Habanero chili peppers are a variety of Capsicum chinense, a species know for producing the hottest pepper varieties on the planet. At maturity, the pepper can attain a maximum of 2.5 inches, with a wide variation in color, from shades of red to white or brown. While there are hotter peppers on record, such as the newly crowned Naga Viper at nearly 1.4 million Scoville units, they are few and nearly all are cultivars incorporating the same species. The Habanero most commonly grown is rated between 100,000 and 350,000 Scoville units