In The Garden: Ferny looking plant

Looks sort of like a fern but not. Dime for scale.

 

Probably a carrot family weed of the general character of poison hemlock - but not exactly that one.

 

Can I make suggestions and the experts shoot them down if they're wrong?

Could it be Anthriscus sylvestris?

 

Regarding the USDA map (http://plants.usda.gov/core/profile?symbol=ANSY), it is not listed in California. And the leaflet edge shape looks somewhat different.

 

Perhaps some species of Lomatium?

 

Myrrhis odorata?

 

Not in California, either.

 

Not listed as growing in the wild, as I understand. That doesn't mean the plant can't be growing in the garden, if someone for some reason planted it there?

 

How about Phacelia tanacetifolia?

 

Yeah there's lacy phacelia all around it that we planted as a cover crop experiment, but I'm talking about the larger plant in the middle. It's obviously different from the lacy phacelia.