dcsimg

Description

provided by Flora of Zimbabwe
Rhizome creeping; scales peltate. Fronds tufted or spaced, simple to deeply pinnatifid, margins entire, glabrous, coriaceous, subsessile or stipidate, usually articulated. Veins reticulate, all areoles with included veinlets, ending or not ending in hydathodes. Sori round, aligned in rows on each side of the midrib or irregurlarly distributed, superficial or sunken, with or without paraphyses.
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Mark Hyde, Bart Wursten and Petra Ballings
bibliographic citation
Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2014). Microsorum Flora of Zimbabwe website. Accessed 28 August 2014 at http://www.zimbabweflora.co.zw/speciesdata/genus.php?genus_id=46
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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

Microsorum

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Microsorum is a genus of ferns in the family Polypodiaceae, subfamily Microsoroideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I).[3] The species are tropical. Like most ferns, they grow from rhizomes, rather than roots. The genus name is often misspelled "Microsorium" or "Microsoreum". It includes some species that are lithophytic rheophytes.

Taxonomy

The genus Phymatosorus is included in Microsorum in the Pteridophyte Phylogeny Group classification of 2016 (PPG I).[3] As of February 2019, both the Checklist of Ferns and Lycophytes of the World and Plants of the World Online kept Phymatosorus separate.[4][5] A 2019 molecular phylogenetic study of the subfamily Microsoroideae did not distinguish Phymatosorus from Microsorum, and suggested that the genus as there circumscribed was sister to Leptochilus, together forming one of the three main clades in the subfamily:[6]

Microsoroideae

Lepisorus s.l. (7 genera in the PPG I system)

Microsorum

Leptochilus

lecanopteroid genera (4 genera)

Goniophlebium

Species

As of February 2020, the Checklist of Ferns and Lycophytes of the World recognized the following species, either in Microsorum or in Phymatosorus with a synonym in Microsorum (marked "[P]" in the list).[7][4]

Species placed elsewhere by the Checklist of Ferns and Lycophytes of the World include:

References

  1. ^ Microsorum Link Tropicos.org. Missouri Botanical Garden. 15 Jan 2012
  2. ^ Synonyms Tropicos.org. Missouri Botanical Garden. 15 Jan 2012
  3. ^ a b PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi:10.1111/jse.12229. S2CID 39980610.
  4. ^ a b Hassler, Michael & Schmitt, Bernd (January 2020). "Phymatosorus". Checklist of Ferns and Lycophytes of the World. Version 8.20. Retrieved 2020-02-11.
  5. ^ "Phymatosorus Pic.Serm". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2020-02-11.
  6. ^ Testo, Weston L.; Field, Ashley R.; Sessa, Emily B. & Sundue, Michael (2019), "Phylogenetic and Morphological Analyses Support the Resurrection of Dendroconche and the Recognition of Two New Genera in Polypodiaceae Subfamily Microsoroideae" (PDF), Systematic Botany, 44 (4): 737–752, doi:10.1600/036364419X15650157948607, S2CID 208176686, retrieved 2020-02-11
  7. ^ Hassler, Michael & Schmitt, Bernd (January 2020). "Microsorum". Checklist of Ferns and Lycophytes of the World. Version 8.20. Retrieved 2020-02-11.
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Microsorum: Brief Summary

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Microsorum is a genus of ferns in the family Polypodiaceae, subfamily Microsoroideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). The species are tropical. Like most ferns, they grow from rhizomes, rather than roots. The genus name is often misspelled "Microsorium" or "Microsoreum". It includes some species that are lithophytic rheophytes.

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