昙花的开花季节一般在6月～10月,开花的时间一般在晚上八九点钟以后,盛开的时间只有三四个小时,非常短促。昙花开放时,花筒慢慢翘起,将紫色的外衣慢慢打开,然后由20多片花瓣组成的、洁白如雪的大花朵就开放了。开放时花瓣和花蕊都在颤动,艳丽动人。可是三四个小时后,花冠闭合,花朵凋谢,真可谓“昙花一现”!那么,昙花为什么只能“一现”呢?原来,“昙花一 Epiphyllum flowering season is generally in June to October, the flowering time is generally at 89 o’clock in the evening after the blooming time only three or four hours, very short. Epiphyllum open, the cauldron slowly tilt, slowly open the purple coat, and then composed of more than 20 pieces of petals, snow white flowers open. Petals and stamens are fluttering when open, glamorous. But three or four hours later, the corolla closed, the flowers withered, really described as ”short-lived“! Then, why can only Epiphyllum ”?"?