Myriopteris yatskievychiana

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Myriopteris yatskievychiana
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Family: Pteridaceae
Genus: Myriopteris
Species:
M. yatskievychiana
Binomial name
Myriopteris yatskievychiana
(Mickel) Grusz & Windham
Synonyms
  • Cheilanthes yatskievychianaMickel

Myriopteris yatskievychiana is a small fern native to Mexico, a member of the family Pteridaceae. It is known only from a single collection in the Mexican state of Sonora. While superficially similar to golden lip fern, a widespread species in Mexico, differences in its coating of hairs and its small size make it distinctive. One of the cheilanthoid ferns, it was usually classified in the genus Cheilanthes until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes.

Contents

Description

The fronds emerge in clumps from the rhizome, which is 1 millimeter (0.04 in) in diameter, 4 millimeters (0.2 in) if scales and leaf bases are included. The rhizome bears linear to narrowly lanceolate scales, about 3 millimeters (0.1 in) long and not toothed at the edges. They are dull and uniformly pale brown in color. [1]

The fronds are 10 to 15 centimeters (3.9 to 5.9 in) long and 6 to 8 millimeters (0.2 to 0.3 in) wide. The stipe (the stalk of the leaf, below the blade) is one-quarter to one-third of the total leaf length, dark reddish-brown with color and darkening to black with age. The stipe is rounded and about 0.6 mm in diameter. It has a dense coating of lax, jointed hairs up to 1 millimeter (0.04 in) long, which fall off with age. [1]

The leaf blades are linear in shape. They bear 16 to 22 pairs of shallowly-lobed, oblong pinnae. The pinnae are borne on jointed stalks about 1 millimeter (0.04 in) long. Both upper and lower surfaces of the leaf blade are densely covered with straight white hairs, obscuring the tissue of the leaf. [1]

On fertile fronds, the sori are protected by false indusia formed by the edge of the leaf curling back over the underside. The false indusia are not differentiated from the rest of the leaf tissue, and are only slightly curved back. The sori are concentrated at vein ends and contain tan spores. [1]

Myriopteris yatskievychiana closely resembles Myriopteris aurea , the golden lip fern, in general appearance, but the latter is much larger, with fronds up to 75 centimeters (30 in) long, and bears rusty, tangled hairs on the underside of the leaf, and curved, glandular hairs on the stipe and rachis. [2]

Taxonomy

Myriopteris yatskievychiana was first described by John Mickel in 2004, as Cheilanthes yatskievychiana, based on material collected by Alberto Búrquez in 1996 from San Javier Municipality, Sonora. It was named in honor of pteridologist George Yatskievych, who noticed the unusual characteristics of the specimen. [1]

The development of molecular phylogenetic methods showed that the traditional circumscription of Cheilanthes is polyphyletic. Convergent evolution in arid environments is thought to be responsible for widespread homoplasy in the morphological characters traditionally used to classify it and the segregate genera that have sometimes been recognized. On the basis of molecular evidence, Amanda Grusz and Michael D. Windham revived the genus Myriopteris in 2013 for a group of species formerly placed in Cheilanthes. One of these was C. yatskievychiana, which thus became Myriopteris yatskievychiana. [3] Further molecular studies in Myriopteris demonstrated the existence of three well-supported clades within the genus. M. yatskievychiana belongs to what Grusz et al. informally named the covillei clade. M. yatskievychiana and the similar M. aurea are sister to the rest of the clade; all other members of the clade, except M. newberryi, belong to the "core covillei" clade, with leaves finely divided into bead-like segments, quite dissimilar to M. yatskievychiana. [4]

Distribution and habitat

Myriopteris yatskievychiana is known only from the type specimen. It was collected in Platanus forest in a deep canyon in Sonora. [2]

Notes and references

Related Research Articles

<i>Myriopteris covillei</i> Species of fern

Myriopteris covillei, formerly known as Cheilanthes covillei, is a species of cheilanthoid fern known by the common name Coville's lip fern. Coville's lip fern is native to the southwestern United States and Mexico.

