Flora of Italy

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The green leaves, white flowers and red berries of the strawberry tree, whose colors recall the flag of Italy: for this reason this bush is considered one of the Italian national symbols.[1] The strawberry tree, which is native to the Mediterranean region, is the national tree of Italy.[1]

The flora of Italy is all the plant life present in the territory of the Italian Republic. The flora of Italy was traditionally estimated to comprise about 5,500 vascular plant species.[2] However, as of 2019, 7,672 species are recorded in the second edition of the flora of Italy and in its digital archives Digital flora of Italy.[3] In particular, 7,031 are autochthonous and 641 are non native species widely naturalized since more than three decades. Additionally, further 468 exotic species have been recorded as adventitious or naturalized in more recent times.

Geobotanically, the Italian flora is shared between the Circumboreal Region and Mediterranean Region. According to the index compiled by the Italian Ministry for the Environment in 2001, 274 vascular plant species were protected. Italy has 1,371 endemic plant species and subspecies.

Biodiversity[edit]

Italy is one of the richest European countries in both plant and animal biodiversity, with a population very rich in endemic forms.[4] During the Pleistocene glaciations, the Italian territory remained largely free of ice, which allowed the flora and fauna to survive, something that did not happen in the central-northern areas of the continent, and the retreat of the great glaciers has left glacial relict fauna in some mountain locations.[5]

The Italian territory extends over about 10° of latitude, therefore, while remaining in the context of temperate climates without extremes of heat, cold or aridity, the climatic difference between the north and the south of the country is not at all negligible, going from the nival climates of the Alpine peaks, to the cool semi-continental temperate climate of the Po Valley, to the Mediterranean climate of the central-southern coasts and the islands.[6] Italy is predominantly hilly and mountainous in nature of the territory, which has caused a proliferation of ecological niches, close in space but very diversified.[7]

Geography and climate[edit]

Map of the hardiness zones of Italy.
  Area of conifers and blueberries
  Area of beech and raspberries
  Area of chestnut and vine
  Area of olive tree
  Area of citrus

Italy consists of a 1,000 km (620 miles) long peninsula extending out into the central Mediterranean, together with a number of islands to the south and west. The Apennines run north-south through the peninsula connecting the Alps in the north to Etna and the Peloritani mountains in Sicily in the south. The geology is diverse.

Northern Italy is dominated by the Alps and an extensive valley of the Po river which is extensively agricultural and industrialised. Central Italy includes the regions of Tuscany, Umbria, Marche and Lazio. It is dominated by the Apennines, from which a few major rivers flow. There are few natural plains. A process of land reclamation has replaced the coastal swamps and marshes with agricultural land.

Southern Italy includes the regions of Abruzzo, Molise, Apulia, Basilicata and Campania. Agriculture and industry are less developed. The main islands are Sicily, Sardinia and the Aeolian Islands.

Because of the length of the Italian peninsula and the mostly mountainous hinterland, the climate of Italy is highly diverse. In most of the inland northern and central regions, the climate ranges from humid subtropical to humid continental and oceanic. In particular, the climate of the Po valley geographical region is mostly continental, with harsh winters and hot summers.[8][9] The coastal areas of Liguria, Tuscany and most of the South generally fit the Mediterranean climate stereotype (Köppen climate classification). Each region has a distinct flora.

Ecoregions[edit]

An ecoregion is an ecologically and geographically defined area with characteristic natural communities and species. Different ecoregions are distinguished by different vegetation features. Most of the Italian territory is included in the Mediterranean Basin. Important Italian terrestrial ecoregions include the Illyrian deciduous forests, the Italian sclerophyllous and semi-deciduous forests, the South Apennine mixed montane forests, the Tyrrhenian-Adriatic sclerophyllous and mixed forests, Apennine deciduous montane forests, the Dinaric Mountains mixed forests and the Po Basin mixed forests.

