estudo morfológico das unidades de dispersão e respectivas plantas de seis espécies invasoras da família cyperaceae morphological study of the dispersal units and their plants of six weeds of family cyperaceae

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ID: 194690
1983
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Abstract
O principal objetivo deste trabalho foi demonstrar a possibilidade da separação taxonômica das seis espécies estudadas, baseada nas características morfológicas externas das unidades de dispersão associadas com a forma, o tipo e a posição do embrião em relação ao tecido de reserva. Foram também usadas as estruturas associadas, das unidades de dispersão, as quais são da maior importância na classificação e identificação das espécies desta família. Foram feitas ilustrações e descrições das plantas e unidades de dispersão pertencentes às espécies de: Carex sororia Kunth., Cyperus ferax L.C. Rich. , Eleocharis genicu lata (L. ) Roem. et Schult., Eleochar is sellowiana Kunth., Fimbristylis autumnalis (L.) Roem. et Schult. e Fimbristylis diphylla (Retz.) Vahl. Além das descrições morfológicas foram feitas duas chaves dicotômicas para auxiliar na identificação das plantas e das unidades de dispersão das espécies estudadas. Para cada espécie foi levantado o nome vulgar, foi feita uma descrição quanto ao habitat, ao ciclo, afenologia, ao tipo de reprodução, a área de distribuiçã o geográfica, as culturas nas quais é considerada planta invasora, as sementes agrícolas onde a unidade de dispersão aparece como "impureza" e outras informações.
The main objective of this work was to show that it is possible to separate taxoconomicaly the six studied species, based on the morphological characteristics of the dispersal units associated with the shape, type and position of the embryo in relation to the storage tissue. In this study it have been also used the associated structures of the dispersal units which are very important in the classification and identification of the species of this family. The description, drawings and photographs o f the plants and their dispersal units were carried out in the following species : Carexsororia Kunth ., Cyperus ferax L. C. Ri ch ., Eleocharis geniculata (L.) Roem. et Schult ., Eleocharis sellowiana Ku nth ., Fimbri stylis autumnalis (L. ) Roem. et Schul t . e Fimbri stylis diphylla (Retz.) Vahl. Morphological description were also carried out through two taxonomical keys in order to help in the identification of the plants and of the units of dispersion of the species studied. Foreach species there were included the common names, and whenever as possible, a description of the habitat, life cycle, phenology, type of reproduction, geographical distribution and other informations were added , such as the crop in which it was considered as a weed, th e agricultural seeds in which the dispersal unit was found as a weed seed.
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groth1983plantaestudo Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;D. Groth
Journal anti-cancer agents in medicinal chemistry
Year 1983
DOI
10.1590/S0100-83581983000100005
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83581983000100005
Keywords
morphology weeds cyperaceae

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