Narrow leaved Jersey tea

Otherwise known as Ceanothus ovalis (it says so on the back of the card).  I've had difficulty finding specific information about this species although Ceanothus americanus seems to be called New Jersey tea.  Does that mean they are the same thing, or closely related?

I'm not likely to find any around here because it seems to be native to North America.  It has been used as a substitute for tea which it resembles in appearance and taste when the leaves are dried. The root has medicinal properties.

I'm quite keen on herbal teas and at the moment I'm happily sipping a chamomile tea.  Eat your heart out, Peter Rabbit.