Interesting Facts
Description
Genus Diplazium
Plants
terrestrial
or on rock. Stems creeping
, ascending
, or erect
, stolons absent. Leaves monomorphic
, evergreen
or dying back in winter. Petiole
ca.
1/2 to equaling length
of blade
, base
swollen and persisting as trophopod over winter or not; vascular bundles
2, lateral
, lunate
in cross
section
. Blade oblong-lanceolate to deltate, 1-pinnate to 2-pinnate-pinnatifid [simple
to 4-pinnate-pinnatifid], gradually reduced distally to pinnatifid
apex or apical pinna similar to (conform) adjacent
pinnae, herbaceous to papery
. Pinnae not articulate
to rachis, segment margins
entire, crenulate
, or serrate; proximal
pinnae not reduced, sessile, equilateral
or inequilateral
; costae adaxially deeply grooved
, grooves
continuous with that of rachis; indument
abaxially absent or of linear
to ovate
scales
, adaxially absent. Veins free
, simple or forked
, or basal pairs of adjacent segments anastomosing. Sori single or paired
back-to-back on veins, oblong
to linear, straight or slightly falcate
; indusia linear, laterally attached, persistent
. Spores brownish, usually broadly winged
. x
= 40, 41.
Species about 400: worldwide.
In a few species outside the flora
, rachises and costae bear multicellular
hairs
like those of Deparia, which differs from Diplazium in having grooves of costae not decurrent onto rachis groove, veins free or anastomosing, sori long or short and costular
, and indusia present or absent. Many species of Diplazium are known to reproduce apogamously.[1]
Habitat
Typically found at an altitude of 0 to 2,458 meters (0 to 8,064 feet).[2]
Taxonomy
- Domain:
Eukaryota
(
)
- Whittaker & Margulis,1978
- eukaryotes
- Kingdom:
Plantae
()
- Haeckel, 1866
- Plants
- Subkingdom:
Viridaeplantae
()
- Cavalier-Smith, 1981
- Phylum:
Tracheophyta
()
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Subphylum:
Euphyllophytina
()
- Infraphylum:
Moniliformopses
()
- Kenrick & Crane, 1997, Nom. Nud.
- Class:
Polypodiopsida
()
- Cronquist et al.
- Order:
Polypodiales
()
- Link
- Family:
Woodsiaceae
()
- (Chapm.) Herter
- Genus:
Diplazium
()
- Swartz, 1801
- Twin-sorus fern [Greek diplazein, double, or di, two, and plasion, oblong, referring to a double sorus]
- Specific epithet:
franconis
- Christ
- Botanical name: - Diplazium franconis Christ
- Specific epithet:
franconis
- Christ
- Genus:
Diplazium
(
- Family:
Woodsiaceae
(
- Order:
Polypodiales
(
- Class:
Polypodiopsida
(
- Infraphylum:
Moniliformopses
(
- Subphylum:
Euphyllophytina
(
- Phylum:
Tracheophyta
(
- Subkingdom:
Viridaeplantae
(
- Kingdom:
Plantae
(
Notes
An accepted name in the RHS Horticultural Database.
Similar Species
Members of the genus Diplazium
ZipcodeZoo has pages for 16 species, subspecies, varieties, forms, and cultivars in this genus:
D. centripetale (Royal Twinsorus Fern) · D. cristatum (Crested Twinsorus Fern) · D. esculentum (Vegetable Fern) · D. expansum (Great Fern) · D. grandifolium (Largeleaf Twinsorus Fern) · D. hymenodes (Peacock Fern) · D. lherminieri (L'herminier's Twinsorus Fern) · D. lonchophyllum (Lance-Leaf Twin-Sorus Fern) · D. meyenianum (Meyen's Twin-Sorus Fern) · D. molokaiense (Molokai Twin-Sorus Fern) · D. plantaginifolium (Plantainleaf Twinsorus Fern) · D. pycnocarpon (Glade Fern) · D. riedelianum (Riedel's Twinsorus Fern) · D. sandwichianum (Hawai'i Twinsorus Fern) · D. striatum (Striped Twinsorus Fern) · D. unilobum (Singlelobe Twinsorus Fern)
More Info
- Search for Pictures: images.google.com
- Search for Scholarly Articles: Google Scholar
- Search using Scientific Name and Vernacular Names: All the Web | AltaVista Canada | AltaVista | Excite | Google | HotBot | Lycos
- Search using Specialized Databases: GenBank | Medline | Scirus | CISTI/CAL | Agricola Periodicals | Agricola Books
Further Reading
- Bulletin of the Natural History Museum. London: The Natural History Museum, c1993-2002. url p. 95.
- Contributions from the United States National Herbarium 38 1974 Washington, D.C.: Smithsonian Institution Press, 1890- url p. 221, p. 488.
- Ferns and fern allies of Guatemala. Robert G. Stolze; the genus Elaphoglossum by: John T. Mickel; the genus Thelypteris by: Alan R. Smith. 6 1981 Chicago, Ill.: Field Museum of Natural History, 1981. url p. 188.
- Proceedings of the Biological Society of Washington. Washington, Biological Society of Washington url p. 175.
- Johnson, D. M. 1986. Trophopods in North American species of Athyrium (Aspleniaceae). Syst. Bot. 11: 26--31.
- Kato, M. 1977. Classification of Athyrium and allied genera of Japan. Bot. Mag. (Tokyo) 90: 23--40.
Notes
Contributors
- Brands, S.J. (comp.) 1989-present. The Taxonomicon. Universal Taxonomic Services, Zwaag, The Netherlands. Accessed January 10, 2012.
Data Sources
Accessed through GBIF Data Portal March 17, 2008:
- Comisión nacional para el conocimiento y uso de la biodiversidad: Herbario del Instituto de Ecología, A.C., México (IE-BAJIO)
- Comisión nacional para el conocimiento y uso de la biodiversidad: Herbario del Instituto de Ecología, A.C., México (IE-XAL)
- Instituto Nacional de Biodiversidad (Costa Rica): Biodiversidad de Costa Rica
- Missouri Botanical Garden
Identifiers
- Biodiversity Heritage Library NamebankID: 3418728
- Global Biodiversity Information Facility Taxonkey: 15905357
- Globally Unique Identifier: urn:lsid:ipni.org:names:17086940-1
- International Plant Names Index (IPNI) ID: 81547-2
- Zipcode Zoo Species Identifier: 1100192
Footnotes
- Masahiro Kato "Diplazium". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org. [back]
- Mean = 829.330 meters (2,720.899 feet), Standard Deviation = 703.390 based on 78 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
