Hawaiian Chili Pepper, Ni'oi, Capsicum frutescens There are numerous varieties of pepper plants given the botanical name Capsicum, however we grow the Hawaiian variety, known as Ni'oi. Hawaiian Chili Peppers grow on a medium sized bush. The peppers are small and numerous, ranging from green to yellow to orange, but only ripe when they are bright red. Extremely hot to touch and taste, these peppers warrant awareness!