''Culcita macrocarpa'', the woolly tree fern, is a species of

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 ...

in the family

Culcitaceae ''Culcita'' is a genus of ferns, native to the Americas, Macaronesia and Iberian Peninsula. It is the only genus in the family Culcitaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Alternatively, the family may be treate ...

native to

Macaronesia Macaronesia (Portuguese: ''Macaronésia,'' Spanish: ''Macaronesia'') is a collection of four volcanic archipelagos in the North Atlantic, off the coasts of Africa and Europe. Each archipelago is made up of a number of Atlantic oceanic islands ...

and parts of the

Iberian Peninsula The Iberian Peninsula (), ** * Aragonese and Occitan: ''Peninsula Iberica'' ** ** * french: Péninsule Ibérique * mwl, Península Eibérica * eu, Iberiar penintsula also known as Iberia, is a peninsula in southwestern Europe, defi ...

, where it might have been introduced.

Description

''Culcita macrocarpa'' is a large

plant Plants are predominantly Photosynthesis, photosynthetic eukaryotes of the Kingdom (biology), kingdom Plantae. Historically, the plant kingdom encompassed all living things that were not animals, and included algae and fungi; however, all curr ...

that can reach up to in height and has

fronds A frond is a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group. Other botanists allow the term frond to also apply to the lar ...

up to long. Its rhizomes are thickly coated with long silky, light brown hairs.

Stipes Crucifixion is a method of capital punishment in which the victim is tied or nailed to a large wooden cross or beam and left to hang until eventual death from exhaustion and asphyxiation. It was used as a punishment by the Persians, Carthagin ...

are one third of the

blade A blade is the portion of a tool, weapon, or machine with an edge that is designed to puncture, chop, slice or scrape surfaces or materials. Blades are typically made from materials that are harder than those they are to be used on. Historica ...

length, it has glabrous stabs and

rachis In biology, a rachis (from the grc, ῥάχις [], "backbone, spine") is a main axis or "shaft". In zoology and microbiology In vertebrates, ''rachis'' can refer to the series of articulated vertebrae, which encase the spinal cord. In this c ...

and a shiny green, leathery, triangular blade on top. Serums are protected by the blade's curved lobes.

Distribution and habitat

''Culcita macrocarpa'' is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...

Portugal Portugal, officially the Portuguese Republic, In recognized minority languages of Portugal: :* mwl, República Pertuesa is a country located on the Iberian Peninsula, in Southwestern Europe, and whose territory also includes the Macaronesian ...

and

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = '' Plus ultra'' ( Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , ...

, both on the

and

. It can be found in all of the

Azores ) , motto= ( en, "Rather die free than subjected in peace") , anthem=( en, "Anthem of the Azores") , image_map=Locator_map_of_Azores_in_EU.svg , map_alt=Location of the Azores within the European Union , map_caption=Location of the Azores wi ...

islands except

Graciosa Graciosa Island () (literally "graceful" or "enchanting" in Portuguese) is referred to as the ''White Island'', the northernmost of the Central Group of islands in the Azores. The ovular Portuguese island has an area of , a length of and a width ...

, in the Island of Madeira part of the

Madeira Archipelago ) , anthem = ( en, "Anthem of the Autonomous Region of Madeira") , song_type = Regional anthem , image_map=EU-Portugal_with_Madeira_circled.svg , map_alt=Location of Madeira , map_caption=Location of Madeira , subdivision_type= Sovereign s ...

and in

Tenerife Tenerife (; ; formerly spelled ''Teneriffe'') is the largest and most populous island of the Canary Islands. It is home to 43% of the total population of the Archipelago, archipelago. With a land area of and a population of 978,100 inhabitant ...

on the

Canary Islands The Canary Islands (; es, Canarias, ), also known informally as the Canaries, are a Spanish autonomous community and archipelago in the Atlantic Ocean, in Macaronesia. At their closest point to the African mainland, they are west of Mo ...

. It is very rare in Santa Maria. In the Iberian Peninsula it is found in the north Cantabrian and Asturian coasts, northern

Galicia Galicia may refer to: Geographic regions * Galicia (Spain), a region and autonomous community of northwestern Spain ** Gallaecia, a Roman province ** The post-Roman Kingdom of the Suebi, also called the Kingdom of Gallaecia ** The medieval King ...

and in mountainous areas around

Porto Porto or Oporto () is the second-largest city in Portugal, the capital of the Porto District, and one of the Iberian Peninsula's major urban areas. Porto city proper, which is the entire municipality of Porto, is small compared to its metropo ...

and the

Province of Cádiz Cádiz is a province of southern Spain, in the southwestern part of the autonomous community of Andalusia. It is the southernmost part of mainland Spain, as well as the southernmost part of continental Europe. It is bordered by the Spanish provinc ...

. The populations found in Iberia might be the result of an

introduction Introduction, The Introduction, Intro, or The Intro may refer to: General use * Introduction (music), an opening section of a piece of music * Introduction (writing), a beginning section to a book, article or essay which states its purpose and ...

. It grows on siliceous rocky slopes, especially in deep valleys under evergreen forest and near coastal areas, sometimes in scrubland up to elevation. It is usually found close to waterfalls or streams that provide moisture in the form of spray. This species requires shade and warm temperatures all year round, with high atmospheric humidity to flourish. It grows in all types of soils but avoids limestone substrates and is especially common on the herbaceous layer of high elevation montane forests of the Azores.

Threats

''Culcita macrocarpa'' is threatened by the conversion of forests into plantations. In

mainland Portugal Continental Portugal ( pt, Portugal continental, ) or mainland Portugal comprises the bulk of the Portuguese Republic, namely that part on the Iberian Peninsula and so in Continental Europe, having approximately 95% of the total population and ...

, where it is classified as critically endangered,

fire Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction Product (chemistry), products. At a certain point in the combustion reaction, called the ignition ...

is the main threat to the species and

eucalyptus ''Eucalyptus'' () is a genus of over seven hundred species of Flowering plant, flowering trees, shrubs or Mallee (habit), mallees in the Myrtaceae, myrtle Family (biology), family, Myrtaceae. Along with several other genera in the Tribe (biology) ...

plantations cause soil desiccation that prevent the species from growing.

References

Flora of Macaronesia Flora of Portugal Flora of Spain Cyatheales {{Cyatheales-stub