They appear to be Papaver somniferum.
From: The archaeobotany mailing list [[log in to unmask]] on behalf of Christin Jensen [[log in to unmask]]
Sent: 06 November 2014 20:17
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Subject: Papaver seeds
I wonder whether these seeds of Papaver may be identified to species level? They are found in the floor layer of a Bronze age house near Tromsö, Northern Norway (69 degrees North). Hopefully the quality of the photoes is good enough to see the pattern of more or less rectangular stripes (ribs) within the cells. I am very grateful to you for help with the identification. The size of the seeds is 1-1,3 mm.
Assoc. prof. in botany
University of Stavanger
Museum of Archaeology