Sea marigold, a critically endangered species endemic to Sicily

In Italy Carlo Blasi et al. identified and mapped two divisions (Temperate and Mediterranean), 13 provinces, 33 sections and approximately 80 subsections. Each unit has an alphanumeric code that indicates its hierarchical level and a full name that indicates its geographic location and main diagnostic factor.[10]

  • the Temperate division includes the Alps, the Po Plain, and most of the Apennines. It accounts for 64% of Italy. This area is characterized by almost absent summer aridity and by marked differences between summer and winter temperatures. The natural vegetation mainly consists of forests, with broad-leaved deciduous plants (Quercus, Fagus and Carpinus species).
  • the Mediterranean division includes the southern Apennines, the Tyrrhenian and Ionian coasts, the southern Adriatic coast and the Islands. It accounts for almost 36% of the Italian territory. This area is characterized by summer aridity, with precipitations concentrated in autumn and winter. The natural vegetation mainly consists of mixed woods of evergreen and deciduous species, shrublands and Mediterranean maquis.

The floral composition[edit]

Sicilian Fir, a critically endangered species endemic to Sicily

The native vegetation of Italy reflects the diversity of the physical environment: the differences in geology, the differences of altitude above sea level and the diversity of the climate between the continental and the peninsular Italy, that give rise to various phytoclimatic areas.

The peninsula and islands are dominated by the characteristics of the Mediterranean climate, with mild and rainy winters and very warm and dry summers. On the contrary, the north of Italy has lower temperatures in winter and a more uniform distribution of rainfall during the summer.

The species of plants present in Italy belong to the flora of the continental Europe or to the Mediterranean flora. In some cases Western species can be distinguished (e.g. the hornbeam, limited to Western Europe) and eastern species (e.g. the oriental hornbeam, present in Eastern Europe).

The last ice age, the Würm Glaciation, in the Alps ended about 12,000 years ago, and one can still recognize its influence on vegetation, in particular by means of glacial relict species. A well known example is the Etna birch (Betula aetniensis), driven in Sicily at a time when the climate was much colder.

Broadly there are three different vegetational zones of forests or bushes in Italy:

In the Po Basin can be found mixed forests that include mixed deciduous oak/hornbeam forests (Quercus robur, Quercus cerris, Carpinus betulus, Ulmus minor, Fraxinus ornus) and Riparian forest, as well as flood-plain vegetation of the Po Basin (Fraxinus oxycarpa, Salix alba, Alnus glutinosa, Ulmus minor, Populus alba, Populus nigra, Quercus robur).

There are also plant associations almost treeless: grasslands, pastures, deserts. In the mountains, gradually, the forest turns in mountain pastures, scattered in various shrubs (e.g. Pinus mugo, rhododendrons, junipers) and dotted with small colorful flowers. Higher up are the montane grasslands and even areas similar to a desert because they have no or almost no vegetation (rocks, glaciers).

Species richness in Southern Europe[edit]

Italy has around 6,711 (6,759) species of vascular plants (Conti et al., 2005 An inventory of vascular plants endemic to Italy), preceded only by the Iberian Peninsula and Balearic Islands with around 7,500 vascular plant taxa (species and subspecies) (Castroviejo 2010 Flora Iberica). In Greece, the number of species is around 5,700 (Strid and Tan, 1997 Flora Hellenica) and in France, there are 4,630 species (Walter and Gillett, 1998 1997 IUCN red list of threatened plants). Per unit area Greece is the country with the highest concentration of native plant species.

Endemic species[edit]

Italy has 1,371 endemic plant species and subspecies (18.9% of the total vascular flora).[11] Endemic species include Abies nebrodensis, Allium agrigentinum, Anthemis cupaniana, Calendula maritima, Erysimum etnense, Galium litorale, Petagnaea, Sicilian Fir, Silene hicesiae, Viola ucriana, Zelkova sicula, Aquilegia barbaricina, Aquilegia nuragica, Centaurea gymnocarpa, Centranthus amazonum, Cerastium utriense, Dianthus rupicola, Gagea chrysantha, Galium baldense, Galium glaucophyllum, Genista aetnensis, Hieracium lucidum, Iris benacensis, Iris bicapitata, Iris marsica, Iris pseudopumila, Ophrys calliantha, Orchis brancifortii, Polygala sinisica, Ribes sardoum and Santolina pinnata.

