Capsicum frutescens in the context of "Chili pepper"

Chili peppers, also spelled chile or chilli (from Classical Nahuatl chīlli [ˈt͡ʃiːlːi] ), are varieties of berry-fruit plants from the genus Capsicum, which are members of the nightshade family Solanaceae, cultivated for their pungency (spicy heat). They are used as a spice to add pungency in many cuisines. Capsaicin and the related capsaicinoids give chili peppers their intensity when ingested or applied topically. Chili peppers exhibit a range of heat and flavors. This diversity is the reason behind the availability of different types of chili powder, each offering its own taste and heat level.

Chili peppers originated in Central or South America and were first cultivated in Mexico. European explorers brought chili peppers back to the Old World in the late 16th century as part of the Columbian Exchange, which led to the cultivation of multiple varieties across the world for food and traditional medicine. Five Capsicum species have been widely cultivated: annuum, baccatum, chinense, frutescens, and pubescens.

Bird's eye chili or Thai chili (Thai: พริกขี้หนู, romanized: prik ki nu, lit. ''mouse-dropping chili'' owing to its shape) is a chili pepper variety from the species Capsicum annuum that is native to Mexico. Cultivated across Southeast Asia, it is used extensively in many Asian cuisines. It may be mistaken for a similar-looking chili derived from the species Capsicum frutescens, the cultivar siling labuyo. Capsicum frutescens fruits are generally smaller and characteristically point upwards. In the Marianas and Guam, these are often called boonie peppers or Doni Sali, which can be a term for regional wild (technically feral) varieties. The variation between different varieties can be significant for regional dishes or visuals, such as the Thai ornamental varieties.

This is a list of Capsicum cultivars belonging to the five major species of cultivated peppers (genus Capsicum): C. annuum, C. chinense, C. baccatum, C. frutescens, and C. pubescens. Due to the large and changing number of cultivars, and the variation of cultivar namings in different regions, this list only gives a few examples of the estimated 5000 pepper varieties that exist.

Capsicum chinense, commonly known as a "habanero-type pepper", is a species of chili pepper native to the Americas. C. chinense varieties are well known for their unique flavors and, in many cases, exceptional heat. The hottest peppers in the world are members of this species, with a Scoville heat unit score of 2.69 million measured in the C. chinense cultivar Pepper X in 2023.

Some taxonomists consider C. chinense to be within the species C. annuum, and they are a member of the C. annuum complex; however, C. chinense and C. annuum pepper plants can sometimes be distinguished by the number of flowers or fruit per node – two to five for C. chinense and one for C. annuum – though this method is not always accurate. The two species can also hybridize and generate inter-specific hybrids. C. frutescens may be the ancestor to the C. chinense species.