SOLVED: Another thorny weed

Mysore, India(Zone 10a)

This one is another beauty of a flower, but its fruit will turn out to be a thorny little ball as can be seen there. Getting a prick in the foot is as painful as we can imagine. What is it named?

Thumbnail by Dinu
Helsinki, Finland(Zone 4b)

Some kind of Potentilla?

Sodwana Bay KZN, South Africa

I think this one is Tribulus terrestris, family Zygophyllaceae, a spreading South African annual growing in warm areas.

Phoenix, AZ(Zone 9a)

That nasty thing grows here in Arizona, too. Punctures bicycle tires and bare feet. Ouch!

Mysore, India(Zone 10a)

Yes that is the one. Thanks Maddy. Ouch and Groan are the words to describe the experience!

Kearney, NE(Zone 5a)

Maddy is right. It is commonly known as Puncturevine in the midwest. It reseeds like crazy.

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