215
21. Diplazium dolichosorum Copel.
Diplazium dolichosorum Copel., Philip. J. Sci. 1 Suppl.: 151. 1906; M.G.
Price, Contr. Univ. Mich. Herb. 16: 195. 1987. --- TYPE: Philippines, Mindanau, Zamboanga, San Ramon, 800 m, Copeland 1716 Holotype, s.n.
Rhizome stout; scales lineary, 1 cm long, black-dark brown. Stipe crowded, ca. 35 cm long, 8 mm thick, base densely scales, muricate, upper;
subglabrous; scales dark, lineary, 4-8 mm long; lamina ovate, 1-1.5 mm long, bipinnate, apex pinnatifid; larger pinnae 45 cm long, 20 cm broad, lower smaller;
pinnulae shortly stalked, subfalcate, to ca. 10 cm long, 2 cm broad, base truncate, apex serrate, margin lobed to 13 way to costa; lobus truncate, toothed; rhachis
glabrescent, grooved on upper surface; texture papyraceous, glabrous, upper surface shiny, lower surface pale; veins free, pinnate in the lobus, veinlet to 6
pairs, simple, lower curved. Sori lineary, to 8 mm long; indusia broad, brown. DISTRIBUTION. Borneo, Philippines
ECOLOGY. Terrestrial. Hill dipterocarp forest. Elevation: 1000 m. SPECIMEN EXAMINED: Borneo: Beaman 10641 K.
NOTES. This species is described based on photograph of specimen deposited at Rijks Herbarium, Kew.
22. Diplazium donianum Mett. Tardieu
Diplazium donianum Mett. Tardieu, Asplén. Tonkin: 58, t 5 1 2.
1932; Tagawa K. Iwats., Fl. Thailand 3 3: 455. 1988. Asplenium donianum Mett., Farngatt. 6: 177. 1859.
Rhizome creeping, 4-5 mm thick, blackish, with leaves 1-2 cm apart, scales on younger part; scales brown shining, ovate-narrowly lanceolate, 2.5-9
mm long, 1-3 mm broad, apex acuminate, brown, margin toohed irregularly with thickening black strand. Stipe longer than lamina, 28-57 cm long, 3-4.5 mm
thick, dark brown and scales at base, upper pale green when living. Lamina simply pinnate, oblong in outline, 30-42 cm long, 15-19 cm broad, lateral pinnae
subalternate, to 4 pairs, terminal pinnae conform to lateral ones; pinnae stalked 3-
216 6 mm long, ovate-lanceolate to narrowly oblong, to 16.2 cm long, 3-4.5 cm broad,
base cuneate, apex acuminate, margin entire, slightly toothed; rachise glabrous; texture firm-papyraceous, upper surface rather light green, glossy, lower pale
green; slightly serrate near apex; veins group forming angle 55-60º to costa, free, forked near costa, upper branch simple or one forked and soriferous, lower forked
1-4 times again, outer usually also soriferous but shorter. Sori bearing on outer veins, sometimes also on inner ones, basal acroscopic usually the longest,
diplazioid, elongate from near costa almost reaching the margin; indusia concolour, brown, rolled back, margin subentire, persistent, opening when mature.
ANATOMY. Transverse section of stipe near lamina: Vascular bundle form an uninterrupted U-shaped, with an angle 110, flat base both inward and
outward, angles not forming ridges, ends slightly ridges outward. CHROMOSOMES. 2n = 164 Cytotype: XIX.C.III.65, BOHB, living
plant is cultivated at Bogor Botanic Gardens. DISTRIBUTION. Japan, Taiwan, S. China, Indochina, Thailand, India,
Sumatra, Java, New Guinea. ECOLOGY. On mountain slopes in light shade or in dense primary forest,
at low elevations lower than 1300 m. SPECIMENS EXAMINED. --- JAVA: T.Ng. Praptosuwiryo 2340. ---
SUMATRA: XIX.C.III. Cultivated at Bogor Botanic Gardens. NOTES. This species is new record for Java and Sumatra. Kato 1995
also reported chromosomes number ’n’= 164 apogamous.
23. Diplazium esculentum Retz. Sw
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