Capsicum has the highest diversity of shapes and is the most common and extensively grown of the chilli species. Although annuum means annual it is actually a perennial in areas where the temperature remains between 15 - 30C (60-85F) all year. Wild ancestors of this species are believed to have evolved in Southern Brazil and Bolivia but were cultivated by man around 6,100 years ago. In the UK this species has been classified as follows: the hot varieties are called chillies and the sweet varieties are called red or green peppers. But modern breeding has confused this with the introduction of hot Bell peppers and sweet Jalapenos.