A TAXONOMIC REVISION OF HYMENOPHYLLACEAE
A TAXONOMIC REVISION OF HYMENOPHYLLACEAE
A TAXONOMIC REVISION OF HYMENOPHYLLACEAE
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22<br />
BLUMEA — Vol. 51, No. 2, 2006<br />
Habitat — Terrestrial in humid places, or epiphytic on tree trunks including tree<br />
ferns.<br />
RepResentative species:<br />
New combinations:<br />
Vandenboschia boschiana (Sturm ex Bosch) Ebihara & K. Iwats., comb. nov. [based on Trichomanes<br />
boschianum Sturm ex Bosch (1861b) 160]; V. collariata (Bosch) Ebihara & K. Iwats.,<br />
comb. nov. [based on Trichomanes collariatum Bosch (1859) 368]; V. gigantea (Bory ex Willd.)<br />
Ebihara & Dubuisson, comb. nov. [based on Trichomanes giganteum Bory ex Willd. (1810) 514].<br />
Other species:<br />
Vandenboschia birmanica (Bedd.) Ching; V. cyrtotheca (Hillebr.) Copel.; V. davallioides (Gaudich.)<br />
Copel.; V. johnstonensis (F.M. Bailey) Copel.; V. liukiuensis (Y. Yabe) Copel.; V. maxima (Blume)<br />
Copel.; V. radicans (Sw.) Copel.; V. speciosa (Willd.) G. Kunkel; V. subclathrata K. Iwats.<br />
2. Subgenus Lacosteopsis (Prantl) Ebihara & K. Iwats., comb. nov.<br />
Based on Trichomanes L. sect. Lacosteopsis Prantl (1875) 53. — Lacosteopsis (Prantl) Nakaike (1975)<br />
21. — Lectotype: Trichomanes luschnatianum C. Presl (= Vandenboschia rupestris Ebihara &<br />
K. Iwats., comb. nov. [based on Hymenophyllum rupestre Raddi (1825) 67, t. 80]) (selected by<br />
Christensen (1906) XV, as Trichomanes rupestre (Raddi) Bosch).<br />
Rhizomes suberect, or short- to long-creeping, irregularly branching, wiry, densely<br />
covered with brown to bright brown multicellular hairs, or nearly glabrous in climbing<br />
parts, protostele reduced, cortex heterogeneous, roots numerous and robust at the<br />
terrestrial parts. Stipes 1–16 cm long, clustered or irregularly distanced. Blades usually<br />
pinnate, narrowly elliptic to linear-ovate, 50 by 6 cm, venation anadromous, false veinlets<br />
absent, laminae often reduced, regular arrangement of elongated cells observed in<br />
some species, internal cell walls various (thin to thick, straight to coarsely pitted). Sori<br />
paratactic, tubular to campanulate, lips sometimes dilate, receptacles long-exserted.<br />
Distribution — Both New World and Old World tropics (excl. Africa); at least 2<br />
species.<br />
Habitat – Hemi-epiphytic, climbing on tree trunks.<br />
RepResentative species:<br />
Vandenboschia auriculata (Blume) Copel.; V. rupestris (Raddi) Ebihara & K. Iwats.<br />
6. ABRODICTYUM<br />
Abrodictyum C. Presl (1843) 20, t. VII. — Trichomanes L. sect. Abrodictyum (C. Presl) T. Moore<br />
(1857) cx. — Cephalomanes C. Presl subg. Abrodictyum (C. Presl) K. Iwats. (1984) 176. — Habrodictyon<br />
C. Presl ex Bosch (1861a) 321. — Type: Abrodictyum cumingii C. Presl.<br />
Distribution — Throughout the tropics; c. 25 species.<br />
Chromosome base number — x = 33 (a few doubtful records x = 36).<br />
Note — Corresponding to the Pa clade in Ebihara et al. (submitted). Circumscription<br />
of this genus is very similar to Morton’s subgenus Pachychaetum except for the<br />
inclusion of Abrodictyum and the exclusion of Davalliopsis. Dissected fronds consisting<br />
primarily of the axis (lacking laminar cells) is a unique character observed in some<br />
species of this genus, but according to molecular results such fronds evolved several<br />
times in parallel within this genus.
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