Greater Periwinkle on hedgebank, Somerset

Single flower with wedge-shaped petals

Close-up of hairy calyx lobes

Corolla tube pulled apart to show stylar collumn

and stamens 

Close-up of stylar column, stigmatic ring and

stylar plume

Close-up of stamens - angled white filaments

and hairy, beige anthers

View into corolla tube showing 5 anthers 

overlapping the stylar disc

Broad, oval leaves and erect stem

Shiny, opposite leaves

Vinca major var. oxyloba in West Dorset