''Polypodium cambricum'', the southern polypody, limestone polypody, or Welsh polypody, is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

fern A fern (Polypodiopsida or Polypodiophyta ) is a member of a group of vascular plants (plants with xylem and phloem) that reproduce via spores and have neither seeds nor flowers. The polypodiophytes include all living pteridophytes except t ...

in the

family Family (from la, familia) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its ...

Polypodiaceae,

native Native may refer to: People * Jus soli, citizenship by right of birth * Indigenous peoples, peoples with a set of specific rights based on their historical ties to a particular territory ** Native Americans (disambiguation) In arts and entert ...

to southern and western Europe where it grows on shady rocks, near the coasts of the

Mediterranean Basin In biogeography, the Mediterranean Basin (; also known as the Mediterranean Region or sometimes Mediterranea) is the region of lands around the Mediterranean Sea that have mostly a Mediterranean climate, with mild to cool, rainy winters and w ...

and in the mountains of

Atlantic Europe Atlantic Europe is a geographical term for the western portion of Europe which borders the Atlantic Ocean. The term may refer to the idea of Atlantic Europe as a cultural unit and/or as a biogeographical region. It comprises the Atlantic Isles ...

. It is a spreading, terrestrial,

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...

fern growing to tall, with pinnate fronds. The sori are yellow in winter.

Description

Perennial.

Rhizome In botany and dendrology, a rhizome (; , ) is a modified subterranean plant stem that sends out roots and shoots from its nodes. Rhizomes are also called creeping rootstalks or just rootstalks. Rhizomes develop from axillary buds and grow hori ...

elongate, often above ground, densely covered with rusty scales. Fronds distich, , glabrous, deltoid in outline; petiole yellowish green, shorter than the pinnatipartite limb. Segments 5-28 on each side; margin dentate, marked with a strong midrib. Sori round, in diameter, orange-yellow, arranged on each side of the midrib of segments. The fruits bloom from February to July.

Name

This species has been widely known by the more apt name ''P. australe'' Fée. However, since Linnaeus did mention the species, albeit in the aberrant ''cambricum''-form, that name must have priority.

Etymology

Polypodium is derived from the Greek ''Polus'', many, and ''podion'', small foot, since the rhizome bears numerous roots. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

''cambricum'' means "Welsh", from the Latinized form of ''

Cymru Wales ( cy, Cymru ) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in 202 ...

'', the Welsh name for Wales. ''Australe'' comes from the Latin ''auter'', wind of the south, for in

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

, this species grows largely in the

Cultivation

Two

cultivar A cultivar is a type of cultivated plant that people have selected for desired traits and when propagated retain those traits. Methods used to propagate cultivars include: division, root and stem cuttings, offsets, grafting, tissue culture, ...

s have received the

Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nort ...

Award of Garden Merit The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. History The Award of Garden Merit ...

: *'Cambricum' *'Grandiceps Fox' (Cristatum Group)

References

{{Taxonbar, from=Q1389073 cambricum Ferns of Africa Ferns of Asia Ferns of Europe Flora of Lebanon Flora of England Flora of Ireland Flora of Scotland Flora of Wales Plants described in 1753 Taxa named by Carl Linnaeus