Photos from the past couple days

Alexis and I were surprised by a newly blooming batch of wild sunflowers in the Riverway.

I noticed this house on Market street in Brighton on my way to a workshop and felt compelled to photograph it.

New greenhouses being built at Waltham Community Farms.

Elsewhere in Waltham, just off of busy Main street, some pavement ants* get ready for a major change.
*my previous identification of this ant is under some question. any expert opinion is welcome!
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Hopefully the frost will help some, but these are hardy weeds.
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i agree with the above comments, by the way; that looks like jerusalem artichoke to me too. there were a couple of them for sale at the plant sale up here yesterday, along with dooryard violets (see icon) and some other things i tend to think of as weedy (though certainly pretty).