| Family Name | Sapindaceae |
| Scientific name | Dimocarpus longan |
| Common name | Longan |
| Growth habit | Very sensitive to frost. Require sandy soil and temperature above 4.5。C |
| Leaf | Alternate leaves with 4 to 10 opposite leaflets. The shape is elliptic or lanceolate and blunt-tipped. They are leathery with a glossy-green color on the upper surface and grayish-green on the lower surface. New leave growth has a wine-color |
| Flower | Pale yellow flowers on upright terminal panicles. |
| Fruit | Round fruits with a thin, brown-colored inedible shell. The flesh of the fruit is translucent white, soft, and juicy. It surrounds a big, black seed. |
| More to learn | 可用作風景林和防護林，木材堅固耐久，根、干可以提烤膠。疏林砍伐，根幹經悶燒製成木炭，熱值高，味道佳，是碳烤與使用者的首選。 果實可生吃，也可以含殼烘烤成果乾稱為龍眼乾， 龍眼乾可以含殼保存，去殼去子核後可以保存更久，利於長年食用或藥用。 但龍眼是濕熱食物, 多食易滯氣，有上火發炎癥狀的時候不宜使用，龍眼辛溫助陽，孕婦食用用後易動血動胎。 |
| Properties | -a sweet flavour -Warming property |
| Treats | It energizes qi, nourishes the blood, heart, and spleen, and expels cold. It is often prescribed for general debility, insomnia, and nervous disorders. |
| Reference | Wikipedia 醫學百科 Lands of Wisdom World Crops Database |