Pilularia

Pilularia

Taxobox
name = "Pilularia"


image_width = 240px
image_caption = Pillwort, "Pilularia globulifera"
regnum = Plantae
divisio = Pteridophyta
classis = Pteridopsida
ordo = Salviniales
familia = Marsileaceae
genus = "Pilularia" L.
subdivision_ranks = Species
subdivision = "Pilularia americana" A. Braun "Pilularia globulifera" "Pilularia minuta" and maybe some others

Pilularia is a genus of unusual ferns of family Marsileaceae distributed in North Temperate regions, Ethiopian mountains, and the the southern hemisphere in Australia, New Zealand, and western South America.

Depending on the taxonomic revisor, the genus contains between 3 and 6 species of small plants with thread-like leaves, and creeping rhizomes. The sporangia are borne in spherical sporocarps ("pills") which form in the axils of leaves. "Pilularia minuta" from SW Europe is one of the smallest of all ferns.

"P. globulifera"

"Pilularia globulifera", or pillwort, is native to western Europe, where it grows at edges of lakes, ponds, ditches and marshes, on wet clay or clay-sand soil, sometimes in water up to 30cm deep. It has a pea-shaped 4-chambered sporocarp, each chamber with sorus bearing both macrosporangia and microsporangia.

Some of the plants growing in association with this species in the UK include water celery ("Apium inundatum"), marsh pennywort ("Hydrocotyle vulgaris") and lesser spearwort ("Ranunculus flammula").

This is an internationally threatened species included in the European Red Data Book.It is listed on Schedule 8 of the Wildlife (Northern Ireland) Order 1985, but it has not been seen since 1970 and may now be extinct in the province. It is protected under the Wildlife and Countryside Act 1981 in the rest of the UK, where it is now classified as Vulnerable.

Pillwort can be grown in a "bog garden" or as a marginal aquatic in a garden pond.

References

* [http://www.ukbap.org.uk/UKPlans.aspx?ID=518 UK Biodiversity Action Plan]

* Preston, C.D. & Croft, J.M. (1997). "Aquatic Plants in Britain and Ireland". Harley Books, pp.31-32.

External links

* [http://www.whildassociates.co.uk/BSBI/TPDB/Pilularia/pilularia.html Pilularia globulifera UK distribution]


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Look at other dictionaries:

  • Pilulāria — L. (Pillenkraut), Gattung der Marsiliazeen, farnartige Wasserpflanzen (Pteridophyten) mit kriechenden, verzweigten, bewurzelten Stämmchen und zweireihigen, fadenförmigen, in der Jugend schneckenförmig eingerollten Blättern, an deren Grund die… …   Meyers Großes Konversations-Lexikon

  • Pilularĭa — (P. L., Pillenfarrn), Pflanzengattung aus der Familie der Marsilaeaceae; Art: P. globulifera, mit kugelrunden, vierfächerigen Samenbehältern am Grunde der Sprossen, u. zartem, auf der Erde sich ausbreitendem Laube; an Sümpfen, Teichen,… …   Pierer's Universal-Lexikon

  • Pilularia —   [lateinisch], die Pflanzengattung Pillenfarn …   Universal-Lexikon

  • Pilularia — globulifera …   Wikipédia en Français

  • Pilularia — Pillenfarne Gewöhnlicher Pillenfarn, aus Thomé: Flora von Deutschland, Österreich und der Schweiz Systematik Unterreich …   Deutsch Wikipedia

  • Pilularia — noun pillworts • Syn: ↑genus Pilularia • Hypernyms: ↑fern genus • Member Holonyms: ↑Marsileaceae, ↑family Marsileaceae • Member Meronyms: ↑ …   Useful english dictionary

  • Pilularia — ID 63857 Symbol Key PILUL Common Name pillwort Family Marsileaceae Category Fern Division Pteridophyta US Nativity N/A US/NA Plant Yes State Distribution AL, AR, CA, GA, KS, MO, NE, OK, OR, SC, TN, TX, WA Growth Habit N/A …   USDA Plant Characteristics

  • Pilularia globulifera — Pilularia globulifera …   Wikipédia en Français

  • Pilularia globulifera — noun European water fern found around margins of bodies of water or in wet acid soil having small globose sporocarps • Syn: ↑pillwort • Hypernyms: ↑aquatic fern, ↑water fern • Member Holonyms: ↑Pilularia, ↑genus Pilularia …   Useful english dictionary

  • Pilularia globulifera — Peppergrass Pep per*grass , n. (Bot.) (a) Any herb of the cruciferous genus {Lepidium}, especially the garden peppergrass, or garden cress, {Lepidium sativum}; called also {pepperwort}. All the species have a pungent flavor. (b) The common… …   The Collaborative International Dictionary of English

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