Senecio albus, a new species of Senecio sect. Adamantina (Senecioneae – Asteraceae) with an emendment to the section

Abstract

Senecio albus J. N. Nakaj. & A. M. Teles, a new species of Senecio (Senecioneae -Asteraceae), is described from the National Park of Serra da Canastra, Minas Gerais, Brazil. The new species shares discoid capitula with S. gertii Zardini and is assigned to sect. Adamantina. This character is not in the circumscription for the sect. Adamantina and thus the description of the section is emended accordingly. A key to species of Senecio sect. Adamantina is provided.

A tribo Senecioneae (Asteraceae) em Minas Gerais, Brasil

“…Cabrera e Senecio (BFG 2015) e estudos taxonômicos com a tribo são escassos, podendo-se citar os trabalhos de Baker (1884), Cabrera (1957), Cabrera & Klein (1975), Matzenbacher (1998) e Teles & Stehmann (2011). A partir do trabalho de Cabrera (1957), novos táxons foram descritos (e.g., Zardini 1979;Robinson 1980;Matzenbacher 1996Matzenbacher , 2009Teles et al 2006Teles et al , 2009Teles & Meireles 2010;Teles & Freitas 2013), combinados (e.g., Nordenstam 1994Matzenbacher & Baptista 1997;Teles 2010) e acrescidos à lista da flora brasileira.…”

Senecio hortensiae (Senecioneae, Asteraceae): a new species from Espírito Santo, Brazil

“…Hind (1993) reported 67 species of Senecio for Brazil. However, new species (e.g., Cabrera 1959, Zardini 1979, Robinson 1980, Matzenbacher 1996, Hind 1999, Teles et al 2009, Matzenbacher 2009, Teles & Meireles 2010 and new combinations (e.g., Nordenstam 1978, Jeffrey 1992, Matzenbacher & Baptista 1997, Teles 2010) have been proposed.…”

Phytochemistry and quantification of polyphenols in extracts of the Asteraceae weeds from Diamantina, Minas Gerais state, Brazil

“…Asteraceae species are abundant in arid, semi-arid and high altitudes, such as campos rupestres, but few in tropical forests (Hind, 1993). The chemical-biological potential of the Asteraceae species may be lost by deforestation, and the fact that some of its species are endemic only aggravates the situation (Teles et al, 2009). …”

“…The finding of new compounds for pest control is important for agriculture in Brazil (Van Loon et al, 2000;Tavares et al, 2010a, b). Secondary metabolites such as the alkaloids nicotine from Nicotiana tabacum (Solanaceae), and piperine from Piper nigrum (Piperaceae); the rotenoid rotenone from Derris spp.…”