Threats[edit]

Habitat loss, fragmentation and degradation are the most significant threats to plant species that occur in Italy. Also changing water flow patterns and over-extraction, increasing droughts due to climate change, pollution and the introduction of alien species threaten the flora. Other threats come from farming (as a result of agricultural expansion and intensification), urbanization and tourism.[12]

The cultivation of plants that give textile fibers (Cannabis sativa, Linum usitatissimum), the cultivation of sugar beet (Beta vulgaris), cereals, potatoes, orchards, vineyards and olive groves have almost replaced the natural vegetation.

The actions of man since Roman times have resulted in the destruction of most of the lowland forests and hills, the expansion of pastures, and the extinction of many species and in the introduction of exotic species which are then naturalized. For example, the Indian fig opuntia (Opuntia ficus-indica), is now common in the warmer parts of the Southern Italy. Also, the invasive false Acacia (Robinia) is widely spread.

Conservation[edit]

National and regional parks in Italy

Italy is a signatory to the Berne Convention on the Conservation of European Wildlife and Natural Habitats and the Habitats Directive both affording protection to Italian fauna and flora. National parks cover about 5% of the country,[13] while the total area protected by national parks, regional parks and nature reserves covers about 10.5% of the Italian territory,[14] to which must be added 12% of coasts protected by marine protected areas.[15]

Notable botanists[edit]

  • Arcangeli, Giovanni. Compendio della flora italiana. Torino: Loescher, 1882.
  • Cesati, Vincenzo de, Giovanni Passerini & Giuseppe Gibelli. Compendio della flora italiana. Vol. 1-35. Milano: Vallardi, 1868-1886.
  • Fiori, Adriano. Nuova flora analitica d'Italia. Vol. 1-2. Firenze: Ricci, 1923-1929.
  • Parlatore, Filippo & Teodoro Caruel. Flora italiana. Vol. 1-10. Firenze: Le Monnier, 1848-1896.
  • Sandro Pignatti. Flora d'Italia. Vol. 1-3. Bologna: Edagricole, 1982. ISBN 88-506-2449-2.
  • Sandro Pignatti; Riccardo Guarino; Marco La Rosa. Flora d'Italia, 2nd ed. Vol. 1-4. Bologna: Edagricole, Edizioni Agricole di New Business Media 2017-2019.

Herbaria[edit]

The following table includes herbaria located in Italy.

Herbarium of the Museo di Storia Naturale di Firenze
Name No. Specimens[16] Abbr. City Website
Museo di Storia Naturale di Firenze 3,650,000 FI Florence
Università degli Studi di Roma La Sapienza 1,120,000 RO Rome
Università degli Studi di Torino 1,000,000 TO Turin
Herbarium Mediterraneum Panormitanum 500,000 PAL Palermo [1]
Università degli Studi di Padova 300,000 PAD Padua
Università di Pisa 300,000 PI Pisa [2]
Museo civico di storia naturale di Verona 270,000 VER Verona
Università di Camerino 250,000 CAME Camerino
Università di Catania 200,000 CAT Catania [3]
Centro Studi Erbario Tropicale, Università degli Studi di Firenze 200,000 FT Florence
Museo Tridentino di Scienze Naturali 200,000 TR Trento [4]
Università degli Studi di Trieste 200,000 TSB Trieste
Università di Pavia 180,000 PAV Pavia
Università Degli Studi di Napoli Federico II 170,000 NAP Naples
Centro Ricerche Floristiche Marche 150,000 PESA Pesaro
Università di Bologna 130,000 BOLO Bologna [5]
Museo Friulano di Storia Naturale 130,000 MFU Udine
Università degli Studi di Roma Tre 118,000 URT Rome
Università di Sassari 100,000 SS Sassari
Civico Museo di Storia Naturale di Trieste 100,000 TSM Trieste
Università degli Studi di Cagliari 80,000 CAG Cagliari [6]
Università di Genova 75,000 GE Genoa
Università di Siena 75,000 SIENA Siena [7]
Università degli Studi di Milano 60,000 MI Milan [8]
Museo Civico di Storia Naturale di Genova 55,000 GDOR Genoa
Museo Civico di Rovereto 51,000 ROV Rovereto [9]
Museo Regionale di Scienze Naturali di Torino 50,000 MRSN Turin
Università degli Studi di Napoli 50,000 PORUN Portici

Database[edit]

The Department of Biology of the University of Trieste houses the National Data Bank for the Italian Flora and Vegetation.

