Pteridium aquilinum var. pubescens

• Common Names
• Description
• Biology
• Taxonomy
• Similar Species
• Bibliography
• More Info
• Notes

Common Names

Description

Genus Pteridium

Plants terrestrial , often forming colonies or thickets. Stems subterranean , slender, long-creeping; hairs pale to dark, jointed ; scales absent; true vessels present (absent in other Dennstaedtiaceae genera in the flora ). Leaves widely spaced, broadly deltate, 0.5--4.5 m. Petiole glabrous to short-hairy, without prickles, with stem buds near base , vascular bundles numerous , U- or O-shaped in cross section . Blade 2--4-pinnate, rachis and costae grooved adaxially; rachis without prickles; nectaries at base of proximal and sometimes distal pinnae. Segments pinnately divided , ultimate segments ovate to oblong to linear , base extending proximally on costae (decurrent) or proximally (surcurrent ), margins entire . Veins free or joined at margin by commissural vein beneath sori, pinnately 2--3-forked. Sori ± continuous, covered by recurved, outer false indusium and obscure , extrorse , inner true indusium. Spores tetrahedral-globose, trilete, very finely granulate . x = 26.

Species 1 (1 species, 4 vari: almost worldwide.Carol A. Jacobs, James H. Peck "Pteridium". in Flora of North America Vol. 2. Oxford University Press. Online at EFloras.org.

Physical Description

Biology

Reproduction

Duration: Perennial

Taxonomy

Unambiguous Synonyms

1. Pteridium aquilinum var. lanuginosum (Bong.) Fern.
2. Pteridium aquilinum subsp. lanuginosum (Bong.) Hultén

Notes

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

Similar Species

Members of the genus Pteridium

There are approximately 86 species in this genus:

P. angustissimum · P. aqquilinum · P. aquiilinum · P. aquilijnum · P. aquilimum · P. aquilinium · P. aquilinum (Bracken) · P. aquilinum aquilinum · P. aquilinum atlanticum · P. aquilinum caudata · P. aquilinum caudatum · P. aquilinum decompositum (Bracken) · P. aquilinum esculentum · P. aquilinum f. arachnoidea · P. aquilinum f. decipiens · P. aquilinum f. glabrata · P. aquilinum f. pumila · P. aquilinum latiusculum · P. aquilinum Percristatum Group · P. aquilinum pseudocaudatum · P. aquilinum subsp. aquilinum · P. aquilinum subsp. atlanticum · P. aquilinum subsp. capense · P. aquilinum subsp. caudata · P. aquilinum subsp. centrali-africanum · P. aquilinum subsp. decompositum · P. aquilinum subsp. esculentum · P. aquilinum subsp. fulvum · P. aquilinum subsp. herediae · P. aquilinum subsp. japonicum · P. aquilinum subsp. latiusculum · P. aquilinum subsp. pinetorum · P. aquilinum subsp. pseudocaudatum · P. aquilinum subsp. typicum · P. aquilinum subsp. wightianum · P. aquilinum typicum · P. aquilinum var. champlainense (Champlain's Brackenfern) · P. aquilinum var. decompositum · P. aquilinum var. esculentum · P. aquilinum var. feei · P. aquilinum var. latiusculum (Western Brackenfern) · P. aquilinum var. pseudocaudatum (Western Brackenfern) · P. aquilinum var. pubescens (Bracken) · P. aquilinum var. wightianum · P. aquilinum var. yarrabense · P. aquilium · P. aquillinum · P. arachnoideum (Tropical Brackenfern) · P. arochnoideum · P. atrum · P. baerii · P. bertrandii · P. calabazensis · P. capense · P. caudatum (Southern Brackenfern) · P. caudatum subsp. arachnoideum · P. caudatum subsp. yarrabense · P. centrali-africanum · P. corymbosa · P. decompositum · P. esculentum (Austral Bracken) · P. falcatum · P. feei · P. heredia · P. herediae · P. lanuginosum · P. latiusculum f. berdii · P. latiusculum subsp. pinetorum · P. latiusculum var. latiusculum · P. latiusculum var. verum · P. lineare · P. oeningense · P. pinetorum · P. pinetorum osmundaceum · P. pinetorum subsp. osmundaceum · P. proliferum · P. psittacinum · P. revolutum · P. rostratum · P. scalabazensis · P. semihastatum · P. spinulosum · P. tataricum · P. tauricum · P. yarrabense · P. yunnanense

Bibliography

• Page, C. N. 1976. The taxonomy and phytogeography of bracken---A review. J. Linn. Soc., Bot. 73: 1--34.
• Perring, F. H. and B. G. Gardener, eds. 1976. The biology of bracken. [Symposium.] J. Linn. Soc., Bot. 73(1--3): i--vi, 1--302.
• Tryon, R. M. 1941. A revision of the genus Pteridium. Rhodora 43: 1--31, 37--67.

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

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.
• Brands, S.J. (comp.) 1989-2007. Systema Naturae 2000. The Taxonomicon. Universal Taxonomic Services, Amsterdam, The Netherlands. Accessed March 28, 2007.
• The International Plant Names Index. Accessed Jan 19, 2007.
• USDA, NRCS. 2005. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Identifiers

• Catalogue of Life Accepted Name Code: ITS-529922
• Global Biodiversity Information Facility Taxonkey: 13904792
• Globally Unique Identifier: urn:lsid:ipni.org:names:1109463-2
• Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 529922
• International Plant Names Index (IPNI) ID: 213796-2
• Natural Heritage Network Species Identifier: PPDEN08017
• U.S.D.A. Plant Symbol: PTAQP2
• Zipcode Zoo Species Identifier: 1017927

Footnotes

©2004-2008 the BayScience Foundation, Inc. All rights reserved.