Unidentified orbweaver

[urbpan]

  

She wouldn't hold still long enough for a very good picture, but I think whatever field markings we'd be looking for are there. 
I'd tentatively say she's an Araneus orbweaver.  My guide has this to say:  "Identification of Araneus spiders, to species, is surprisingly difficult.   Abdomen colors and patterns can vary dramatically even within species.  As with many spiders, exact IDs often come down to differences in microscopic body parts."

cross posted to urban_nature , and whats_that_bug