Senecio masatierrae   (Pelser)


 
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Large-headed Robinsonia
(Senecio masatierrae)

 
syn. Robinsonia macrocephala (Decaisne), Symphyochaeta macrocephala (Decaisne)

 
distribution:

Chile: Isla Robinsón Crusoe / Juan Fernández Islands

 
local name:

Incensio (Spanish)

 
size: 3 - 5 m (height)

extinction date: last seen in 1989

 
The plants of this species were small, hulking treelets measuring up to 5 m, but most reached only some 2 m in height.

The last specimens of this species were found in the year 1989 on the cliffs near Puerto Francés, since then no trace of this species has been found again.

This species seems to have been already rare when it was first discovered and described.

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The genus Robinsonia is now included in the genus Senecio, therefore several species had to be renamed with new species names.

 
 
above:

Large-headed Robinsonia (Senecio masatierrae)


Photo from 'The Natural history of Juan Fernandez and Easter Island, edited by Carl Skottsberg. Vol. 2., Botany. Uppsala: Almqvist & Wiksells Boktryckeri, 1920-1953'

http://www.biodiversitylibrary.org
 
left:

Large-headed Robinsonia (Senecio masatierrae), weibliche Einzelblüten


Depiction from 'The Natural history of Juan Fernandez and Easter Island, edited by Carl Skottsberg. Vol. 2., Botany. Uppsala: Almqvist & Wiksells Boktryckeri, 1920-1953'

http://www.biodiversitylibrary.org

 
References:

- Marcia Ricci: Conservation status and ex situ cultivation efforts of endemic flora of the Juan Fernández Archipelago. Biodivers Conserv 15: 3111–3130. 2006
- Andrés Moreira-Muñoz; Mélica Muñoz-Schick: Classification, diversity, and distribution of Chilean Asteraceae: implications for biogeography and conservation. Diversity Distrib. 13: 818-828. 2007
- Pieter B. Pelser; Eric J. Tepe; Aaron H. Kennedy; Linda E. Watson: The fate of Robinsonia (Asteraceae): sunk in Senecio, but still monophyletic?. Phytotaxa 5: 31-46. 2010