Yareta

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in Lauca National Park, Chile
Scientific classification Edit this classification
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Yareta or llareta (in Spanish), known scientifically as Azorella compacta, (historically Azorella yareta) is a velvety, chartreuse cushion plant in the family Apiaceae which is native to South America. It grows in the Puna grasslands of the Andes in Peru, Bolivia, northern Chile and western Argentina at altitudes between 3,200 and 5,250 metres (10,500 and 17,220 ft).[1][2]

The name comes from yarita in the Quechua language.

Description

File:YaretaSurface.jpg
Distribution of flowers

Yareta is an evergreen perennial with a low, mat-like shape and hemispherical growth form that grows to around 6 m (20 ft) in diameter.[3] The self-fertile, pink or lavender flowers are hermaphroditic and are primarily pollinated by small flies, bees, wasps, and moths.[4]

The plant prefers sandy, well-drained soils. It can grow in nutritionally poor soils that are acidic, neutral or basic (alkaline) at altitudes of up to 5,200 metres (17,100 ft).[2] Yareta is well-adapted to high insolation rates typical of the Andes highlands and cannot grow in shade. The plant's leaves grow into an extremely compact, dense mat that reduces heat and water loss.[5] This mat grows near the ground where air temperature is one or two degrees Celsius higher than the mean air temperature. This temperature difference is a result of the longwave radiation re-radiated by the soil surface, which is usually dark gray to black in the Puna.[5]

Yareta is estimated to grow approximately 1.5 centimetres (0.59 in) per year.[2] Many yaretas are estimated to be over 3,000 years old.[6] These oldest ones have been reported to grow as slowly as Page Template:Fraction/styles.css has no content.1⁄18 inch (1.4 millimeters) per year.[7] Its very slow growth makes the traditional practice of harvesting it for fuel highly unsustainable.[8]

References

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  1. ^ Page Module:Citation/CS1/styles.css has no content."Image of Azorella compacta". chileflora. Retrieved 28 October 2015.
  2. ^ a b c Page Module:Citation/CS1/styles.css has no content.Kleier, Catherine; Rundel, Philip W. (August 2004). "Microsite requirements, population structure and growth of the cushion plant Azorella compacta in the tropical Chilean Andes". Austral Ecology. 29 (4): 461–470. Bibcode:2004AusEc..29..461K. doi:10.1111/j.1442-9993.2004.01386.x.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Pugnaire, Francisco I.; Morillo, José A.; Rodríguez-Echeverría, Susana; Gaxiola, Aurora (February 2020). "Azorella compacta : survival champions in extreme, high-elevation environments". Ecosphere. 11 (2). Bibcode:2020Ecosp..11E3031P. doi:10.1002/ecs2.3031.
  4. ^ Page Module:Citation/CS1/styles.css has no content.López-Sepúlveda, Patricio; Takayama, Koji; Greimler, Josef; Crawford, Daniel J.; Peñailillo, Patricio; Baeza, Marcelo; Ruiz, Eduardo; Kohl, Gudrun; Tremetsberger, Karin; Gatica, Alejandro; Letelier, Luis; Novoa, Patricio; Novak, Johannes; Stuessy, Tod F. (2014-10-08). "Progressive migration and anagenesis in Drimys confertifolia of the Juan Fernández Archipelago, Chile". Journal of Plant Research. 128 (1): 73–90. doi:10.1007/s10265-014-0666-7. ISSN 0918-9440. PMC 4300435. PMID 25292282.
  5. ^ a b Page Module:Citation/CS1/styles.css has no content.Wickens, G. E. (April 1995). "Llareta (Azorella Compacta, Umbelliferae): A review". Economic Botany. 49 (2): 207–212. Bibcode:1995EcBot..49..207W. doi:10.1007/BF02862926. ISSN 0013-0001. S2CID 37079723.
  6. ^ Page Module:Citation/CS1/styles.css has no content.Stenger, Richard (2019-11-28). "The oldest living things on Earth". CNN Travel. Retrieved 2020-01-09.
  7. ^ Page Module:Citation/CS1/styles.css has no content.Ralph, Carol P. (March 1978). "Observations on Azorella compacta (Umbelliferae)". Biotropica. 10 (1): 62 plus photo p. 63. doi:10.2307/2388107. JSTOR 2388107.
  8. ^ Page Module:Citation/CS1/styles.css has no content."See the world's oldest organisms".

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