It's just a flower. Scutellaria lateriflora. Blue Scullcap.
From the wiki page [link above]:
Scutellaria lateriflora has been found in a small-scale double blind, placebo-controlled study to have anxiety-reducing effects in 19 volunteers.
More than 295 chemical compounds have been isolated from Scutellaria, among them flavonoids and diterpenes. Studies show that Scutellaria and its active principles possess wide pharmacological actions, such as antitumor, anti-angiogenesis, hepatoprotective, antioxidant, anticonvulsant, antibacterial and antiviral activities.
We found a large stand of these at the end of our road. Sounds like they're pretty useful to have around. Plus, they're really pretty.