<i>Myriopteris parryi</i> Species of fern

Myriopteris parryi, formerly known as Cheilanthes parryi, is a species of lip fern known by the common name Parry's lip fern.

<i>Myriopteris clevelandii</i> Species of fern

Myriopteris clevelandii, formerly known as Cheilanthes clevelandii, is a species of lip fern known by the common name Cleveland's lip fern. It is native to southern California and Baja California in Mexico. The leaf is divided into small, bead-like segments densely covered with scales beneath. In M. clevelandii, some of these scales are reduced to hairlike structures, which help distinguish it from the closely related M. covillei. It is usually found growing on exposed rock, particularly igneous rock.

<i>Myriopteris cooperae</i> Species of fern

Myriopteris cooperae, formerly Cheilanthes cooperae, is a species of lip fern known by the common name Mrs. Cooper's lip fern, or simply Cooper's lip fern.

<i>Myriopteris gracillima</i> Species of fern

Myriopteris gracillima, formerly known as Cheilanthes gracillima, is a species of lip fern known by the common name lace lip fern. It is native to western North America, where it grows in rocky habitat from British Columbia to California to Montana.

<i>Myriopteris intertexta</i> Species of fern

Myriopteris intertexta, formerly Cheilanthes intertexta, 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.

<i>Myriopteris newberryi</i> Species of fern

Myriopteris newberryi, formerly Cheilanthes newberryi, is a species of lip fern known by the common name Newberry's lip fern. It is native to southern California and Baja California.

<i>Myriopteris tomentosa</i> Species of fern

Myriopteris tomentosa, formerly known as Cheilanthes tomentosa, is a perennial fern known as woolly lipfern. Woolly lipfern is native to the southern United States, from Virginia to Arizona and Georgia, and Mexico.

<i>Myriopteris lanosa</i> Species of fern

Myriopteris lanosa, the hairy lip fern, is a moderately-sized fern of the eastern United States, a member of the family Pteridaceae. Its leaves and stem are sparsely covered in hairs, but lack scales, hence its common name. One of the cheilanthoid ferns, it was usually classified in the genus Cheilanthes until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes. It typically grows in shallow, dry, soil, often in rocky habitats.

<i>Myriopteris</i> Genus of ferns

Myriopteris, commonly known as the lip ferns, is a genus of cheilanthoid ferns. Like other cheilanthoids, they are ferns of dry habitats, reproducing both sexually and apogamously. Many species have leaves divided into a large number of small, bead-like segments, the probable inspiration for the generic name. Hairs and/or scales are often present on both the upper and lower surfaces of the leaf, and their presence and appearance are useful in distinguishing between species. The genus is most diverse in Mexico, but species are found from southwestern Canada south to southern Chile, and one species is endemic to southern Africa.

<i>Myriopteris alabamensis</i> Species of fern

Myriopteris alabamensis, the Alabama lip fern, is a moderately-sized fern of the United States and Mexico, a member of the family Pteridaceae. Unlike many members of its genus, its leaves have a few hairs on upper and lower surfaces, or lack them entirely. One of the cheilanthoid ferns, it was usually classified in the genus Cheilanthes as Cheilanthes alabamensis until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes. It typically grows in shade on limestone outcrops.

Myriopteris maxoniana is a species of cheilanthoid fern known only from one collection in Tamaulipas, Mexico. It closely resembles Myriopteris longipila and was not described as a distinct taxon until 2004.

Myriopteris aemula, the Texas lip fern or rival lip fern, is a moderately-sized fern of Texas and Mexico, a member of the family Pteridaceae. Unlike many members of its genus, its leaves have a few hairs on upper and lower surfaces, or lack them entirely. One of the cheilanthoid ferns, it was usually classified in the genus Cheilanthes as Cheilanthes aemula until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes. It typically grows on limestone rock.

