刺桐是南方树木,刺桐花与大象、孔雀等组成了南国风情图;宋代时,福建泉州已有“刺桐城”之名。刺桐花春末开花,颜色深红,形如鹦鹉之嘴,有“鹦哥花”的别称。刺桐先叶后花,民间用以预测年成。赪桐亦产于南方,赪桐花的花冠、花梗均为红色,形如珊瑚;花期从夏天一直延续到秋天,有“百日红”的别称。油桐是经济树种。油桐又名荏桐,但是荏油未必就是桐油。桐油可以防水,可以与石灰制成粘合剂。宋代开始,桐油烟被广泛用于制墨业。 Erythrina is a tree in the South, Erythrina flowers and elephants, peacocks and other composition of the Southland style map; Song Dynasty, Quanzhou, Fujian already have “cinnabar city” in the name. Erythrrolytic flower spring blossom, dark red color, shaped like a parrot’s mouth, there is “Budgerigar ” another name. Thistle leaf after the first flower, folk to predict annual. Davidia involucrata is also produced in the South, Corolla flowers Corolla, peduncle are red, shaped like a coral; flowering from the summer until the fall, there is “another hundred days red” another name. Tung tree is an economic tree species. Tong tree, also known as Davidia involucrata, but the emu oil may not be tung oil. Tung oil can be waterproof, can be made with lime binder. Song Dynasty, tung oil smoke is widely used in the ink industry.