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Antrophyum cajenense

(Forked Lineleaf Fern)

Interesting Facts

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Common Names

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Common Names in English:

Forked Lineleaf Fern

Description

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Family Pteridaceae

Genera ca. 40, species ca. 1000 (13 genera, 90 sp: worldwide.

Considerable disagreement exists concerning the circumscription and proper name of this family . The taxa comprising the Pteridaceae in this treatment were assigned to the Sinopteridaceae and Pteridaceae by D. B . Lellinger (1985) and were included in five families by R. E. G. Pichi-Sermolli (1977). The broad concept followed here is similar (except for the exclusion of Ceratopteris ) to that espoused by R. M. Tryon and A. F. Tryon (1982), who applied the name Pteridaceae to the group. Until very recently, the newer name Adiantaceae was more commonly used.

As represented in North America, Pteridaceae comprise three major evolutionary lines (the adiantoids, the pteroids, and the cheilanthoids). Characteristics holding the family together include abaxial (usually submarginal ) sori that lack indusia or are protected by a reflexed or revolute leaf margin , spores that are usually globose-tetrahedral and trilete, and chromosome base numbers of 30 or 29 (rarely 27). The xeric-adapted members of the family (particularly the cheilanthoids) have undergone extensive parallel and convergent evolution, and they have frustrated attempts to produce a natural generic classification based on macromorphologic characteristics alone. Although some workers have aggregated species into a few large genera (e.g. , J. T. Mickel 1979b), most tend to recognize smaller segregate genera based on a combination of morphologic, chromosomal, and biochemical data. The latter approach seems to provide a more useful, evolutionarily informative classification and is the one adopted here. Aspidotis and Notholaena are maintained here as distinct from Cheilanthes, and three recently described genera ( Argyrochosma, Astrolepis, and Pentagramma ) have been incorporated into the treatment. The reasons for these changes in generic circumscription are discussed under the individual genera.[1]

Physical Description

Habit: Forb/herb

Habitat

Typically found at an altitude of 0 to 4,936 meters (0 to 16,194 feet).[2]

Biology

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Reproduction

Duration: Perennial

Taxonomy

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Synonyms

Antrophyum Cajennense • Antrophyum cajennense (Desv.) Kaulf. • Hemionitis Cajenensis • Hemionitis cajenensis Desv. • Polytaenium cajenense (Desv.) Benedict

Notes

Publishing author : Spreng. Publication : Syst. Veg. (ed. 16) [Sprengel] 4(1): 67 1827 [shortly before 7 Jan 1827]

Basionym author: (Desv.)

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Antrophyum

ZipcodeZoo has pages for 5 species, subspecies, varieties, forms, and cultivars in this genus:

A. cajenense (Forked Lineleaf Fern) · A. intramarginale (Tufted Lineleaf Fern) · A. lanceolatum (Straight Lineleaf Fern) · A. lineatum (Narrow Lineleaf Fern) · A. urbanii (Urban's Lineleaf Fern)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 16, 2007:

Identifiers

Footnotes

  1. Michael D. Windham "Pteridaceae". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
  2. Mean = 573.890 meters (1,882.841 feet), Standard Deviation = 741.120 based on 307 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012