The Endemic Plants of Chile

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Senecio toconaoensis J. Calvo & A. Moreira

Place of Publication

Anales Jard. Bot. Madrid 76(2): 1 (2019)

Type citation

Chile, región de Antofagasta, El Loa, Toconao, cordón S de los cerros de La Pacana, 23°9′28″ S, 67°27′56″ W, 4880 m a.s.l., 4–III–2019, J. Calvo 7911 leg. (holo-: SGO; iso-: CONC, MA, Z). Figs. 1 and 2.


  • Calvo & Moreira-Muñoz (2019)

    Calvo, J and Moreira-Muñoz, A 2019. Contributions to the Andean Senecioneae (Compositae), part III: A new species of Senecio from northern Chile. Anales Del Jardín Botánico de Madrid, 76(2): 1-4




Desert and Andean desert

Distribution and habitat

Region Antofagasta, currently only known from the southern part of La Pacana hills, located in El Loa Province. It grows in extremely arid screes from the desertic ‘puna’ ecoregion, near the vegetation limit at elevations between 4800 and 5000 metres above sea level. The few associated species include: Menonvillea virens, Nototriche sp. Oriastrum polymallum and Senecio. puchei.


Perennial herb, with stems 3–8 cm long. Flowering in March

Key characteristics

This species might be confused with S. algens, in fact this new species was collected as S. algens. Senecio toconaoensis differs in having it stems below the ground, which usually bear remnants of old leaves and are white (vs. stems that are rather elongated ad lie on the ground). The achenes are with long silky hairs (vs. hairless). It can also be confused with. S. altoandinus but differs by having fine hairs and prostrate woody stems (Calvo & Moreria, 2019).