638 FILICES. [Hymenophyllum. 
. H, recurvum, Gaud. in Bot. Voy. Freyc. p. 376. — Rhizome creeping, 
eis naked. Stipites distant, slender, 2—3‘’ long, winged above. 
Frond flaccid, olivaceous, Slistietcik; lanceolate, acuminate, narrowing below, 
4—12' < 2—3', tripinnatisect, the apices of the frond and pinnae ge- 
nerally recurved, the main rhachis oe winged throughout. Pinnae 
rather distant, erect-patent, lanceolate, abscisso-truncate, long acuminate, 
divided nearly to the rhachis into simple or forked or dimidiately com- 
pound segments or pinnules, the ultimate segments linear, ' je’ broad, 
each with a single vein. Sori 2—6 to a pinna, on both sides, axillary 
or on very short lateral segments. Invol. haves not immersed, ovate, 
divided about halfway; the valves rounded, entire, as broad as their 
segments or broader. — Bot. Beech. p. 109. — Hook. Sp. Fil. I, 104, tab. 37. 
— amt Fil. p. 61. — Brack. Fil. U. 8. E. E. p. 269 
, common, not known from elsewhere, but tm from the Samoa 
is er, 1105), one H. dilatatum by Luerssen, although yank is aon like it. 
2. ae Sees Hook. & Arn. in Bot. Beech. p. 109. — Rhizome slender, 
creeping, fibrillose.. Stip. distant, slender, fibrillose when young, 1—2‘ 
long. Frond olivaceous or brownish when dry, lanceolate, 2—6' X 1—2', 
bi-, tripinnatifid, with the rhachis flexuose and sparingly fibrillose, winged 
aly in its upper portion. Pinnae rhomboido- oblong, rather obtuse, cut on 
both sides to near the rhachis into linear bifid and subrhomboidal segments, 
the latter deeply incised in a flabellate manner; the linear segments Vig‘! 
broad and ciliate only on the margins and vein, the simple rufous hairlets 
single or two from a common basis. Sori small, 2—8 to a pinna, terminal 
on the segments, immersed. Invol. about !/2'’, rounded or ovate, divided 
. the valves ciliate, entire. a Fil I, 94, tab. 34. — Synops. Fil. 
p- — ck 7. B 268. 
rees; rare, but on all islands! In appearance like the preceding species, but 
bite and less acuminate. 
3. H. obtusum, Hook. & Arn. in Bot. Beech. p. 109. — Rhizome filiform, 
much entangled, — Stip. 'j2—2‘ long, = palceaeue ciliate with 
stellate articulate hairs which mostly divide into r 3 branches. Frond 
1—21/2' X 1/4—11)2’, irunctibide or oblong narrowing below, or cuneate 
with truncate apex, reddish-brown when dry, densely hispid, the main 
rhachis winged (except the lowest internode) in the elongate form, tri- 
pinnatifid. Pinnae ascending, close, the longest 1/2-—11/2‘, deltoid or di- 
midiate-rhomboidal, obtuse, with a cuneate base, cleft in a sub-flabellate 
manner he rhachis into long linear or bifid segments, the ultimate 
fork-branches of equal length, 1/3 broad, the outer ones all soriferous 
at cele apex. Sori 2—11 to a pinna. Sve. small, '/2‘, orbicular, with a 
broad base, deeply cleft, densely hispid. — Hook. Sp. Fil. I, 93, tab. 33. 
— Synops. Fil. p. 63. — Brack, l.c. p.263. — Fronds of young plants are sub- 
