Many-seeded Sanwort (Arenaria oligosperma)
The Many-seeded Sanwort was probably described in 1846 (the author is sometimes given as C. Gay).
The species was apparently endemic to a small area in the IV Coquimbo Region of northern Chile and appears to be lost or even extinct.
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References:
[1] Clodomiro Marticorena; Francisco A Squeo; Gina Arancio; Mélica Muñoz: Catálogo de la Flora Vascular de la IV Región de Coquimbo. Libro Rojo de la Flora Nativa y de los Sitios Prioritarios para su Conservación: Región de Coquimbo (F. A. Squeo, G. Arancio y J. R. Gutiérrez, Eds.) Ediciones Universidad de La Serena, La Serena, Chile 7: 105-142. 2001
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edited: 14.04.2019