Butia paraguayensis
Butia paraguayensis in the Cerro Miriñaque, Rivera, Uruguay.
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Arecales
Family: Arecaceae
Genus: Butia
Species:
B. paraguayensis
Binomial name
Butia paraguayensis
(Barb.Rodr.) L.H.Bailey [1936]
Synonyms[1]

Butia paraguayensis is a species of Butia palm tree found in the cerrado region of South America. Its natural range runs from Mato Grosso do Sul and São Paulo in southern Brazil through Paraguay to northern Argentina and Uruguay.[2][3] It was given the name dwarf yatay palm in English by 2000,[4] and it is locally known as yata'i in Guaraní in Paraguay,[5] or butiá-do-cerrado in Portuguese in Rio Grande do Sul, Brazil.[6]

Taxonomy

Many researchers have considered it a dwarf variety of Butia yatay.[7]

In 1916 Odoardo Beccari reduced Cocos paraguayensis to a variety of Butia yatay, yet at the same time he described a new species from San Ignacio, Misiones, Argentina, which he named B. pungens.[1][8]

In 1970 Sidney Fredrick Glassman moved this species, along with all other Butia, to Syagrus,[9] but in 1979 he changed his mind and moved everything back.[10]

In a 1979 review of the genus Butia by Glassman, he continued to distinguish B. pungens,[8] believing B. paraguayensis did not occur in Misiones province,[4] but since at least 1996 this taxon is now considered a synonym of B. paraguayensis.[11]

A population of Butia palms in Paraguay once known as B. dyerana was considered a synonym of B. yatay by Glassman,[12] but this population was reclassified as a synonym of B. paraguayensis by at least 1996, removing B. yatay from the flora of Paraguay.[13]

Distribution

In Paraguay this species is very common; it occurs in the departments of Amambay, Caaguazú, Caazapá, Canindeyú, Concepción, Cordillera, Guairá, Misiones, Ñeembucú, and San Pedro.[5][14] In Brazil it occurs in the states of Mato Grosso do Sul, Paraná, Rio Grande do Sul, and São Paulo.[3] Lorenzi et al. also reported a population in southeast Minas Gerais in 2004,[6] as did Noblick in 2010.[7] In Argentina it occurs in the provinces of Corrientes and Misiones (in San Ignacio).[2] In Uruguay it has historically been recorded as being native to the departments of Artigas and Rivera,[2] but the distribution has been severely reduced due to agricultural development and presently the species is restricted to a single population of 175 individuals located on private property on the Cerro del Miriñaque, a hill in the Rivera department (see pictures).[15]

Bauermann et al. investigated the possibility of using palm pollen, including this species, in palynology, in order to try to provide more detail about the ancient changes in habitat in the state Rio Grande do Sul in Brazil by tracking the changes in distribution and abundance of the palms, but were unable to provide much detail on the subject.[6]

Habitat

It grows in the cerrado (a type of savannah grassland) and pastures.[14] It occurs on well-drained, usually sandy soils.[5] In Rio Grande do Sul, Brazil, it is exclusively found growing on clayey (probably lateritic) soils.[6] It grows from 100 to 300m in altitude.[2]

Description

Butia paraguayensis on the Cerro Miriñaque, Rivera, Uruguay.

Butia paraguayensis is a short, always solitary-trunked palm usually forming a subterranean trunk -although great variability is shown with some specimens forming large trunks above ground up to 2m high.[5][7][16]

The 6 to 20 arched pinnate leaves[6] range from a glaucous to dark-green and the petiole margins are covered in fibres and a row of spines up to 4 cm long.[7]

In common with B. yatay with which it shares some of the same range, the female flowers are much larger than the male.[17]

Like all species of Butia studied, this species has relatively larger pollen grains than that of other genera of palm present in Rio Grande do Sul, Brazil. These grains are bilaterally symmetrical, oblate, monosulcate, and with the end piriform (pear-shaped). The surface is covered in minute 2μm-large reticulate patterns.[6]

The fruit are variable and may be shaped conical or ovoid, as well as being coloured green, purple, red, orange or yellow at maturity. The fruit are 3-4 x 2-3 cm, juicy, slightly fibrous, taste sweet-sour, with a persistent perianth base and 1-3 large nuts with homogeneous endosperm.[7]

Similar species

It is often confused with (immature) Butia yatay. B. yatay always has a trunk, and is taller, with much larger leaves and inflorescences. In the past it was seen as a synonym of that species.[5]

Ecology

It is well-adapted to the periodic wildfires of the cerrado.[5]

In the Mbaracayú Forest Nature Reserve the ferns Pleopeltis decumanum usually, and P. hirsutissima and Serpocaulon latipes on occasion, grow as epiphytes upon the trunks of this palm.[14] Orchids of the genus Catasetum grow here as well.[5]

The rare bird Caprimulgus candicans, the white-winged nightjar, appears to prefer open grassland with low density stands of these palms (campo sucio) as habitat.[18]

In Paraguay the fruit are a favourite food of the maned wolf, which may be an important seed disperser. Parrots and macaws also make use of the ripe fruit.[5]

Uses

In Paraguay the fruit and palm hearts are eaten by local tribal communities (Ava Chiripá, Aché, others). The leaves are also used to make hats and other handicrafts. The unripe, green fruit are believed to be useful for combating intestinal worms.[5] In Paraguay the nuts are reputed to be of good use as fish bait.[16][19]

The fruit are not considered edible in Argentina.[16]

In Uruguay the single remaining, picturesque population has some ecotourism value.[15]

This species is sometimes, be it rarely, cultivated (in Argentina, England, California).[19][20] It is advised to plant the palms in full sunlight. It is said to take -11 °C, but should be protected at -4 °C in the Netherlands.[21]

Conservation

In Uruguay this species is now very rare (175 plants on a single hill) due to habitat loss due to agricultural activities such as cattle ranching and forestry (pulpwood plantations of eucalyptus). Sheep and cattle eat the seedlings, preventing recruitment.[15] As of 2017, like all four species of Butia native to Uruguay, it is protected by law. Adult palms may not be felled or moved without government permission.

