dcsimg

Description

provided by Flora of Zimbabwe
Epiphytic, lithophytic or terrestrial plants. Rhizome creeping, suberect or erect, short or long, often stoloniferous. Stipe not articulated to the rhizome. Fronds monomorphic, widely spaced or tufted. Lamina simple or variously pinnately dissected, with or without a proliferous bud at or near the lamina apex; veins free or anastomosing at the margins. Sori linear (in ours), elongated and dorsally along a vein or shortened and near marginal; indusium narrow or obsolete.
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Mark Hyde, Bart Wursten and Petra Ballings
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Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Aspleniaceae Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/family.php?family_id=25
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Mark Hyde
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Bart Wursten
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Petra Ballings
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Flora of Zimbabwe

Aspleniaceae

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The Aspleniaceae (spleenworts) is a family of ferns, included in the order Polypodiales[1] or in some classifications as the only family in the order Aspleniales.

Members of the family all have intramarginal, linear sori with a flap-like indusium arising along one edge. Most pteridologists today consider this family of consisting of just two genera. Others still maintain segregate genera such as Phyllitis and Ceterach; however, the species segregated into these genera all hybridize readily with undisputed Asplenium species.[specify] A recent phylogenenetic study of Aspleniaceae (Murukami et al. 1999) shows that species segregated as Camptosorus and Neottopteris are nested within Asplenium and recommends that they be included in that genus, but suggests that Hymenasplenium (including Boniniella) and Phyllitis are distantly related to other Asplenium species and should be recognized at the generic level.

The genus Diellia, consisting of six species found only in Hawaii, was long considered to be independent, but now has been shown to nest within Asplenium.[2]

The Aspleniaceae includes the two genera:[3]

The genus Hemidictyum (formerly also placed in the Woodsiaceae) has been shown to be a phylogenic sister to Aspleniaceae,[4] and therefore considered for membership in this family, but has instead been moved to its own family Hemidictyaceae.[5]

Phylogenic relationships

The following diagram for the eupolypods II, based on Lehtonen, 2011,[4] and Rothfels & al., 2012,[6] shows a likely phylogenic relationship between the Aspleniaceae and the other families of the eupolypods II clade. .mw-parser-output table.clade{border-spacing:0;margin:0;font-size:100%;line-height:100%;border-collapse:separate;width:auto}.mw-parser-output table.clade table.clade{width:100%}.mw-parser-output table.clade td{border:0;padding:0;vertical-align:middle;text-align:center}.mw-parser-output table.clade td.clade-label{width:0.8em;border:0;padding:0 0.2em;vertical-align:bottom;text-align:center}.mw-parser-output table.clade td.clade-slabel{border:0;padding:0 0.2em;vertical-align:top;text-align:center}.mw-parser-output table.clade td.clade-bar{vertical-align:middle;text-align:left;padding:0 0.5em}.mw-parser-output table.clade td.clade-leaf{border:0;padding:0;text-align:left;vertical-align:middle}.mw-parser-output table.clade td.clade-leafR{border:0;padding:0;text-align:right}

eupolypods II

Cystopteridaceae

       

Rhachidosoraceae

     

Diplaziopsidaceae

     

Aspleniaceae

   

Hemidictyaceae

           

Thelypteridaceae

     

Woodsiaceae

       

Onocleaceae

   

Blechnaceae

     

Athyriaceae

           

In the classification of Christenhusz & Chase (2014), Aspleniaceae is one of eight families in the order Polypodiales. Polypodiales being one of 7 orders of subclass Polypodiidae. They place Polypodiidae and three other subclasses in the Polypodiophyta or ferns. The older division of Pteridophyta no longer being accepted, because it is paraphyletic.[7]

Subdivision

Christenhusz & Chase (2014) recommended the transfer of all eupolypods I to Polypodiaceae and all eupolypods II to Aspleniaceae, with previous families becoming subfamilies.[7] Accepting their reclassification, the corresponding cladogram for the subfamilies of Aspleniaceae is:

