Lindsaeaceae

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Lindsaeaceae
Lindsaea linearis 11.JPG
Lindsaea linearis
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Class: Polypodiopsida
Order: Polypodiales
Suborder: Lindsaeineae
Family: Lindsaeaceae
C.Presl ex M.R.Schomb.[1]
Genera

See text.

Lindsaeaceae is a pantropical family of ferns in the order Polypodiales. It contains six or seven genera with about 220 known species,[2] some of which also extend into the more temperate regions of eastern Asia, New Zealand, and South America.[3]

Description[edit]

Characteristics include: Rhizomes short to long creeping; rhizomes with nonclathrate scales or uniseriate hairs; blades 1-3 pinnate or more divided; veins usually free; sori marginal or submarginal; indusia open towards margin, sometimes attached at sides, or sori covered by the reflexed segment margin.[4]

Taxonomy[edit]

For more than a century, these ferns were considered part of the Davalliaceae. Then starting in the mid-twentieth century they began to be transferred to the Dennstaedtiaceae. Molecular data supported the separation of Lindsaeaceae into its own family, which was proposed in 1970.[3] Lindsaeaceae is considered among the most basal of the families in the order Polypodiales. One hypothesis for the relationships within the order is shown in the following cladogram:[5]

Polypodiales
Saccolomatineae

Saccolomataceae

Lindsaeineae

Cystodiaceae

Lonchitidaceae

Lindsaeaceae

remaining Polypodiales

The genus Lonchitis has many morphological characteristics similar to Dennstaedtiaceae, but a few characteristics of the spore are similar to the lindsaeoid genera, and molecular data placed this genus in Lindsaeaceae.[6] It is now placed in the related family Lonchitidaceae.[7]

Genera[edit]

The Pteridophyte Phylogeny Group classification of 2016 (PPG I) recognized seven genera.[5]

Other sources retain Xyropteris in Lindsaea.[8]

Other genera that have been placed in the Lindsaeaceae are:[7]

References[edit]

  1. ^ Lindsaeaceae C. Presl ex M.R. Schomb. Tropicos.org. Missouri Botanical Garden. 01 Feb 2012
  2. ^ Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. Magnolia Press. 261 (3): 201–217. doi:10.11646/phytotaxa.261.3.1.
  3. ^ a b Lehtonen et al.: Phylogenetics and classification of the pantropical fern family Lindsaeaceae in the Botanical Journal of the Linnaen Society 2010
  4. ^ Smith, A. R., K. M. Pryer, et al. (2006). "A classification for extant ferns." Taxon 55(3): 705-731
  5. ^ 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.
  6. ^ Wolf, P. G. (1997). "Evaluation of atpB Nucleotide Sequences for Phylogenetic Studies of Ferns and Other Pteridophytes." American Journal of Botany 84(10): 1429-1440
  7. ^ a b Christenhusz et al. "A linear sequence of extant families and genera of lycophytes and ferns" Phytotaxa 19: 7-54. 18 Feb. 2011
  8. ^ "Xyropteris K.U.Kramer". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-11-17.