原產美洲，傳入中國後廣泛栽培。
圖像驗證:/i？tn = baiduimage & ampct=201326592。cl = 2 & amplm=-1。fr = & ampsf=1。fmq = & amppv = & ampic=0。z = & ampse = 1 & amp；showtab = 0 & ampfb = 0 & amp寬度= & amp高度= & ampface = 0 & ampistype = 2 & ampword = % B4 % CC % BB % b 1 & amp；s=0