References

  1. 1 2 Govaerts, R. (2018). "World Checklist of Selected Plant Families". Royal Botanic Gardens, Kew. Retrieved 17 September 2018.
  2. 1 2 3 4 "Flora del Conosur" (in Spanish). Instituto de Botánica Darwinion. Retrieved 17 September 2018.
  3. 1 2 Heiden, G.; Ellert-Pereira, P.E.; Eslabão, M.P. (2015). "Brazilian Flora Checklist - Butia paraguayensis (Barb.Rodr.) L.H.Bailey". Butia in Lista de Espécies da Flora do Brasil, Flora do Brasil 2020 under construction (in Portuguese). Jardim Botânico do Rio de Janeiro. Retrieved 17 September 2018.
  4. 1 2 "Butia paraguayensis". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 2018-09-18.
  5. 1 2 3 4 5 6 7 8 9 Jiménez, Belen; Knapp, Sandra (1998). "Palms of the Reserva Natural del Bosque Mbaracayú, Paraguay (Mbaracayú Natural Forest Reserve)" (PDF). Principes. 42 (2): 65–79. Retrieved 15 September 2018.
  6. 1 2 3 4 5 6 Bauermann, Soraia Girardi; Evaldt, Andréia Cardoso Pacheco; Zanchin, Janaína Rosana; de Loreto Bordignon, Sergio Augusto (June 2010). "Diferenciação polínica de Butia, Euterpe, Geonoma, Syagrus e Thritrinax e implicações paleoecológicas de Arecaceae para o Rio Grande do Sul". Iheringia, Série Botânica (in Portuguese). 65 (1): 35–46. ISSN 0073-4705. Retrieved 11 October 2018.
  7. 1 2 3 4 5 Soares, Kelen Pureza (2015). "Le genre Butia". Principes (in French). 1: 12–57. Retrieved 17 September 2018.
  8. 1 2 "Taxonomy - GRIN-Global Web v 1.10.3.6". Germplasm Resources Information Network (GRIN-Taxonomy). USDA, Agricultural Research Service, National Plant Germplasm System. 9 May 2011. Retrieved 18 September 2018.
  9. ↑ Glassman, Sidney Fredrick (1970). "A conspectus of the palm genus Butia Becc". Fieldiana. 32 (10): 150–157. doi:10.5962/bhl.title.2384. Retrieved 11 October 2018.
  10. ↑ Glassman, Sidney Fredrick (1979). "Re-evaluation of the Genus Butia With a Description of a New Species" (PDF). Principes. 23: 70–71. Retrieved 11 October 2018.
  11. ↑ Govaerts, R. (2018). "World Checklist of Selected Plant Families". Royal Botanic Gardens, Kew. Retrieved 18 September 2018.
  12. ↑ "Taxonomy - GRIN-Global Web v 1.10.3.6". Germplasm Resources Information Network (GRIN-Taxonomy). USDA, Agricultural Research Service, National Plant Germplasm System. 9 May 2011. Retrieved 18 September 2018.
  13. ↑ Govaerts, R. (2018). "World Checklist of Selected Plant Families". Royal Botanic Gardens, Kew. Retrieved 17 September 2018.
  14. 1 2 3 Peña-Chocarro, Maria C.; Espada-Mateos, Cristina; Vera, María; Céspedes, Gloria; Knapp, Sandra (18 November 2010). Updated checklist of vascular plants of the Mbaracayú Forest Nature Reserve (Reserva Natural del Bosque Mbaracayú), Paraguay (PDF). Vol. 12. p. 45. doi:10.11646/19088. ISBN 978-1-86977-602-2. ISSN 1179-3163. Retrieved 16 September 2018. {{cite book}}: |journal= ignored (help)
  15. 1 2 3 Gaiero, Paola; Mazzella, C.; Agostini, G.; Bertolazzi, S.; Rossato, M. (March 2011). "Genetic diversity among endangered Uruguayan populations of Butia Becc. species based on ISSR". Plant Systematics and Evolution. 292 (1–2): 105–116. doi:10.1007/s00606-010-0412-0. S2CID 30023595. Retrieved 18 September 2018.
  16. 1 2 3 Vera, Gaston Torres (11 November 2013). "Butia paraguayensis - Pacsoa". PACSOA Palms and Cycads wiki. Palm & Cycad Society of Australia Inc. Retrieved 17 September 2018.
  17. ↑ "Butia paraguayensis". Archived from the original on 2009-11-09. Retrieved 2010-08-13.
  18. ↑ Clay, Rob P.; Lanús, Bernabé López; Tobias, Joe A.; Lowen, James C.; Barnett, Juan Mazar (2000). "The Display of the White-winged Nightjar". Journal of Field Ornithology. 71 (4): 619–626. doi:10.1648/0273-8570-71.4.619. S2CID 85987094.
  19. 1 2 "Butia paraguayensis". Palmpedia - Palm Grower's Guide. 19 October 2017. Retrieved 18 September 2018.
  20. ↑ Stein, Geoff (31 July 2015). "Butia paraguayensis". Palms For California. Palmpedia. Retrieved 18 September 2018.
  21. ↑ Wagelaar, Edwin (31 December 2017). "Het geslacht Butia". Palmexotica (in Dutch). Retrieved 3 October 2018.
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