A TAXONOMIC REVISION OF HYMENOPHYLLACEAE

A. Ebihara et al.: A taxonomic revision of Hymenophyllaceae
contrast to its long-term acceptance in New World floras, Morton’s subgenus Achomanes
shared few morphological characters other than geographical distribution and chromosome
base number. Recent inclusion of Davalliopsis in this group (Dubuisson et al.,
2003a; Ebihara et al, submitted) made it even more difficult to define morphologically.
We therefore recognize four subgenera under this genus, which are easily definable.
Monophyly of subgenus Davalliopsis and subg. Lacostea is clearly shown by our molecular
analysis (as the Da subclade), but they are very different in most morphological
features.
KEY TO THE SUBGENERA
1a. Lamina texture membranous, one cell thick . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
b. Lamina texture tough, more than one cell thick . . . . . . . . . . . . . . . . . . . . . . . . . 5
2a. Rhizomes short-creeping or erect . . . . . . . . . . . . . . . . . . . 1. Subg. Trichomanes
b. Rhizomes long-creeping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3a. Blades tripinnate or more finely divided . . . . . . . . . . . . . . 1. Subg. Trichomanes
b. Blades once-pinnate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4a. Margins of blades hairy . . . . . . . . . . . . . . . . . . . . . . . . . . . 1. Subg. Trichomanes
b. Margins of blades glabrous . . . . . . . . . . . . . . . . . . . . . . . . . . . 4. Subg. Lacostea
5a. Venation catadromous in sterile blades . . . . . . . . . . . . . . . . . . . . . . 2. Subg. Feea
b. Venation anadromous in sterile blades . . . . . . . . . . . . . . . . 3. Subg. Davalliopsis
1. Subgenus Trichomanes
Trichomanes L. subg. Eutrichomanes C. Presl (1843) 16. — Trichomanes L. sect. Eutrichomanes
(C. Presl) T. Moore (1857) cx. — Lectotype: Trichomanes scandens L. (selected by Morton (1968)
180; his idea that this and several subsequent synonyms include the type species of Trichomanes
led him to designate T. scandens as lectotypes for these taxa. Although T. crispum has recently
been fixed to the type of the genus as noted above, Morton’s lectotypifications do not need to be
changed since they were validly published).
Trichomanes L. sect. Pinnata C. Presl (1843) 16. — Lectotype: Trichomanes scandens L. (selected
by Morton (1968) 180).
Ragatelus C. Presl (1843) 16. — Trichomanes L. sect. Ragatelus (C. Presl) C. Chr. (1906) XIV.
— Type: Ragatelus crinitus (Sw.) C. Presl (= Trichomanes crinitum Sw.).
Homoeotes C. Presl (1848) 331. — Ptilophyllum Bosch sect. Homoeotes (C. Presl) Prantl (1875) 48.
— Trichomanes L. sect. Homoeotes (C. Presl) C. Chr. (1906) XIV. — Type: Homoeotes heterophylla
(Willd.) C. Presl (= Trichomanes humboldtii (Bosch) Lellinger).
Trichomanes L. subg. Pseudoachomanes C. Presl (1849) 16. — Trichomanes L. sect. Pseudoachomanes
(C. Presl) C. Chr. (1906) XIV. — Lectotype: Trichomanes sinuosum Rich. ex Willd.
(= Trichomanes polypodioides L.) (selected by Christensen (1906) XIV, as T. polypodioides L.).
Odontomanes C. Presl (1849) 20. — Trichomanes L. sect. Odontomanes (C. Presl) C. Chr. (1906)
XIV. — Type: Odontomanes hostmannianum (Klotzsch) C. Presl (= Trichomanes hostmannianum
(Klotzsch) Kunze).
Trichomanes L. sect. Neurophyllum T. Moore (1857) cx, based on Neurophyllum C. Presl (1843)
18, t. IV, f. C, nom. illeg., non Torr. & A. Gray. (1840) 612. — Neuromanes Trevis. ex Bosch
(1859) 347. — Type: Neurophyllum pinnatum (Hedw.) C. Presl (= Trichomanes pinnatum Hedw.)
(selected by Christensen (1906) XIV).
Ptilophyllum Bosch subsect. Sinuosa Prantl (1875) 47. — Lectotype: Ptilophyllum sinuosum (Rich.
ex Willd.) Prantl (= Trichomanes polypodioides L.) (selected by Morton (1968) 198).
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