Common purslane (Portulaca oleracea, Portulacaceae), also known as little hogweed, is a common weed throughout North America. I frequently remove it from my garden (where these photos were taken), and I see it everywhere on the family farm.
The other day I noticed that purslane seems to be readily attacked by a leaf-mining sawfly (Schizocerella pilicornis, Argidae). The larvae get into the leaves where they safely eat away at the insides until they reach their adult stage. You can faintly see a larva of one of these insects inside the right edge of the leaf above. The same leaf, when held up against the setting sun, helps illuminate the larva inside:
I removed the larva to get a clear shot of it:
Apparently these larvae are quite damaging to purslane, but not enough to control the weed by themselves. I guess that means I’ll have to continue to pull purslane from my garden, although at least I now know I have a little bit of help.