Myriopteris allosuroides is a moderately-sized fern of Mexico, a member of the family Pteridaceae. Unlike many members of its genus, its rachides are grooved on the upper surface and largely free of hairs or scales. One of the cheilanthoid ferns, it was usually classified in the genera Cheilanthes or Pellaea until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes. It typically grows on dry, rocky slopes over acidic, particularly basaltic, rock.

<i>Myriopteris aurea</i> Species of fern

Myriopteris aurea, the golden lip fern or Bonaire lip fern, is a moderately-sized fern native to the Americas, a member of the family Pteridaceae. Unlike many members of its genus, its leaf is only modestly dissected into lobed leaflets (pinnae), which are hairy both above and below. One of the cheilanthoid ferns, until 2013 it was classified in the genus Cheilanthes as Cheilanthes bonariensis, when the genus Myriopteris was again recognized as separate from Cheilanthes. It typically grows on dry, rocky slopes, and ranges from Mexico, where it is common and widespread, and the southwestern United States south and east through Central and South America as far as Chile and Argentina.

<i>Myriopteris rufa</i> Species of fern

Myriopteris rufa, commonly known as Eaton's lip fern, is a moderately-sized fern of Mexico and the southwestern United States, with outlying populations in Costa Rica and the Appalachian Mountains. One of the cheilanthoid ferns, it was usually classified in the genus Cheilanthes, as Cheilanthes eatonii, until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes. It typically grows in rocky habitats, most frequently on limestone but also sometimes on basalt or shale.

Myriopteris longipila, formerly known as Cheilanthes longipila, is a species of fern native to Mexico. It is characterized by a dense covering of long whitish hairs.

<i>Myriopteris rawsonii</i> Species of fern

Myriopteris rawsonii, formerly known as Cheilanthes rawsonii, is a perennial fern native to Namaqualand in Southern Africa. Like many other cheilanthoid ferns, it is adapted to dry conditions, bearing a thick layer of pale hairs on the underside of its pinnate-pinnatifid leaves. It is the only African representative of its clade of cheilanthoids, the otherwise American genus Myriopteris. It spends much of the year in a dried-out, dormant state, rehydrating and putting out new growth during winter rains. Its name honors the botanist and civil servant Sir Rawson W. Rawson.

<i>Myriopteris wootonii</i> Species of fern

Myriopteris wootonii, formerly known as Cheilanthes wootonii, is a species of fern in the Pteridaceae family with the common name Wooton's lace fern.

Myriopteris chipinquensis is a fern endemic to Mexico, a member of the family Pteridaceae. One of the cheilanthoid ferns, it was classified in the genus Cheilanthes until 2013, when the genus Myriopteris was again recognized as separate from Cheilanthes. It grows in oak-pine forests of the Sierra Madre Oriental, often with the very similar and closely related Myriopteris tomentosa.

References

Works cited

  • Grusz, Amanda L.; Windham, Michael D. (2013). "Toward a monophyletic Cheilanthes: The resurrection and recircumscription of Myriopteris (Pteridaceae)". PhytoKeys (32): 49–64. doi: 10.3897/phytokeys.32.6733 . PMC   3881352 . PMID   24399906.
  • Grusz, Amanda L.; Windham, Michael D.; Yatskievych, George; Huiet, Lane; Gastony, Gerald J.; Pryer, Kathleen M. (2014). "Patterns of Diversification in the Xeric-adapted Fern Genus Myriopteris (Pteridaceae)". Systematic Botany. 39 (3): 698–714. doi:10.1600/036364414X681518. JSTOR   24546228.
  • Mickel, John T.; Smith, Alan R. (2004). The Pteridophytes of Mexico. Memoirs of the New York Botanical Garden. Vol. 88. Bronx, New York: New York Botanical Garden. ISBN   978-0-89327-488-7.