Clausena lansium

Clausena lansium, also known as wampee or wampi (from Cantonese 黃皮; 黄皮; wong⁴ pei^4-2; 'yellow skin'),^[1] is a species of strongly scented evergreen trees 3–8 m tall, in the family Rutaceae, native to southeast Asia.

Clausena lansium
Ripe Clausena lansium fruits
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Sapindales
Family:	Rutaceae
Genus:	Clausena
Species:	C. lansium
Binomial name
Clausena lansium (Lour.) Skeels
Synonyms
Clausena wampi (Blanco), Oliver. Clausena punctata (Sonn.), Rehd. & E.H. Wils

Its leaves are smooth and dark green. White flowers in late March are white, with four or five petals, about 3–4 mm in diameter. The fruit is oval, about 3 cm long and 2 cm in diameter, and contains two to five seeds that occupy ~40-50% of the fruit volume. The tree reaches a maximum height of 20 meters. It grows well in tropical or subtropical conditions, and is susceptible to cold. Wampee trees grow well in a wide range of soil, but will grow best in rich loam.^[2]

The wampee is cultivated for its fruit, which is grape-sized and fragrant. Its skin and seeds are often eaten alongside the pulp, much like kumquat. The tree is popular in China, Vietnam, the Philippines, Malaysia, and Indonesia. Less frequently, it is grown in India, Sri Lanka, and Queensland; occasionally, it is cultivated even in Florida and Hawaii.^[2]

It is grown extensively in the New Territories of Hong Kong, and is a popular fruit among the indigenous Hakka villagers.

Gallery

• 
  A hybrid, seedless wampee that is larger and juicier than the normal variety; however, it is still more sour than sweet.
• 
  Flowering Clausena lansium in Hong Kong
• 
  Unripe fruits on a Clausena lansium tree
• 
  Clausena lansium seeds - the scale on the left is 1 mm per division

References

1. Oxford English Dictionary, "wampee"
2. Morton, J. 1987. "Wampee". p. 197–198. In: Fruits of warm climates. Julia F. Morton, Miami, FL. via NewCROP, New Crop Resource Online Program, Center for New Crops and Plant Products, Purdue University.