Lime is a citrus fruit, which is typically round, green in color, 3–6 centimetres (1.2–2.4 in) in diameter, and contains acidic juice vesicles. Limes have higher contents of sugars and acids than lemons do.
It is difficult to identify exactly which species of fruit are called lime in different parts of the world because they hybridise readily. Therefore the majority of cultivated species are actually hybrids, most likely produced from the citron (Citrus medica), the mandarin orange (Citrus reticulata), the pomelo (Citrus maxima) and most commonly, the micrantha (Citrus micrantha).
Here is a list of the most widely known hybrids of lime:
- Australian limes (former Microcitrus and Eremocitrus)
- Australian desert lime (Citrus glauca)
- Australian finger lime (Citrus australasica)
- Australian lime (Citrus australis)
- Blood lime (red finger lime × (sweet orange × mandarin) )
- Kaffir lime (Citrus hystrix); a papeda relative, is one of three most widely produced limes globally.
- Key lime (Citrus × aurantifolia = Citrus micrantha × Citrus medica) is also one of three most widely produced limes globally.
- Musk lime (calamondin, Citrofortunella mitis), a kumquat × mandarin hybrid
- Persian lime (Citrus × latifolia) a key lime × lemon hybrid, is the single most widely produced lime globally, with Mexico being the largest producer.
- Rangpur lime (Mandarin lime, lemandarin, Citrus limonia), a mandarin orange × citron hybrid
- Spanish lime (Melicoccus bijugatus); not a citrus
- Sweet lime etc. (Citrus limetta, etc.); several distinct citrus hybrids
- Wild lime (Adelia ricinella); not a citrus
- Wild lime (Zanthoxylum fagara); not a citrus
- Limequat (lime × kumquat)