Biology:Myriopteris intertexta

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Short description: Species of fern

Myriopteris intertexta
Coastal lipfern, Myriopteris intertexta, White Mtns CA.JPG
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Family: Pteridaceae
Subfamily: Cheilanthoideae
Genus: Myriopteris
Species:
M. intertexta
Binomial name
Myriopteris intertexta
(Maxon) Grusz & Windham
Synonyms
  • Cheilanthes covillei Maxon subsp. intertexta Maxon
  • Cheilanthes intertexta (Maxon) Maxon
  • Hemionitis intertexta (Maxon) Christenh.

Myriopteris intertexta, formerly Cheilanthes intertexta,[1][2] is a species of lip fern known by the common name coastal lip fern. It is native to montane California and western Nevada, Oregon east of the Cascades, and with a disjunct population in central Utah. It grows in dry rocky habitats in sun, typically in rock cracks with little or no soil.

Description

This fern produces clusters of dark green leaves up to about 25 centimeters long. Each leaf is divided into bumpy segments which are subdivided into pairs of rounded beadlike ultimate segments with their edges curled under to make them concave underneath. Each ultimate segment is less than 3 millimeters wide, sparsely hairy on top and scaly on the underside. Its sori are mostly hidden under the scales and curled leaflet margin (false indusium). The long-lanceolate scales on the underside of the leaflets are approximately 1 mm wide at their base, intermediate between those of its two parents (M. gracillima scales are very narrow (hair like) and those of M. covillei are 2–3 mm wide). The leaves arise from a short creeping rhizome, such that plants often have an elongated base, for example creeping along a rock crevice.[2]

Myriopteris intertexta lower leaf surface. Photograph by Timothy McNitt.

Range

M. intertexta is found in Oregon, California, and eastern Nevada. In addition, there is an apparently disjunct population in north-central Utah on Mount Olympus in the Wasatch Range. The range of M. intertexta is intermediate between that of its two parents M. gracillima (with a range that extends further north) and M. covillei (with a range that extends further south and east into southern California, Arizona, and the Baja California peninsula and central Mexico).[2][3][4]

Taxonomy

This fern is thought to be an allotetraploid fertile hybrid of Myriopteris gracillima (maternal) and Myriopteris covillei (paternal).[2][5][6][1][7]

References

  1. 1.0 1.1 Grusz & Windham 2013.
  2. 2.0 2.1 2.2 2.3 Jepson: Myriopteris intertexta
  3. Jepson: Myriopteris gracillima
  4. Jepson: Myriopteris covillei
  5. Windham & Rabe 1993.
  6. Grusz, A. L., M. D. Windham, and K. M. Pryer. 2009. Deciphering the origins of apomictic polyploids in the Cheilanthes yavapensis complex (Pteridaceae). American Journal of Botany 96: 1636–1645
  7. Grusz et al. 2014.

Works cited

External links

Wikidata ☰ Q17196435 entry