The calyx in specimens from Hainan is 15-veined, not 10-veined as described by Blume in the original description. This may be due to local variation within the species.

• 在来自海南的标本的花萼是15脉，象在原始描述里由布卢姆描述的那样的并非10脉。在内的对本地变化到期的这可能是是本种。