Una nueva especie de Leucheria (Asteraceae), endémica de Chile.

Abstract

Summary:A new species of Leucheria (Asteraceae), endemic to Chile. A new species of Leucheria Lag. (Asteraceae, Nassauvieae), L. meladensis Katinas, Crisci & A.E. Martic., with entire, elliptic, petiolate, scarcely pubescent leaves is described and illustrated. This would be the only species endemic to Reserva Nacional Bellotos del Melado, at 35º S, in Linares province of the Maule region, Chile. A key to the species of Leucheria that inhabit the Linares province is presented.

Capitulum compartmentalization in Leucheria (Nassauvieae): Insights into the evolution of Asteraceae inflorescence

“…This study is based on herbarium material of the 49 species of Leucheria (Crisci, 1976;Katinas & al., 2008bKatinas & al., , 2018. A list of the specimens studied is provided in Appendix 1.…”

“…A closer observation of the paleaceous phyllaries in Leucheria shows that their spatial orientation is more variable and complex than previously thought. In many cases, the inner phyllaries are perpendicular to the outer ones (Katinas & al., 2018) or are differently oriented in the same capitulum, and sometimes the outer phyllaries are also rotated. This promotes the division of the capitulum into subsections or compartments enclosing florets, a phenomenon that we call here "capitulum compartmentalization".…”

Figure 3 from: Lavandero N, Rosende B, Pérez MF (2020) Leucheria cantillanensis (Nassauvieae, Asteraceae), a new species endemic to Central Chile. PhytoKeys 169: 99-117. https://doi.org/10.3897/phytokeys.169.57532

“…The genus Leucheria comprises 49 species (Crisci 1976;Katinas et al 2008;Katinas et al 2018;Jara-Arancio et al 2019) distributed in Peru, Bolivia, Chile, and Argentina on the continent, plus the Falkland Islands. Most species are concentrated within the Patagonian-Andean and the Subantarctic phytogeographic domains (Cabrera and Willink 1973).…”

“…& Arn., Leucheria polyclados (J. Remy) Reiche). Since the most comprehensive revision of the genus (Crisci, 1976), at least two new species (Katinas et al 2008;Katinas et al 2018) and a new variety (Ratto et al 2014), which was later elevated to species level (Jara-Arancio et al 2019), have been described.…”