Third seed?

Yup. Third/Bird seed.
After the "Pot Plant" and the "Canary grass" came this; as yet incognito.  

Well; we didn't get either the torrential downpour, nor the near hurricane(s) the news seemed to be talking about farther down the map.  Just enough to give Bunkers Hill NHS Flag a good wave and 0.5" in the rain gauge between breakfast and tea-time; as I discovered, dodging the drops to shoot this exotic weed.
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Search is to Google© as Hoover© is to vacuum cleaner
A search thinks it might be:-
"Guizotia is a genus of African Herbs in the sunflower family.  They are often known as sunflecks.  The species G. abyssinica is occasionally found outside of cultivation in Europe, North America and Asia.
The closest relatives of Guizotia within the tribe Heliantheae  are not clear."