<P> Most of the capsaicin in a pungent (hot) pepper is concentrated in blisters on the epidermis of the interior ribs (septa) that divide the chambers, or locules, of the fruit to which the seeds are attached . A study on capsaicin production in fruits of C. chinense showed that capsaicinoids are produced only in the epidermal cells of the interlocular septa of pungent fruits, that blister formation only occurs as a result of capsaicinoid accumulation, and that pungency and blister formation are controlled by a single locus, Pun1, for which there exist at least two recessive alleles that result in non-pungency of C. chinense fruits . </P> <P> The amount of capsaicin in hot peppers varies significantly among varieties, and is measured in Scoville heat units (SHU). The world's current hottest known pepper as rated in SHU is the' Carolina Reaper,' which had been measured at over 2,200,000 SHU . </P> <Ul> <Li> Capsicum annuum L . </Li> <Li> Capsicum baccatum L . </Li> <Li> Capsicum buforum Hunz . </Li> <Li> Capsicum campylopodium Sendtn . </Li> <Li> Capsicum cardenasii Heiser & P.G. Sm . </Li> <Li> Capsicum ceratocalyx M. Nee </Li> <Li> Capsicum chacoense Hunz . </Li> <Li> Capsicum chinense Jacq . </Li> <Li> Capsicum coccineum (Rusby) Hunz . </Li> <Li> Capsicum cornutum (Hiern) Hunz . </Li> <Li> Capsicum dimorphum (Miers) Kuntze </Li> <Li> Capsicum dusenii Bitter </Li> <Li> Capsicum eximium Hunz . </Li> <Li> Capsicum flexuosum Sendtn . </Li> <Li> Capsicum friburgense Bianch . & Barboza </Li> <Li> Capsicum frutescens L . </Li> <Li> Capsicum galapagoense Hunz . </Li> <Li> Capsicum geminifolium (Dammer) Hunz . </Li> <Li> Capsicum havanense Kunth </Li> <Li> Capsicum hookerianum (Miers) Kuntze </Li> <Li> Capsicum hunzikerianum Barboza & Bianch . </Li> <Li> Capsicum lanceolatum (Greenm .) C.V. Morton & Standl . </Li> <Li> Capsicum leptopodum (Dunal) Kuntze </Li> <Li> Capsicum lycianthoides Bitter </Li> <Li> Capsicum minutiflorum (Rusby) Hunz . </Li> <Li> Capsicum mirabile Mart . ex Sendtn . </Li> <Li> Capsicum mositicum Toledo </Li> <Li> Capsicum parvifolium Sendtn . </Li> <Li> Capsicum pereirae Barboza & Bianch . </Li> <Li> Capsicum pubescens Ruiz & Pav . </Li> <Li> Capsicum ramosissimum Witasek </Li> <Li> Capsicum recurvatum Witasek </Li> <Li> Capsicum rhomboideum (Dunal) Kuntze </Li> <Li> Capsicum schottianum Sendtn . </Li> <Li> Capsicum scolnikianum Hunz . </Li> <Li> Capsicum spina - alba (Dunal) Kuntze </Li> <Li> Capsicum stramoniifolium (Kunth) Standl . </Li> <Li> Capsicum tovarii Eshbaugh et al . </Li> <Li> Capsicum villosum Sendtn . </Li> </Ul> <Li> Capsicum annuum L . </Li>

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