Cortaderia is a genus of plants in the Poaceae or Poaceae of plants.
All current species included in the Cortaderia genus are native to South and Central America, ranging from the Patagonia of southern Southern Chile and Argentina, to Costa Rica.[ Barker, Nigel P. & Linder, Hans Peter 2010. Annals of the Missouri Botanical Garden 97(3): 343–344 in English with short Latin diagnosis]
Etymology
The common name
pampas grass, though strictly referring to
C. selloana, is frequently applied to all species in the genus, as well as the five former members reclassied into the genus Austroderia (sometimes also to species of
Erianthus and
Saccharum ravennae). The name of the genus is derived from the Argentine Spanish word
cortadera, which in turn refers to the sharp serrations on the leaves.
and
C. rudiuscula produce copious seed asexually.
Description
Cortaderia species are perennial grasses, characterised by robust culms and feathery inflorescent plumes held high above the foliage.Some species are relatively short, forming rounded hedgehog-like clumps less than 0.5 m tall, but many species, including
Cortaderia selloana and
Cortaderia jubata form wide tussocks, up to 4 m tall. Rhizomes or stolons are rare but some species, particularly the taller species, can form tussocks almost as wide as their height.
[GrassBase - The Online World Grass Flora. Clayton, W.D., Vorontsova, M.S., Harman, K.T. and Williamson, H. (2006 onwards). GrassBase - The Online World Grass Flora.]
Across South America, the genus is a major component of the C3 temperate grasslands, from Tierra del Fuego in the far south, north to Venezuela (with some species extending to Costa Rica). They can be found from the Serro do Mar Atlantic coastal mountains near Rio de Janeiro to the Andes in Ecuador. At the southern extreme, species naturally grow at sea level, and in the Andes, certain species can be found growing up to 4500 m at the equator, where they make up a major component of paramo habitat.
Cultivation
Horticulture
Several species of Cortaderia have been extensively planted in gardens or cultivated landscapes around the world, particularly
Cortaderia selloana, having been planted as an ornamental garden plant outside of South America since the 19th century.
Many varieties or selections of Cortaderia selloana are or have been available, including variegated, silver leaved and dwarf varieties. The following varieties have received an Award of Garden Merit (AGM) by the Royal Horticultural Society (RHS): 'Silver Feather',
Non-ornamental uses
Cortaderia jubata, and to a lesser extent
Cortaderia selloana, can be used as green forage during dry summer months being able to be grazed to 30-50cm of the plant's base and be used as a substitute for hay, with plants having been used in the past for forage in New Zealand and California.
[Lemon, P.E. and P. Taylor. 1949. Pampas grass in southern California. Soil Conservation 14:255-257.][Pleasants, A.B. and P.H. Whitehead. 1977. Pampas grass as winter feed. New Zealand J. Agric. 135(1):2-3] Both species have also been used as a means of erosion control and planted as a windbreak and to provide shelter.
As invasive species
Cortaderia selloana and
Cortaderia jubata are considered invasive species in several disjunct parts of the world, capable of forming dense, often impenetrable, stands, and can damage grazing lands, interfere with afforested areas, affect visibility on roads and hinder access to certain natural areas, such as the margins of streams.
In parts of the world with high forest or bush fire risk, the build up and slow decomposition of leaf litter and standing dead leaves produce large amounts of flammable material and increase fire-related hazards.
In regions where either species is considered invasive, plants are able to rapidly colonize areas, including grassland plains, dunes, sparse shrublands and riverine habitats, particularly those that have been disturbed or altered by humans in the past, such as disused farmland or afforested land.
Cortaderia selloana is considered invasive on the Atlantic Europe of Europe across an 'Atlantic arc' ranging from Portugal to France, particularly in the Cantabria of Spain.[Lambrinos JG, 2001. The expansion history of a sexual and asexual species of Cortaderia in California, USA. Journal of Ecology (Oxford), 89(1):88-98.] It also occurs in many Micronesian islands, South Africa and Hawaiian islands, being classed as a noxious species in New Zealand and some states of Australia.[Mgidi TN, Maitre DC Le, Schonegevel L, Nel JL, Rouget M, Richardson DM, 2007. Alien plant invasions - incorporating emerging invaders in regional prioritization: a pragmatic approach for Southern Africa. Journal of Environmental Management, 84:173-187.]
Cordateria jubata, has similarly escaped from cultivation and become problematic especially in Australia, South Africa, New Zealand and parts of the United States. C. jubata is listed as a noxious weed in California, Hawaii and Oregon, and as a grade 1 invasive species in South Africa.
List of Cortaderia species
- Currently accepted species
-
Cortaderia araucana Stapf - Chile, Argentina
-
Cortaderia atacamensis (Phil.) Pilg. - Chile, Argentina, Bolivia
-
Cortaderia bifida Pilg. - Costa Rica, Panama, Venezuela, Colombia, Ecuador, Peru, Bolivia
-
Cortaderia boliviensis M.Lyle - Bolivia
-
Cortaderia columbiana (Pilg.) Pilg. - Venezuela, Colombia
-
Cortaderia hapalotricha (Pilg.) Conert - Costa Rica, Panama, Venezuela, Colombia, Ecuador, Peru, Bolivia
-
Cortaderia hieronymi (Kuntze) N.P.Barker & H.P.Linder - Bolivia, Peru, Argentina
-
Cortaderia jubata (Lemoine ex Carrière) Stapf – Andean pampas grass - Andes of Colombia, Ecuador, Peru, Bolivia, Argentina; naturalized in Australia, New Zealand, South Africa, Oregon, California, Hawaii
-
Cortaderia modesta (Döll) Hack. ex Dusén - southern Brazil
-
Cortaderia nitida (Kunth) Pilg. - Costa Rica, Venezuela, Colombia, Ecuador, Peru
-
Cortaderia peruviana (Hitchc.) N.P.Barker & H.P.Linder - Ecuador, Peru, Bolivia
-
Cortaderia pilosa (d'Urv.) Hack. - Chile, Argentina, Falkland Islands
-
Cortaderia planifolia Swallen - Colombia, Peru
-
Cortaderia pungens Swallen - Colombia, Peru, Venezuela
-
Cortaderia roraimensis (N.E.Br.) Pilg. - Guyana, Venezuela, Colombia, northwestern Brazil
-
Cortaderia rudiuscula Stapf - Andes of Chile, Argentina, Peru, Bolivia
-
Cortaderia selloana (Schult. & Schult.f.) Asch. & Graebn. – pampas grass - Chile, Argentina, Paraguay, Uruguay, Bolivia; naturalized in parts of northern South America, Mesoamerica, West Indies, southern USA, Australia, New Zealand, Mediterranean Basin, etc.
-
Cortaderia sericantha (Steud.) Hitchc. - Colombia, Peru
-
Cortaderia speciosa (Nees) Stapf - Chile, Argentina, Bolivia
-
Cortaderia vaginata Swallen - southern Brazil
- Formerly included species
see
Austroderia Chionochloa Chusquea Phragmites
External links
