplices. Sori medius in 13-34 longitudine venularum. Indusia
brunneus, in affixus atro brunneus, marginem integrum, non revolutus, persistens. Rhizome short, erect, scales densely on younger part; scales lanceolate, 7-
13 mm long, 0.5-1.5 cm broad, dark brown-blackish, with thickening black strands, shining, margin entire. Stipe 33-45 cm long, 4-5 mm thick, pale brown
when dry, black at base, fallen scales. Lamina lanceolate, pinnate, 61-75 cm long, 24-32 cm broad, pinnae 22-24 pairs below pinnatifid triangular apex of lamina.
Lower pinnae stalked to 3-5 mm long, 2.3-3.6 cm apart, oblong-lanceolate, larger ones 10.3-21.3 cm long, 1.8-3.2 cm broad, base of 1-3 pairs basal pinnae cut away
lower, base truncate, margin lobed to ½-23 way to costa, apex attenuate, toothed; upper ones adnate-sessile; lobus widest at base, larger ones 5-9 mm broad, ends
truncate, slightly toothed. Rachise gemmiferous, bearing buds at the adjacent
232 between rachis and costa, glabrous, costa glabrous. Texture subcoriaceous or
firmer, dark green upper surface, pale green lower when living. Veins free, pinnate in the lobus, mid-veins of lower lobus forming angle 70-75 ° to costa,
veinlets 3-5 pairs, commonly 5 pairs, distinct, simple, all reaching margin, forming angle 25-30º to midveins. Sori medial, leaving sterile part of veinlets
1.5-2.5 mm or close to margin of lobus, elongate cover 13-34 of veinlet length, basal acroscopic diplazioid. Indusia broad, brown, attachment side darker, margin
entire, opening when mature, not rolled back, persistent. PARATYPE. JAVA. West Java, Mt. Halimun, track Cikuda Paeh-
Cikaniki, ca. 1300 m, 25 February 2006, T.Ng. Praptosuwiryo 2339 BO. SUMATRA. Sibolangit Nature Reserve, 400-500 m., 10 December-1928, J.
Buumee A. 841; Jambi, Kerinci Seblat National Park, Sungai Penuh, Bukit Tapan, secondary forest Pal 823-829, 1360 m, 9 Sept. 2006, T.Ng. Praptosuwiryo
2519, 2520, 2521 BO. CHROMOSOMES. 2n = 82 Cytotype: T.Ng. Praptosuwiryo 2339c , 123
T.Ng. Praptosuwiryo 2339d. DISTRIBUTION. Java and Sumatra.
ECOLOGY. Secondary and primay forest, light-deep shady places, on moist and humus rich soil. 1250-1400 m.
NOTES. Diplazium loerzingii is closely related to Diplazium malaccense. This species differs from D. malaccense in the following characters: lower base
of 1-2 pairs basal pinnae less cut, base of lower pinnae almost equally truncate, texture thicker or subcoriaceous, upper rachis much gemmiferous, lobes truncate,
sori medial on veinlets or close to margin, attachments sides of indusia darker. ETYMOLOGY. This species is named after J.A. Lörzing who collected
this plant for the first time. He collected D. loerzingii in 1920 at Mt.Sibajak Sumatra. Nine year after that he collected this plant again in the same place. C.J.
Brook also found this species at Mt. Dempo Sumatra in 1923. I found this plant at Mt. Halimun Java and Bukit Tapan Kerinci Seblat National Park, Sumatra
respectively in Februari and September 2006.
233
36. Diplazium malaccense Presl