Aspleniaceae

Cystopteridoideae (Acystopteris, Cystoathyrium, Cystopteris, Gymnocarpium)

       

Rhachidosoroideae (Rhachidosorus)

     

Diplaziopsidoideae (Diplaziopsis, Homalosorus)

   

Asplenioideae (Asplenium, Hemidictyum, Hymenasplenium)

         

Thelypteridoideae (Macrothelypteris, Phegopteris, Thelypteris)

     

Woodsioideae (Woodsia)

     

Blechnoideae (Blechnum, Onoclea, Stenochlaena, Woodwardia)

   

Athyrioideae (Athyrium, Cornopteris, Deparia, Diplazium)

           

References

  1. ^ Alan R. Smith; Kathleen M. Pryer; Eric Schuettpelz; Petra Korall; Harald Schneider; Paul G. Wolf (2006). "A classification for extant ferns" (PDF). Taxon. 55 (3): 705–731. doi:10.2307/25065646. Archived from the original (PDF) on 2008-02-26..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""'"'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
  2. ^ Schneider H; et al. (2005-02-22), "Origin of the endemic fern genus Diellia coincides with the renewal of Hawaiian terrestrial life in the Miocene", Proc Biol Sci, 272 (1561): 455–60, doi:10.1098/rspb.2004.2965, PMC 1634989, PMID 15734701
  3. ^ Maarten J. M. Christenhusz, Xian-Chun Zhang & Harald Schneider (2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54.
  4. ^ a b Samuli Lehtonen (2011). "Towards Resolving the Complete Fern Tree of Life" (PDF). PLoS ONE. 6 (10): e24851. doi:10.1371/journal.pone.0024851. PMC 3192703. PMID 22022365.
  5. ^ Maarten J. M. Christenhusz & Harald Schneider (2011). "Corrections to Phytotaxa 19: Linear sequence of lycophytes and ferns" (PDF). Phytotaxa. 28: 50–52. doi:10.11646/phytotaxa.28.1.6.
  6. ^ Carl J. Rothfels; Anders Larsson; Li-Yaung Kuo; Petra Korall; Wen- Liang Chiou; Kathleen M. Pryer (2012). "Overcoming Deep Roots, Fast Rates, and Short Internodes to Resolve the Ancient Rapid Radiation of Eupolypod II Ferns". Systematic Biology. 61 (1): 70. doi:10.1093/sysbio/sys001. PMID 22223449.
  7. ^ a b Christenhusz, Maarten J.M. & Chase, Mark W. (2014). "Trends and concepts in fern classification". Annals of Botany. 113 (9): 571–594. doi:10.1093/aob/mct299. PMC 3936591. PMID 24532607.

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Aspleniaceae: Brief Summary

provided by wikipedia EN

The Aspleniaceae (spleenworts) is a family of ferns, included in the order Polypodiales or in some classifications as the only family in the order Aspleniales.

Members of the family all have intramarginal, linear sori with a flap-like indusium arising along one edge. Most pteridologists today consider this family of consisting of just two genera. Others still maintain segregate genera such as Phyllitis and Ceterach; however, the species segregated into these genera all hybridize readily with undisputed Asplenium species.[specify] A recent phylogenenetic study of Aspleniaceae (Murukami et al. 1999) shows that species segregated as Camptosorus and Neottopteris are nested within Asplenium and recommends that they be included in that genus, but suggests that Hymenasplenium (including Boniniella) and Phyllitis are distantly related to other Asplenium species and should be recognized at the generic level.

The genus Diellia, consisting of six species found only in Hawaii, was long considered to be independent, but now has been shown to nest within Asplenium.

The Aspleniaceae includes the two genera:

Asplenium L. 1753  Hymenasplenium Hayata 1927 

The genus Hemidictyum (formerly also placed in the Woodsiaceae) has been shown to be a phylogenic sister to Aspleniaceae, and therefore considered for membership in this family, but has instead been moved to its own family Hemidictyaceae.

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wikipedia EN