Hymenophyllaceae

From Palaeos

Hymenophyllaceae are the "filmy ferns", a distinctive family of small ferns with extremely thin, translucent leaves.

Taxonomy of the filmy ferns can be a confusing affair, varying from authors who divide them into a large number of genera to those who would only recognise two, Trichomanes and Hymenophyllum. The tree below follows that of Pryer et al. (2001).

<==Hymenophyllaceae [Hymenophylloideae]
   |  i. s.: Callistopteris
   |         Hymenoglossum cruentum
   |         Rosenstockia rolandi-principis
   |--Trichomanes [incl. Cephalomanes, Crepidomanes, Trichomanes subg. Pachychaetum]
   |    |  i. s.: T. bimarginatum
   |    |         ‘Crepidomanes’ birmanicum
   |    |         T. hymenoides
   |    |         T. intricatum
   |    |         ‘Cephalomanes’ obscurum
   |    |         T. robinsonii
   |    |         T. scandens
   |    |--+--+--T. (sect. Cephalomanes) javanicum [=Cephalomanes javanicum]
   |    |  |  `--T. (sect. Pachychaetum) tamarisciforme (see below for synonymy)
   |    |  `--T. subg. Achomanes
   |    |       |--+--T. (sect. Acarpacrium) alatum
   |    |       |  `--T. (sect. Neurophyllum) pinnatum
   |    |       `--+--T. (sect. Davalliopsis) elegans (see below for synonymy)
   |    |          `--T. (sect. Feea) osmundoides [=Feea osmundoides]
   |    `--+--T. subg. Didymoglossum
   |       |    |--T. (sect. Microgonium) ekmanii [=Microgonium ekmanii]
   |       |    `--+--T. (sect. Lecanium) membranaceum [=Lecanium membranaceum]
   |       |       `--T. (sect. Didymoglossum) pinnatinervium [=Didymoglossum pinnatinervium]
   |       `--T. subg. Trichomanes [incl. Crepidomanes subg. Maiora]
   |            |  i. s.: *T. crispum
   |            |         T. auriculatum Blume 1828 (see below for synonymy)
   |            |         T. schmidtianum Zenker ex Taschn. 1843 (see below for synonymy)
   |            |--T. sect. Lacosteopsis Morton 1968
   |            |    |--T. (sect. *L.) radicans Sw. 1801 (see below for synonymy)
   |            |    |    |--T. r. var. radicans
   |            |    |    `--‘Crepidomanes’ r. var. naseanum (Christ) Iwats. 1985 (see below for synonymy)
   |            |    `--T. speciosum (see below for synonymy)
   |            `--+--T. (sect. Nesopteris) thysanostomum (see below for synonymy)
   |               `--+--T. sect. Crepidomanes [=Crepidomanes subg. Crepidomanes]
   |                  |    |--T. bipunctatum (see below for synonymy)
   |                  |    `--‘Didymoglossum’ latealatum v. d. B. 1863 (see below for synonymy)
   |                  `--T. (sect. Gonocormus) minutum Blume 1828 (see below for synonymy)
   `--+--Cardiomanes [Cardiomanoideae]
      |    `--C. reniforme [=Trichomanes reniforme]
      `--Hymenophyllum

‘Crepidomanes’ radicans var. naseanum (Christ) Iwats. 1985 [=Trichomanes naseanum Christ 1905]

‘Didymoglossum’ latealatum v. d. B. 1863 [=Crepidomanes latealatum (v. d. B.) Copel. 1938; incl. Trichomanes filicula, D. insigne v. d. B. 1863, Crepidomanes insigne (v. d. B.) Fu 1957, Trichomanes bipunctatum var. insigne (v. d. B.) Bedd. 1883, T. insigne (v. d. B.) Bedd. 1868]

Trichomanes auriculatum Blume 1828 [=Crepidomanes auriculatum (Blume) Iwats. 1985, Vandenboschia auriculata (Blume) Copel. 1938]

Trichomanes bipunctatum [=Crepidomanes (subg. Crepidomanes sect. Taschneria) bipunctatum]

Trichomanes (sect. Davalliopsis) elegans [=Cephalomanes elegans, Davalliopsis elegans]

Trichomanes (sect. Gonocormus) minutum Blume 1828 [=Crepidomanes minutum (Blume) Iwats. 1985, Gonocormus minutus (Blume) v. d. B. 1861; incl. T. diffusum Blume 1828, G. diffusus (Blume) v. d. B. 1861, T. proliferum Blume 1828, T. saxifragoides Presl 1843]

Trichomanes radicans Sw. 1801 [=Crepidomanes radicans, Vandenboschia radicans (Sw.) Copel. 1938]

Trichomanes schmidtianum Zenker ex Taschn. 1843 [=Crepidomanes schmidtianum (Zenker) Iwats. 1985; incl. T. latifrons v. d. B. 1863, Vandenboschia titibuensis Ito 1949]

Trichomanes speciosum [=Crepidomanes speciosum, T. radicans var. speciosum, Vandenboschia speciosa]

Trichomanes (sect. Pachychaetum) tamarisciforme [=Cephalomanes tamarisciformis, Macroglena tamarisciformis]

Trichomanes (sect. Nesopteris) thysanostomum [=Cephalomanes thysanostomum, Nesopteris thysanostomum]

* Type species of genus indicated

References

Iwatsuki, K. 1988. An enumeration of the pteridophytes of Nepal. In The Himalayan Plants vol. 1 (H. Ohba & S. B. Malla, eds.) The University Museum, University of Tokyo, Bulletin 31: 231-339.

Lindsay, S. 2003. Considerations for a revision of the fern family Vittariaceae for Flora Malesiana. Telopea 10 (1): 99-112.

Lötschert, W. 1954. Beitrag zur Pteridophyten-Flora von Mittel-Amerika. Senckenbergiana Biologica 35 (1-2): 109-119.

Pryer, K. M., A. R. Smith, J. S. Hunt & J. Y. Dubuisson. 2001. rbcL data reveal two monophyletic groups of filmy ferns (Filicopsida: Hymenophyllaceae). American Journal of Botany 88 (6): 1118-1130.

Yatskievych, G., & A. R. Smith. 2003. Typification of Notholaena R. Br. (Pteridaceae). Taxon 52: 331-336.

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