Rosemary is a very pungent herb (it's a herb people tend to love or hate).  Often used to accompany lamb (great to rub leaves onto the outside of a joint).  Another great use is to use it's twigs as kebab skewers - works well on the BBQ.

 

Rosemary is a perennial but is not tolerant of extreme cold.  The flowers are usual mauve, however there are many variants.  Bushy growth to about 4 foot.