長春花有個有趣的英文俗名 – old maid老姑娘。名字印證了植物長年開花，太日常親切。大家其實都忽略她的美好。
native to madagascar, madagascar rosy periwinkles are also known as old maid. i believe it is because they are so common around the world in the warm areas and they flower and fruit whole year round.
i recommend you pay close attention to this lovely plant. immediately you will found it is no common lady.
the flowers are deep pink or white, comprising five petals spreading from a long, tubular throat. interestingly the pistil and stamen are all hiding inside the tube. the plant only entertains moths and butterflies with long tongue, as it has the ability to self-pollinate too.
the fruit also has its character, made up of two narrow, cylindrical follicles which house many grooved seeds.
the plant has ‘superpower’ too. it is known as the source of chemical compounds now used in the treatment of cancer.
長春花 madagascar rosy periwinkle (catharanthus roseus) – class: equisetopsida木賊綱 | subclass: magnoliidae | superorder: asteranae | order: gentianales 龍膽目 | family: apocynaceae夾竹桃科 | genus: catharanthus長春花屬 | species種: 長春花 c. roseus