2. Purple sweet potato pigment was a natural anthocyanin pigment derived from root
tuber of purple sweet potato.
紫色甘薯色素是从紫色甘薯块根中浸提出来的一种天然食用花青素类色素。
3. This species is distinct in always having a globose
tuber, capitate inflorescences, and a narrow, smooth achene.
本种在有一球状的块茎,头状的花序和一狭窄,平滑的瘦果方面是独特的。