Additions to the genus Lessingianthus (Asteraceae, Vernonieae) from South America

Abstract Two new species of Lessingianthus (Asteraceae: Vernonieae) are described and illustrated. One of these, L. foliosus Dematt., bears a resemblance to L. vepretorum, but can be separated from it by its linear leaves, that are lanate on the abaxial surface, and by its shorter internodes. The ot...

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Bibliographic Details
Published in:Rodriguésia 2010-06, Vol.61 (2), p.233-241
Main Authors: Dematteis, Massimiliano, Angulo, María Betiana
Format: Article
Language:English
Subjects:
Compositae
new combinations
new species
Vernonia
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Summary:Abstract Two new species of Lessingianthus (Asteraceae: Vernonieae) are described and illustrated. One of these, L. foliosus Dematt., bears a resemblance to L. vepretorum, but can be separated from it by its linear leaves, that are lanate on the abaxial surface, and by its shorter internodes. The other new species, L. lapinhensis Dematt., can be easily separated from L. brevifolius and other taxa of the genus by the combination of stems 8-18 cm tall, glabrous linear leaves and campanulate involucres. Thirteen other taxa previously described as Vernonia are transferred to the genus Lessingianthus and two lectotypes are designated here. Resumo Duas novas espécies de Lessingianthus (Asteraceae: Vernonieae) são descritas e ilustradas. Uma dessas espécies, L. foliosus Dematt., apresenta semelhança com L. vepretorum, mas diferencia-se dela pelas folhas lineares, lanosas na face abaxial e pelos entrenós mais curtos. A outra espécie, L. lapinhensis Dematt., pode ser distinguida facilmente de L. brevifolius e outros táxons do gênero pela combinação de caule 8-18 cm compr., folhas lineares, glabras e invólucro campanulado. Outros treze táxons descritos como Vernonia são transferidos para o gênero Lessingianthus e dois lectótipos são aqui designados.
ISSN:0370-6583
2175-7860
2175-7860
DOI:10.1590/2175-7860201061207