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Project Noah Nature School
Silybum marianum
The erect stem is tall, branched and furrowed but not spiny. The phyllaries under the flowers occur in many rows, with the outer row with spine-tipped lobes and apical spines. The fruit is a black achene with a white pappus.
In a field next to a roadway.
Spotted on Sep 6, 2012
Submitted on Sep 7, 2012
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