When the tip of the developing bud emerges from the calyx and begins to grow, the flower stalk gradually curves down through 180o, to point vertically downward. Then as the bud grows the stalk again turns upwards through 90o until it is at right angles to the stem, at which point the fully developed flower opens.
當花蕾從花苞露出，花朵開始膨大發育，花梗漸漸朝下彎曲，一直低到一百八十度，花蕾再朝上伸長，與植株成九十度直角後，花蕾始發育完成而開花。