Botanical gardens[edit]

The most important botanical gardens and arboretums in Italy are:[17]

Historic gardens[edit]

The gardens of Isola Bella, Stresa

The Italian garden is stylistically based on symmetry, axial geometry and on the principle of imposing order over nature. It influenced the history of gardening, especially French gardens and English gardens.[18] The Italian garden was influenced by Roman gardens and Italian Renaissance gardens. The most important historic gardens in Italy are:[19][20]

See also[edit]

References[edit]

  1. ^ a b "Il corbezzolo simbolo dell'Unità d'Italia. Una specie che resiste agli incendi" (in Italian). 3 October 2011. Retrieved 25 January 2016.
  2. ^ Pignatti,S.,1982 Flora d’Italia. Edagricole, Bologna, vol. 1-3, 1982
  3. ^ Riccardo Guarino, Sabina Addamiano, Marco La Rosa, Sandro Pignatti Flora Italiana Digitale:an interactive identification tool for the Flora of Italy
  4. ^ "La ricchezza della Biodiversità italiana" (in Italian). Retrieved 10 March 2022.
  5. ^ "Biodiversità" (in Italian). Retrieved 10 March 2022.
  6. ^ "Il clima in Italia" (in Italian). Retrieved 10 March 2022.
  7. ^ "La "nicchia ecologica" di Fonte Santa: storia di un microclima unico in Italia" (in Italian). Retrieved 10 March 2022.
  8. ^ Adriana Rigutti, Meteorologia, Giunti, p. 95, 2009.
  9. ^ Thomas A. Blair, Climatology: General and Regional, Prentice Hall pp. 131–132
  10. ^ Carlo Blasi, Giulia Capotorti, Daniela Smiraglia, Domenico Guida, Laura Zavattero, Barbara Mollo, Raffaella Frondoni, and Riccardo Copiz A thematic contribution to the National Biodiversity Strategy - The ecoregions of Italy
  11. ^ Lorenzo Peruzzi. Fabio Conti and Fabrizio Bartolucci An inventory of vascular plants endemic to Italy
  12. ^ Italy’s biodiversity at risk IUCN
  13. ^ "National Parks in Italy". Parks.it. 1995–2010. Archived from the original on 29 March 2010. Retrieved 15 March 2010.
  14. ^ "Regione e aree protette" (in Italian). Retrieved 11 January 2022.
  15. ^ "Le aree protette in Italia" (in Italian). Retrieved 2 March 2022.
  16. ^ Holmgren, P. K.; N. H. Holmgren (1998). Index Herbariorum: A global directory of public herbaria and associated staff. New York: New York Botanical Garden. Archived from the original on 28 December 2009. Retrieved 18 June 2008.
  17. ^ "17 orti botanici tra i più belli d'Italia" (in Italian). Retrieved 14 March 2022.
  18. ^ "Alla scoperta delle meraviglie del giardino all'italiana" (in Italian). Retrieved 28 March 2022.
  19. ^ "Top10: i giardini più belli d'Italia" (in Italian). Retrieved 15 March 2022.
  20. ^ "I 10 Giardini più belli d'Italia" (in Italian). Retrieved 15 March 2022.

Further reading[edit]

  • Tutin T.G. et al., 1964-1980. Flora Europaea, Cambridge University Press
  • Ansaldi M., Medda E., Plastino S., 1994. I fiori delle Apuane, Mauro Baroni & c. s.a.s., Viareggio
  • D. Aeschimann; K. Lauber; D. Martin Moser; J. P. Theurillat. Flora Alpina. Bologna, Zanichelli, 2004. ISBN 88-08-07159-6

External links[edit]