Adiantum

This article is about the plant. For the cipher, see Adiantum (cipher).

Adiantum
Western five-fingered fern (Adiantum aleuticum)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Polypodiales
Family: Pteridaceae
Subfamily: Vittarioideae
Genus: Adiantum
L.
Type species
Adiantum capillus-veneris
L.
Species

See text

Synonyms
  • Hewardia Smith 1841 non Hooker 1851

Adiantum (/ˌædiˈæntəm/),[1] the maidenhair fern (not to be confused with the similar-looking maidenhair spleenwort fern), is a genus of about 250 species of ferns in the subfamily Vittarioideae of the family Pteridaceae,[2] though some researchers place it in its own family, Adiantaceae. The genus name comes from Greek, meaning "unwetted", referring to the fronds' ability to shed water without becoming wet.

Description

They are distinctive in appearance, with dark, often black stipes and rachises, and bright green, often delicately cut leaf tissue. The sori are borne submarginally, and are covered by reflexed flaps of leaf tissue which resemble indusia. Dimorphism between sterile and fertile fronds is generally subtle.

They generally prefer humus-rich, moist, well-drained sites, ranging from bottomland soils to vertical rock walls. Many species are especially known for growing on rock walls around waterfalls and water seepage areas.

The highest species diversity is in the Andes. Fairly high diversity also occurs in eastern Asia, with nearly 40 species in China.

Species native to North America include A. pedatum (five-fingered fern) and the closely related A. aleuticum, which are distinctive in having a bifurcating frond that radiates pinnae on one side only. The cosmopolitan A. capillus-veneris (Venus-hair fern) has a native distribution that extends into the eastern continent. A. jordanii (California Maidenhair) is native to the west coast.

There is a rich Adiantum flora in New Zealand with 3 endemic species (A. cunninghamii, A. viridescens and A. fulvum) in a total of 10 recorded species. Many of these are common especially in the west and south of the islands.

Cladistics

Phylogeny of Adiantum[3][4]

section Adiantellum

section

series Pedata

series Adiantum

series Venusta

series Caudata

series Peruviani

series Tetraphylli

Adiantum

List of species

Cultivation

Many species are grown in the horticultural trade. There are a number of tropical species, including A. raddianum and A. peruvianum. Both A. pedatum and A. aleuticum are hardy to zone 3, and are by far the most cold-hardy members of the genus. A. venustum is also cold-hardy to zone 5. A. capillus-veneris is hardy to zone 7. Hybrids, such as Adiantum × mairisii, are also popular.

  • Rough Maidenhair Fern (Adiantum hispidulum)
    Rough Maidenhair Fern (Adiantum hispidulum)
  • Adiantum cunninghamii showing characteristic inrolled leaf margin containing sori
    Adiantum cunninghamii showing characteristic inrolled leaf margin containing sori
  • Adiantum lunulatum in Goa, India.
    Adiantum lunulatum in Goa, India.
  • Delta Maidenhair (Adiantum raddianum)
    Delta Maidenhair (Adiantum raddianum)

References

  1. ^ Sunset Western Garden Book, 1995:606–607
  2. ^ Christenhusz, Maarten J. M.; Zhang, Xian-Chun; Schneider, Harald (18 February 2011). "A linear sequence of extant families and genera of lycophytes and ferns" (PDF). Phytotaxa. 19: 7–54. doi:10.11646/phytotaxa.19.1.2. ISSN 1179-3163.
  3. ^ Nitta, Joel H.; Schuettpelz, Eric; Ramírez-Barahona, Santiago; Iwasaki, Wataru; et al. (2022). "An Open and Continuously Updated Fern Tree of Life". Frontiers in Plant Science. 13: 909768. doi:10.3389/fpls.2022.909768. PMC 9449725. PMID 36092417.
  4. ^ "Tree viewer: interactive visualization of FTOL". FTOL v1.5.0 [GenBank release 256]. 2023. Retrieved 17 August 2023.
  5. ^ English Names for Korean Native Plants (PDF). Pocheon: Korea National Arboretum. 2015. p. 341. ISBN 978-89-97450-98-5. Archived from the original (PDF) on 25 May 2017. Retrieved 16 December 2016 – via Korea Forest Service.

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