''Picconia azorica'', locally known as pau-branco, is a species of '' Picconia'' common to the majority of islands of the Portuguese archipelago of the

Azores The Azores ( , , ; , ), officially the Autonomous Region of the Azores (), is one of the two autonomous regions of Portugal (along with Madeira). It is an archipelago composed of nine volcanic islands in the Macaronesia region of the North Atl ...

, where it is

endemic Endemism is the state of a species being found only 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 foun ...

. It can grow to a medium-sized tree, though it is usually found in the form of a shrub. It is threatened by

habitat loss Habitat destruction (also termed habitat loss or habitat reduction) occurs when a natural habitat is no longer able to support its native species. The organisms once living there have either moved elsewhere, or are dead, leading to a decrease ...

Description

The

evergreen In botany, an evergreen is a plant which has Leaf, foliage that remains green and functional throughout the year. This contrasts with deciduous plants, which lose their foliage completely during the winter or dry season. Consisting of many diffe ...

woody plant species is present in all the islands of the Azores, except

Graciosa Graciosa Island () (literally "graceful" or "enchanting" in Portuguese), also referred to as the ''White Island'', is a volcanic island in the Atlantic Ocean. It is the northernmost of the Central Group of islands in the Azores archipelago. The o ...

, usually in coastal and medium altitude forests from sea-level up to about high. Leaves are lanceolate or ovate, opposite and with entire margins. It flowers from March to July, producing small white flowers in axillary clusters.Martins et al. (2011), p.39 The fleshy fruits are dark blue

drupes In botany, a drupe (or stone fruit) is a type of fruit in which an outer fleshy part ( exocarp, or skin, and mesocarp, or flesh) surrounds a single shell (the ''pip'' (UK), ''pit'' (US), ''stone'', or '' pyrena'') of hardened endocarp with a s ...

about long, similar to olive trees (both plants are in the

Oleaceae Oleaceae, also known as the olive family or sometimes the lilac family, is a taxonomic family of flowering shrubs, trees, and a few lianas in the order Lamiales. It presently comprises 28 genera, one of which is recently extinct.Peter S. Gree ...

family).Azores Flora
''Picconia azorica''

Status

The species is very popular in traditional/artesnal carpentry, for furniture construction and religious sanctuary. Since its colonization, the resources of the different islands of the Azores were used to sustain its population. This meant that the forests were also cut-down to support the local economy and day-to-day activities, and other non-endemic species planted to support growing populations, such as the

Cryptomeria ''Cryptomeria'' (literally "hidden parts") is a monotypic genus of conifer in the cypress family Cupressaceae. It includes only one species, ''Cryptomeria japonica'' ( syn. ''Cupressus japonica'' L.f.). It is considered to be endemic to Japan, ...

(''Cryptomeria japonica'') and the

Acacia ''Acacia'', commonly known as wattles or acacias, is a genus of about of shrubs and trees in the subfamily Mimosoideae of the pea family Fabaceae. Initially, it comprised a group of plant species native to Africa, South America, and Austral ...

(''Acacia dealbata'') (which were quick growing in the habitats of the islands).

Overexploitation Overexploitation, also called overharvesting or ecological overshoot, refers to harvesting a renewable resource to the point of diminishing returns. Continued overexploitation can lead to the destruction of the resource, as it will be unable to ...

of the wood led to the species becoming almost extinct in some islands. It has become a priority for re-population and conservation, listed as endangered on the

IUCN The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the status ...

Red List 2004, and Annex II of the Habitats Directive (

Berne Convention on the Conservation of European Wildlife and Natural Habitats Bern (), or Berne (), ; ; ; . is the '' de facto'' capital of Switzerland, referred to as the " federal city".; ; ; . According to the Swiss constitution, the Swiss Confederation intentionally has no "capital", but Bern has governmental i ...

), due to habitat degradation, expansion of agricultural land, forestation, competition by invader species and isolation of populations.

References

;Notes ;Sources * * {{Taxonbar, from=Q3283094 azorica Endangered plants Endemic flora of the Azores Taxonomy articles created by Polbot Plants described in 1933 Habitats Directive species