Adiantum obliquum

• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• More Info
• Further Reading
• Notes

Common Names

Description

Genus Adiantum

Plants terrestrial or on rock. Stems short- to long-creeping or suberect, branched; scales deep tawny yellow to dark reddish brown [black], concolored or bicolored , linear-lanceolate to lanceolate, margins entire, erose-ciliate, or minutely dentate . Leaves monomorphic to somewhat dimorphic , densely clustered to closely spaced [distant ], 15--110 cm. Petiole chestnut brown to dark purple or blackish, with single groove adaxially, glabrous , hispid , or strigose , with 1 or 2 vascular bundles . Blade lanceolate, ovate , trowel-shaped, or fan-shaped, 1--4(--9) -pinnate proximally, membranaceous to papery , both surfaces commonly glabrous (2 species with scattered hairs ), adaxially dull or shiny, not striate ; rachis straight or flexuous . Ultimate segments subsessile to short-stalked (stalks terminating in cupulelike swelling at base of pinna in A. tenerum ), round, fan-shaped, rhombic , or oblong , 3--29 mm wide; base truncate to cuneate, free from costa; stalk dark, often lustrous ; fertile segments with marginal lobes recurved to form false indusia. Veins of ultimate segments conspicuous , free, ± dichotomously forking near base and well above segment base [anastomosing in a few tropical species], parallel distally. False indusia light gray-green or brown to dark brown, narrow, 0.6--1 mm wide, marginal, concealing sporangia until sporangia dehisce. Sporangia submarginal, borne along or sometimes also between veins on abaxial surface of false indusium, paraphyses and glands absent. Spores yellow or yellowish brown, tetrahedral-globose, trilete, rugulate to rugose or tuberculate , equatorial ridge absent. x = 29, 30.

Species ca. 150--200: nearly worldwide except at latitudes greater than 60°.

Most diverse in Andean South America, Adiantum is primarily a tropical genus; of the nine species occurring in the flora , A. melanoleucum, A. tenerum, and A. tricholepis are strictly subtropical . Adiantum hispidulum occurs only as an escape from cultivation. The genus is absent from dry areas in the interior of the continent.

Adiantum is a very clearly circumscribed genus of ferns, the character state "sporangia borne on abaxial surface of false indusium" being both necessary and sufficient to define it. Within this large and widespread genus, however, species relationships are mostly unknown. An evolutionary classification of the group is indeed much needed (R. M. Tryon and A. F. Tryon 1982).[1]

Physical Description

Habitat

Typically found at an altitude of 0 to 3,028 meters (0 to 9,934 feet).[2]

Biology

Reproduction

Duration: Perennial

Taxonomy

Notes

Name Status: Accepted Name . Latest taxonomic scrutiny: 15-Mar-2000

Similar Species

Members of the genus Adiantum

ZipcodeZoo has pages for 641 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

A. abscissum · A. achilleifolium · A. acinaciforme · A. acrocarpon · A. aculeatum · A. aculeolatum · A. acuminatum · A. adiantoides · A. aemulum · A. aethiopicum (Common Maidenhair Fern) · A. aethiopicum var. nodosa · A. aetiopi · A. affine · A. africanum · A. alarconianum · A. alatum · A. aleuticum (Aleutian Maidenhair-Fern) · A. aleuticum 'Dwarf Ecotype' · A. aleuticum 'Imbricatum' · A. aleuticum 'Japonicum' · A. aleuticum 'Laciniatum' · A. aleuticum 'Miss Sharples' · A. aleuticum 'Serpentine Ecotype' · A. aleuticum subpumilum · A. aleuticum 'Subpumilum' · A. amabile · A. amazonicum · A. amblyopteridium · A. amelianum · A. americanum · A. amoenum · A. amplum · A. anceps (Double Edge Maidenhair) · A. andicola · A. aneitense · A. angustatum · A. angustifolium · A. annamense · A. apalophyllum · A. arcanum · A. arcuatum · A. argutum · A. aristatum · A. asarifolium · A. asperum · A. assimile · A. atroviride · A. aubertii · A. auriculatum · A. australe · A. baenitzii · A. balansae · A. balfourii · A. bausei · A. bellum (Bermuda Maidenhair Fern) · A. bessoniae · A. birkenheadii · A. blumenavense · A. boliviense · A. bonatianum · A. bonii · A. bonplandii · A. borbonicum · A. boreale · A. brasiliense · A. braunii · A. breviserratum · A. caffrorum · A. cajennense · A. cajennense var. stenophyllum · A. calcareum · A. candatum · A. cantoniense · A. capense · A. capillaceum · A. capillaris-veneris · A. capillatum · A. capillis-veneris · A. capillium-veneris · A. capillius-veneris · A. capillus (Common Maidenhair) · A. capillus-junonis · A. capillus-venaris · A. capillus-venensis · A. capillus-veneri · A. capillus-veneris (Southern Maidenhair Fern) · A. capillus-veneris 'Banksianum' · A. capillus-veneris 'Cornubiense' · A. capillus-veneris 'Fimbriatum' · A. capillus-veneris 'Imbricatum' (Imbricatum Southern Maidenhair Fern Adiantum Capillus-Veneris) · A. capillus-veneris L. 'Fimbriatum' (Fimbriatum Southern Maidenhair Fern Adiantum Capillus-Veneris) · A. capillus-veneris 'Mairisii' · A. capillus-veneris 'Pointonii' · A. capillus-veneris var. fissum · A. capillus-veneris var. trifidum · A. capillus-venerus · A. capillusveneris · A. capillus gorgonis · A. capilus-veneris · A. capitus-junosis

