TLychees grow in large bunches. The skin is covered with small, blunt spikes. When unripe the skin is green, turning pinkish red when ripe. The flesh is white. Covering shiny, dark brown seeds. They are in season in April and May and are produced in greatest quantities in provinces of Chiang Mai, Chiang Rai, Phayao, Nan, Mae Hong Son, Lampang and Samut Sakhon. The litchi is rich in carbohydrate, calcium, phosphorus, iron and vitamin C. (The fruit is approximately 3 to 4 cm. in diameter.)