A TAXONOMIC REVISION OF HYMENOPHYLLACEAE

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4. Subgenus Lacostea (Bosch) C. Chr.
BLUMEA — Vol. 51, No. 2, 2006
Trichomanes L. subg. Lacostea (Bosch) C. Chr. (1906) 634. — Lacostea Bosch (1861a) 320. — Tricho-
manes L. sect. Lacostea (Bosch) H. Christ (1897) 29. — Lectotype: Lacostea brachypus (Kunze)
Prantl (= Trichomanes pedicellatum Desv.) (selected by Christensen (1906) XIV, as ‘T. pedicellatum
Desv.’).
Rhizomes long-creeping, frequently branching, rather thick, 0.5–1.2 mm diam., sparsely
to densely covered with brown hairs, protostele massive, cortex heterogeneous, roots
numerous and robust terrestrially, rootless at the climbing part. Stipes very short and
unclear, subdistant to remote. Blades once-pinnate with symmetric pinnae, occasionally
finer (up to tripinnatifid), elliptic, 30 by 9 cm, venation anadromous, false veinlets
absent, internal cell walls slightly thick and wavy. Sori paratactic, tubular, lips truncate
or sometimes dilate, receptacles long-exserted.
Distribution — The Neotropics; more than 4 species.
Habitat — Lianas on tree trunks.
Note — Corresponding to a part of the Da subclade in Ebihara et al. (submitted).
RepResentative species:
Trichomanes ankersii C. Parker ex Hook. & Grev.; T. pedicellatum Desv.; T. tanaicum Hook.;
T. tuerckheimii H. Christ.
8. CEPHALOMANES
Cephalomanes C. Presl (1843) 17, t. V. — Lacostea Bosch sect. Cephalomanes (C. Presl) Prantl (1875)
50. — Trichomanes L. subg. Cephalomanes (C. Presl) C. Chr. (1906) XIV. — Trichomanes L. sect.
Cephalomanes (C. Presl) C.V. Morton (1968) 189. — Type: Cephalomanes atrovirens C. Presl.
Rhizomes erect to short-creeping, thick, usually densely covered with old stipes,
protostele massive, cortex homogeneous, roots numerous and robust. Stipes 2–15 cm
long, close to each other. Blades once-pinnate with asymmetric pinnae, narrowly elliptic,
10–20 by 3–4(–5) cm, venation anadromous, false veinlets absent, internal cell
walls thick and coarsely pitted. Sori paratactic, campanulate, lips sometimes dilate,
receptacles long-exserted.
Distribution — The Paleotropics (Asia to the Pacific); c. 4 species.
Habitat — Terrestrial or epilithic along streams.
Chromosome base number — x = 32.
Note — Corresponding to the Ce clade in Ebihara et al. (submitted).
RepResentative species:
Cephalomanes atrovirens C. Presl; C. crassum (Copel.) M.G. Price; C. javanicum (Blume) C. Presl.
The Malagasian Trichomanes madagascariense (Bosch) Moore has traditionally been placed in this
group, but unpublished molecular data suggest its exclusion. Further investigations are needed.
9. CALLISTOPTERIS
Callistopteris Copel. (1938b) 64. — Trichomanes L. sect. Callistopteris (Copel.) C.V. Morton (1968)
190. — Cephalomanes C. Presl subg. Callistopteris (Copel.) K. Iwats. (1984) 176. — Type: Callistopteris
apiifolia (C. Presl) Copel.
Rhizomes erect to short-creeping, quite thick, hairy at apices, protostele massive, cortex
homogeneous, roots numerous and robust. Stipes 5–25 cm long, close to each other,