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Senecio inaequidens [Narrow-leaved Ragwort]


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Rørslett, B. 2013. Senecio inaequidens DC. (Asteraceae). Narrow-leaved Ragwort. Flowers photographed in visible and ultraviolet light. http://www.ultraviol...leaved-ragwort/

 

Senecio inaequidens DC.

NO: Boersvineblom

EN: Narrow-leaved Ragwort

 

A medium-sized perennial species, native to South Africa, Lesotho, and Swaziland, it recently has been introduced to European countries. Being poisonous it is a highly unwanted noxious weed, and measures have been implemented in Norway to control the populations.

 

The flower heads are fairly small and occur scattered in open corymbs. The foliage is dissected almost thread-like in appearance. The lower parts of the stems become wooden over time. Being an invasive introduced species, it occurs mainly in man-made habitats such as harbours, wastelands, road verges, and industrial areas, and from these spreading into nearby agricultural land and pastures where it poses a threat to grazing livestock.

 

Plants collected at Oslo harbour 11. Jul 2009.

 

SENE_INA_I09071159322_VIS.jpg

Image reference: SENE_INA_I09071159322_VIS.jpg

Visible light. Nikon D200, Coastal Optics 60 mm f/4 APO lens, SB-800 flash.

 

SENE_INA_I09071159326_UV.jpg

Image reference: SENE_INA_I09071159326_UV.jpg

Ultraviolet light. Nikon D200, Coastal Optics 60 mm f/4 APO lens, Baader U 2" (Venus) filter, SB-140 flash.

 

[Date published: 17 Jan 2013]

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