Polypodium virginianum

Polypodium virginianum
Rock Polypody
Polypodium virginianum
Scientific classification
Kingdom: Plantae
Division: Pteridophyta
Class: Polypodiopsida/Pteridopsida (disputed)
Order: Polypodiales
Family: Polypodiaceae
Genus: Polypodium
Species: P. virginianum
Binomial name
Polypodium virginianum
L.

Polypodium virginianum, commonly known as Rock Polypody, Rock Cap Fern, or Common Polypody, is a small evergreen species of fern native to the Eastern United States and Canada. It generally grows on rocks and occasionally on tree roots in nature.

Contents

Description

Polypodium virginianum is a small rhizomatous fern with narrow leaves 8-40 cm long and 3-6 cm wide borne on smooth, scaleless petioles (3-15 cm). Leaves are evergreen, oblong and pinnatifid with acuminate tips. Large, circular sori are prominently featured on the underside of fertile fronds in late summer and autumn. Sporangia are intermixed with long brown glandular hairs. [1]

Underside of a fertile frond of Polypodium virginianum.
Close up of the underside of a fertile frond of Polypodium virginianum.
Close up
Numerous sori on the underside of a leaf.

Taxonomy

Polypodium virginianum has several synonyms including: P. vinlandicum A. Love & D. Love, P. vulgare L. var. americanum Hooker, P. vulgare L. var. virginianum (L.) D. C. Eaton[2]. It is generally treated as distinct, though some have recommended it is equally well treated as a North American variety of the circumboreal P. vulgare.[1]

This species is an allotetraploid of hybrid origin, the parents being Polypodium appalachianum and P. sibiricum.

Habitat and distribution

P. virginianum typically grows on boulders, cliffs, and rocky slopes and does not need well-developed soil. It is common throughout Eastern North America; its native distribution ranges from Newfoundland to Yukon south to Georgia, Alabama, and Arkansas.[1]

References

  1. ^ a b c Gleason, Henry A. and Cronquist, Arthur (1991). Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Bronx, NY: The New York Botanical Garden Press. ISBN 0-89327-365-1. 
  2. ^ eFloras (2008). Published on the Internet http://www.efloras.org (accessed 22 November 2009) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA. efloras: Polypodium virginianum

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Look at other dictionaries:

  • Polypodium virginianum — Polypodium virginianum …   Wikipédia en Français

  • Polypodium virginianum — Polypodium virginianum …   Wikipédia en Français

  • Polypodium virginianum — ID 66645 Symbol Key POVI7 Common Name rock polypody Family Polypodiaceae Category Fern Division Pteridophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, CT, DC, DE, GA, IA, IL, IN, KY, MA, MD, ME, MI, MN, MO, NC, NH, NJ …   USDA Plant Characteristics

  • Polypodium virginianum L. — Symbol POVI7 Common Name rock polypody Botanical Family Polypodiaceae …   Scientific plant list

  • Polypodium vulgare var. virginianum — Polypodium virginianum Polypodium virginianum …   Wikipédia en Français

  • Polypodium — Saltar a navegación, búsqueda ? Polypodium Polypodium vulgare …   Wikipedia Español

  • Polypodium vulgare — Scientific classification Kingdom: Plantae Division …   Wikipedia

  • Polypodium — Taxobox name = Polypodium image width = 240px image caption = Common Polypody, Polypodium vulgare regnum = Plantae divisio = Pteridophyta classis = Pteridopsida ordo = Polypodiales familia = Polypodiaceae genus = Polypodium genus authority = L.… …   Wikipedia

  • Polypodium vulgare — Polypode commun Polypode commun …   Wikipédia en Français

  • Polypodium vulgare L. var. virginianum (L.) Eaton — Symbol POVI7 Synonym Symbol POVUV2 Botanical Family Polypodiaceae …   Scientific plant list

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