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UBC Herbarium. Year: 2014.   cc-by-nc-sa-3.0

Sonchus asper (spiny sowthistle) is a herbaceous species of plant in the family Asteraceae, with a self-supporting growth habit. It has simple, broad leaves. Flowers are visited by Orange Sulphur, Dainty Sulphur, and Monarch. It is a photoautotroph.

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EOL has data for 29 attributes, including:

Known occurrences, collected specimens and observations of spiny sowthistle