昙花属热带森林中的附生性仙人掌植物,形态奇特,只有叶状枝而没有一般的叶子,花大而长,白色有香味。我国各地多作盆栽观赏。开花时间长短与当地气温有关,一般7～8月在21～22时开放,至翌日3～4时萎谢,开5～6个小时;9月下旬～10月开花,则多在20时左右开,至翌日4～5时谢,开8～9个小时。 Epiphyllum tropical forest in the epiphytic cactus plants, strange shape, only leafy branches and no general leaves, flowers large and long, white and fragrant. More potted plants around our country for viewing. The flowering time is related to the local temperature. Generally, it is open from 21 to 22 July from July to August, and fade from 3 to 4 o’clock the next day for 5 to 6 hours. In late September to October, flowering will start at about 20 o’clock , To thank the next 4 to 5 pm, open 8 to 9 hours.