More Info

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Further Reading

• Bulletin of the British Museum (Natural History). London: The Museum, 1951-1992. ENG url p. 140, p. 142, p. 145.
• Bulletin of the Natural History Museum. Andover: Intercept. ENG url p. 90.
• Contributions to the flora of Venezuela / Julian A. Steyermark and collaborators. Chicago, Ill.: Chicago Natural History Museum, 1957. ENG url p. 750.
• Denkschriften der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Classe. Wien: Aus der Kaiserlich-K©niglichen Hof- und Staatsdruckerei, 1850-1918. GER url p. 107.
• Division, nomenclature & habitat des fougres & lycopodes des Antilles franaises / par le R.-P. Duss. Lons-le-Saunier: Impr. et lithographie L. Duclume, 1903. FRE url p. 60.
• Ferns and fern allies of Guatemala. Robert G. Stolze; the genus Elaphoglossum by: John T. Mickel; the genus Thelypteris by: Alan R. Smith. Chicago, Ill.: Field Museum of Natural History, 1981. ENG url p. 16, p. 27.
• Flora of the Lancetilla Valley, Honduras, by Paul C. Standley. Chicago, Field Museum of Natural History, 1931. ENG url p. 65.
• I. Supplement to the flora of Barro Colorado island, Panama [by] Leslie A. Kenoyer and Paul C. Standley. Chicago, 1929. ENG url p. 144.
• Just's botanischer jahresbericht. Systematisch geordnetes repertorium der botanischen literatur aller länder. Berlin, Gebr. Borntraeger, 1874-98; GER url p. 1083, p. 365.
• Lista de las plantas encontradas hasta ahora en Costa Rica y en los territorios limítrofes: extractada de la "Biologia centrali-americana." [San José: Tip. Nacional, 1888] SPA url p. 93.
• Plantae Utowanae. Plants collected in Bermuda, Porto Rico, St. Thomas, Culebras, Santo Domingo, Jamaica, Cuba, the Caymans, Cozumel, Yucatan and the Alacran shoals. Dec. 1898 to Mar. 1899. The Antillean cruise of the y By Charles Frederick Millspaugh. Chicago, 1900. ENG url p. 20.
• Pteridophyta of Peru. Rolla M. Tryon, Robert G. Stolze. Chicago, Ill.: Field Museum of Natural History, c1989. ENG url p. 67.
• Scientific survey of Porto Rico and the Virgin Islands / New York Academy of Sciences. New York, N.Y.: The Academy, 1919- url p. 420, p. 421.
• Systematische Untersuchungen ber die Vegetation der Karaiben, inbesondere der Insel Guadeloupe. Gttingen, Verlag der Dieterichschen Buchhandlung, 1857. GER url p. 131.

Notes

Contributors

• Bisby, F.A., Y.R. Roskov, M.A. Ruggiero, T.M. Orrell, L.E. Paglinawan, P.W. Brewer, N. Bailly, J. van Hertum, eds (2007). Species 2000 & ITIS Catalogue of Life: 2007 Annual Checklist. Species 2000: Reading, U.K.
• Global Biodiversity Information Facility. Accessed November 15, 2007. http://www.gbif.org Mediated distribution data from 13 providers.

Data Sources

Accessed through GBIF Data Portal November 15, 2007:

• Botanical Research Institute of Texas, Andes to Amazon Biodiversity Program
• GBIF-Spain, CUBA:Herbario del Jardín Botánico Nacional, La Habana, Cuba: HAJB-Pteridophyta
• Herbarium of the University of Aarhus, The AAU Herbarium Database
• Herbier de la Guyane, Herbier de la Guyane
• Instituto Nacional de Biodiversidad
• , Biodiversidad de Costa Rica
• Missouri Botanical Garden, Missouri Botanical Garden

Identifiers

• Biodiversity Heritage Library NamebankID: 2644534
• Catalogue of Life Accepted Name Code: ITS-17320
• Global Biodiversity Information Facility Taxonkey: 13728432
• Globally Unique Identifier: urn:lsid:ipni.org:names:17011830-1
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 17320
• International Plant Names Index (IPNI) ID: 17011820
• MoBot NameID: 26602680
• U.S.D.A. Plant Symbol: ADOB
• Zipcode Zoo Species Identifier: 19632

Footnotes

1. Cathy A. Paris "Adiantum". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
2. Mean = 340.300 meters (1,116.470 feet), Standard Deviation = 597.870 based on 436 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]

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