Kalpi (fruit)

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'Kalpi' (citrus)
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Sapindales
Family: Rutaceae
Genus: Citrus
Species: C. × webberii
Binomial name
Citrus × webberii

Kalpi (Citrus x webberii) is a natural citrus hybrid native to Philippines and is today one of the most common lemons in Hawaii, and is sometimes called 'Malayan lemon'.[1][2]


The handsome tree is medium-sized, 5 to 10 meters tall. The acidic fruit is very juicy; they are used like lemons. Size is variable, depressed and globose, with 9 to 11 segments and very thin skin, yellowish when ripe.[3]


'Kalpi' is a papeda. It looks somewhat like the common Philippine mandarin orange and the native citrus macroptera.

It is named Webberii after Herbert John Webber, by his disciple, abbreviation author Peter Jansen Wester. It can also be referred to as Webberi.[4] The common name 'Kalpi' is from the Bicolano dialect.[3]

It was published as Citrus webberii Wester in 1915 in Philipp. Agric. Rev. 1915, viii.[5]


'Kalpi' grows in Luzon and Mindanao, in the Philippines.[3]


  1. ^ Lemons in Hawai‘i
  2. ^ Dania Katz. "Not So Sour: Lemons in Hawai'i". edible Hawaiian Islands Magazine. 
  3. ^ a b c Jorma Koskinen and Sylvain Jousse. "Citrus Pages / Papedas". free.fr. 
  4. ^ "Citrus × webberi Wester is an unresolved name". The Plant List. Retrieved 18 January 2017. 
  5. ^ "Rutaceae Citrus webberii Wester". International Plant Names Index (IPNI). Retrieved 18 January 2017. 

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