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4. Diplazium albido-squamatum Alderw.
Diplazium albido-squamatum Alderw., Bull. Buiten. II no. 23. 9. 1916. --
-TYPE: C.J. Brook 272S. holotype, BO, Soelit, Lebong, Bengkulu, Sumatra; C.J. Brook s.n. isotype, L, Lebong Tandai, Bengkulu, Sumatra.
Stipes 38 cm long, 6 mm thick, grooved above, dark brown-blackish, scales throughout; scales lineary lanceolate or subulate, to 1 cm long, 1 mm wide,
dark brown, margin toothed with thickening black strand. Lamina bipinnate, ca. 70 cm long, ? cm broad, lanceolate in outline, pinnated pinnae 5 pairs below ca.
5 pairs of pinnatifid pinnae, apical lamina ?; lower pinnae stalked, stalked to 17 mm long, 8-10 cm apart, ovate-lanceolate, 15-24.5 cm long, 8.5-9 cm broad,
pinnulae 5-8 pairs; lower pinnulae shortly stalked to 1 mm long or adnate, 2.5-3 apart, upper pinnulae sessile with subequally broadly cuneate; larger pinnulae
oblong-elliptical, 4.8 cm long, 1.9 cm broad, base subequally subtruncates, apex acute, margin lobed ¼-13 way to costule; lobus 4-6.5 mm wide, ends rounded-
subtruncate; texture subherbaceous, upper surface glabrous, to apex vein whitish-limy, dot-like; rachise obscurely dark brown, minutely scales, at length
base persistent scales fallen away rugged; veins free, pinnate, mid-veins forming angle ca. 60º to costule; veinlets 4-6 pairs, length base persistent scales fallen
away rugged all simple, forming angle about 20-25° to costule. Sori elongate along veinlets, cover ½-23 of its length, acroscopic basal diplazioid, others
asplenoid; ndusia dark brown, stiff, margin entire, opening when mature. DISTRIBUTION. Sumatra.
ECOLOGY. Grown in limestone. SPECIMENS EXAMINED. --- SUMATRA: C.J. Brooks 272S.
NOTES. young plants simply pinnate, with the fronds similars to the largest pinnae of the adult ones but less copiously soriferous.
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5. Diplazium angustipinna Holttum Holttum
Diplazium angustipinna Holttum Holttum, Rev. Fl. Malaya 2. Appendix
II: 637. 1966. Athyrium angustipinna Holttum, Gard. Bull. S.S. 14: 8. 1953; Rev. Fl. Malaya 2: 549. 1966. --- TYPE: R.E. Holttum SFN 39416 holotype,
SING, Frasser’s Hill, Pahang, Malay Peninsula. Rhizome short, erect. Stipe to 36 cm long, 3 mm thick, scales at base;
scales narrow, to 8 mm long, 1 mm broad, medium margin entire, some larger ones with black firm edges. Lamina simply pinnate, fertile ones to 41 cm long,
lateral pinnae 4-6 pairs below a terminal leaflet of similar shape; largest fertile pinnae on different fronds 10-18 cm long, 1.6-2.8 cm broad, widest 13 from the
base, tapered evenly to the narrow apex and to the base which is truncate on a stalk 1 mm. long, margin slightly and irregularly sinuous; frond and rachis
glabrous except for very short hairs in groove of upper surface of rachis and small scales on bases of costae; rachise not proliferous; veins anastomousing freely in
outer 13 of each half of the lamina, forking 2 or 3 times before anastomousing. Sori long, diplazioid on acroscopic branch of each first forking, reaching from
costa 23 towards the margin, also 1-3 short sori on distal anastomousing vein- branches; indusia narrow, firm, perisistent, margin entire.
ANATOMY. Transverse section of stipe near lamina: Vascular bundle form uninterrupted V-shaped, with an angle 70º, ends simple, not forming a ridge.
CHROMOSOMES. 2n = 123 Cytotype: T.Ng. Praptosuwiryo 1904, BO, 164 T.Ng. Praptosuwiryo 1905b, BO.
DISTRIBUTION --- Malay Peninsula, Borneo. ECOLOGY --- Terrestrially on humus rich soil or rock soil in dense
jungle. 400-900 m. SPECIMENS EXAMINED --- BORNEO: T.Ng. Praptosuwiryo 1904,
1905b. --- MALAY PENINSULA: R.E. Holttum SFN 3946; King’s 8026.
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6. Diplazium asymmetricum Praptosuwiryo, sp. nov. Plate 1.
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