Scientific name: Capsicum frutescens
Common name: chili plant
Chilli plants love heat. They are closely related to capsicums/bell peppers and also related to tomatoes (they are in the same family, the solanaceae), but chillies prefer their growing conditions a lot hotter. Chilli seeds need 20°C/68°F to germinate, and it should be 30°C/86°F or more for the fruit to ripen.