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Two new records of Lactuca L. (Cichorieae, Asteraceae) from South America.
Swedish Museum of Natural History, Department of Botany.ORCID iD: 0000-0003-1822-5235
2016 (English)In: Brasilian Journal oof Biosciences, ISSN 1678-2343, Vol. 14, no 2, 117-123 p.Article in journal (Refereed) Published
Abstract [en]

Lactuca indica and Lactuca canadensis have been recorded for the first time in the Americas and in South America, respectively. Lactuca indica is native to Eastern Asia, and L. canadensis to North America. In Brazil, L. indica is used as a substitute for lettuce in some communities. The leaf shape in the Brazilian plants of the two species is less variable than in Asiatic or North American populations. This could possibly be a result of a single introduction to Brazil of each species. Both species are weeds, occurring in disturbed habitats in south and south-eastern Brazil. The two species are described, illustrated and their affinities are discussed. An identification key is provided to the six species of Lactuca (all introduced) in South America.

Abstract [pt]

Lactuca indica e Lactuca canadensis foram registradas pela primeira vez nas Américas e na América do Sul, respectivamente. Lactuca indica é nativa da Ásia Oriental e L. canadensis, da América do Norte. No Brasil, L. indica é usada como substituta à alface em algumas comunidades. A forma da folha nas plantas brasileiras das duas espécies é menos variável do que nas populações asiáticas ou norte-americanas. Isso possivelmente pode ser resultado de uma única introdução de cada espécie no Brasil. Ambas espécies são ruderais, ocorrendo em ambientes alterados nas regiões Sul e Sudeste do Brasil. As duas espécies são descritas, ilustradas e suas afinidades são discutidas. Uma chave de identificação é fornecida para as seis espécies de Lactuca (todas introduzidas) da América do Sul.

Place, publisher, year, edition, pages
2016. Vol. 14, no 2, 117-123 p.
Keyword [en]
Compositae, edible plant, lettuce, neotropics, Brazil
Keyword [pt]
Compositae, plantas comestíveis, alface, neotrópico, Brasil
National Category
Biological Systematics
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-1800OAI: oai:DiVA.org:nrm-1800DiVA: diva2:954118
Funder
Swedish Research Council
Available from: 2016-08-20 Created: 2016-08-20 Last updated: 2016-09-05Bibliographically approved

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http://www.ufrgs.br/seerbio/ojs/index.php/rbb/article/view/3519

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