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TONQUIN FERNS.
263
li-2 ft. loDg, 4-5 in. broad, moderately firm iu texture, green on
both surfaces, glabrous except on the midrib of the pinnaj. Piuna3
very numerous, sessile, lanceolate, subentire ; central 2-2^ in.
long, 1 in. broad ; lower gradually shorter. Veins very distinct,
erecto-patent, forked, Sori very numerous, submarginal, terminal
on the veins. Indusium semiorbicular, glabrous. — Near D.
Hookeriana.
1790. D. marginalis Baker.
46. ,, var. D. calvescens Wall.
1016. D. rhomhoidea Wall.
73, 79, 1874, 1875. D. Sj)ehincce Baker, forms.
40, 105. D. tcnuifoUa Sw.
122, 125, 1954, 1972. Lindsmja flahelhdata Dryand.
1962. Adianlum lumdatum Burm.
134, 1964. Adiantum Balansse, n. sp. — Eootstock erect.
Stipes tufted, castaneous, h ft. long, with a few small brown linear
paleaB towards the base. Frond lanceolate, simply pinnate, a foot
long, above 2 in. broad, moderately firm in texture, bright green
and glabrous on both surfaces ; rachis and petioles narrowly
winged. Pinna? (juadi-ate, the lower deflexed, the upper spreading
horizontally, the largest f in. broad, entire on the lower and inflexed
inner margin, shghtly toothed and soriferous on the upper and
outer.
long.
Veins fine, flabellate. Sori numerous, l-12th to l-8th in.
Indusium narrow, glabrous. — '^eax A. Mettenii Kuhu. In
1904 the pinnae are smaller, thinner, and more deeply toothed than
m 134, but it is doubtless another form of the same species.
135, 1957, 1958. A. caudatuin L.
1966. A. Cap illus -veneris L.
133, 1953. A.jiahellulatumlj.
129. Cheilanthes mijsurensis Wall.
126. C. tenuij'olia Sw.
57. Pellcea nitidula Baker.
Ill, 113, 1969. Pteris longifoUa L.
107, 1955. P. cretica L., iorms.
(16*), 1970. Pteris dissitifolia, n. sp. — Stipe pale brown,
naked, li-2 ft. long. Frond subdeltoid, bipinnate, \h ft. long, a
foot broad, green on both surfaces, glabrous. Pinnse few, lanceo-
late, erecto-patent, the lowest the largest, forked at the base, their
rachises winged throughout ; final segments distant, lanceolate,
ascending, ^ in. broad, the lower 2-3 in. long, decurrent at the
base. Veins distinct, erecto-patent, deeply forked. Sori continuous
along both margins of the segments and their decurrent
bases. Indusium narrow, glabrous.—Allied to P. him/iiiinmila Wall.
54. P. quadrlaurita Retz., var. P. aspericaidis Wall.
1978. P. (Jrcdllcana Wall.
60. P. hiaurita L.
1959. P. incisa Thunb., var. P. aiirita Blume.
1884. Loiaaria adnata Blumo.
141. Bleclinnm oricnlale L.
175, 1974. Ccratopteria thaliclruides Broug.
69. Asji/,)iiiii» nidus L.