Abstract
ABSTRACT Lessingianthus spinifolius is here described and illustrated as a new species of the tribe Vernonieae (Asteraceae) from Chapada dos Veadeiros, State of Goias, Brazil. The new species is thus far known only from the type locality. The characteristics that most differentiate L. spinifolius from congeners are: (i) leaf blade strongly revolute; and (ii) leaf blade with spines on the margins. The new species is similar to L. onopordioides due to both having a similarly shaped involucre and the involucre being eximbricate with lanceolate phyllaries. Taxonomic and ecological comments, a distribution map, conservation status assessment, and illustrations of the new species are provided. Additionally, Vernonia araneosa is resurrected from the synonymy of L. durus, and a new combination, L. araneosus based on V. araneosa, is proposed, a lectotype designated, and its affinities with L. durus discussed.
Highlights
The family Asteraceae has approximately 1,600 genera and 25,037 species grouped in 44 tribes, distributed around the globe except for Antarctica (Funk et al 2009; Panero et al 2014; Panero & Crozier 2016)
Vernonia araneosa is resurrected from the synonymy of L. durus, and a new combination, L. araneosus based on V. araneosa, is proposed, a lectotype designated, and its affinities with L. durus discussed
Vernonia araneosa is resurrected from the synonymy of L. durus, and a new combination, L. araneosus based on V. araneosa, is proposed, a lectotype is designated, and its affinities with L. durus are discussed
Summary
The family Asteraceae has approximately 1,600 genera and 25,037 species grouped in 44 tribes, distributed around the globe except for Antarctica (Funk et al 2009; Panero et al 2014; Panero & Crozier 2016). It is one of the most species-rich in Brazil, where it can be found 2,065 species grouped in 304 genera, and 27 tribes widely distributed throughout the territory according to Flora do Brasil 2020 (2017). The genus has more than 130 species distributed in South America, especially in Argentina and Brazil, in addition to one or two species in Colombia and Venezuela (Robinson 2007; Keeley & Robinson 2009). The genus Lessingianthus is distinctive from other genera of Vernonieae by having a combination of characters including capitula generally pedunculate, corolla lobes usually glandular, style with base usually cylindrical (without node), absence of glands in the cypsela wall, and type B pollen grains (Jones 1982; Robinson 1988; 1999; Angulo & Dematteis 2010; 2014). Vernonia araneosa is resurrected from the synonymy of L. durus, and a new combination, L. araneosus based on V. araneosa, is proposed, a lectotype is designated, and its affinities with L. durus are discussed
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