Grapefruit
The scientific name would be Citrus paradisi x reticulata.
Citrus x paradisi the x signifies that grapefruit is hydrid between two species. (the Orange and Pomelo)
Citrus x paradisi. All grapefruit are one species; the various colors come from the different cultivars.
Yes, the grapefruit (Citrus x paradisi) has other common names.Specifically, the grapefruit first was known as forbidden fruit of the Caribbean. It also was called shaddock, little shaddock and smaller shaddock. These latter names relate to its similarity to the pomelo (Citrus medica), which was introduced into the Caribbean by eighteenth-century sea Captain Shaddock. The grapefruit was considered to be a spontaneous sport of the pomelo. It was only in the twentieth century that it was recognized as the accidental hybrid of the pomelo and the sweet orange (Citrus x sinensis).
'Calamondin' is a common name of 'Citrus x microcarpa'. Other common names among English language speakers are acid, calamondin, Chinese or Panama orange. The shrub or small tree is native to southeast Asia. It particularly is popular among cultivators in the Philippines. There, its common name is Calamansi.
Citrus tangerina.
Citrus x limon - often used as Citrus limon (L.) Burm.(maltawildplants.com)
Pompelmo is an Italian equivalent of the English word "grapefruit" (Citrus x paradisi).Specifically, the word is a noun in its singular form. It may be preceded by the masculine singular definite article il("the"). The pronunciation will be "pom-PEL-mo" in Italian.
That the fruit exhibits a grape-like growth pattern is the reason why the grapefruit (Citrus x paradisi) is so called.Specifically, the grapefruit grows on a tree. The matured fruit hangs for plucking from the side of a branch. But unlike the apple hanging down all by itself on one stem, the grapefruit reminds pluckers and viewers of grapes in its clustered patterning of growth on the tree.
The scientific name would be Citrus x Meyeri.
If "dwarf lemon" isn't the common name, I can't imagine what would be. It's certainly not a scientific name, which would probably be Citrus medica x C. maxima.Citrus fruits are kind of unusual in that they are very, very cross-fertile and most commercially important citrus fruits are not distinct species but rather a cross between two (or more) of the original four (or thereabouts) ancestral species.
It is citrus x limon. The x denotes a hybrid.