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SOLVED: Some kind of weed? Thorns and distinctive leaves

Boise, ID(Zone 6b)

My husband and I just started a new garden. Previously the area was covered in annual grass and assorted other weeds (purslane, spotted spurge, bindweed). We planted sunflowers, carrots and marigolds. This interesting plant came up in the line of marigolds. I've never seen anything like it before, and I don't just want to kill it. The leaves are similarly shaped with watermelons. It has lots of spines- along the stems, under the leaves, and on top of the leaves. Anybody know what it is?

This message was edited Aug 3, 2009 12:23 PM

Thumbnail by tmtresh
(Zone 7a)


Calgary, AB(Zone 3b)

Watermelon plants don't have thorns.
It's Solanum rostratum.

(Zone 7a)

Oh, duh. I didn't see that part.

Josephine, Arlington, TX(Zone 8a)

I agree with Solanum rostratum, we call it Buffalo Bur here in Texas, the flowers are very pretty.

Boise, ID(Zone 6b)

Great! Thank you! Now I have to decide what to do with it. According to the USDA website it's a noxious weed in Idaho. But it is very pretty.

Josephine, Arlington, TX(Zone 8a)

You could keep it potted as a conversation piece.

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