Campanula trachelium

Campanula trachelium
Nettle-leaved bellflower, Throatwort
Campanula gantelèe

Campanula is from Latin meaning "small bell". It is native to Denmark and England,now found southward through much of Europe into Africa.
The alternate name throatwort is derived from an old belief that C. trachelium is a cure for sore throat, and the species name trachelium refers to this old belief.
It is a perennial plant with one or more unbranched, often reddish, square-edged stems that are roughly hairy.

Bloom

Flora Batava, Christiaan Sepp illustration, 1849

Blossom.Lacoste.11.02.14 
The inflorescence is a spike with a few slightly nodding flowers. 
Each flower has five sepals which are fused, erect and hairy, and the five violet (or occasionally white) petals are fused into a bell that is hairy inside. 
There are five stamens and a pistil formed from three fused carpels. 

Leaf. Lacoste.11.02.14