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Webster 1913 Edition

Noun.

One skilled in the knowledge of plants; a collector of, or dealer in, herbs, especially medicinal herbs.

Noun.

A person skilled in plants; one who makes collections of plants.

herbalist ‎(plural herbalists)

person who treats diseases by herbs

Chinese:
Mandarin: (in Traditional Chinese Medicine) 中醫師, 中医师 ‎(Zhōngyīshī), (in general) 草藥醫生, 草药医生 ‎(cǎoyào yīshēng)
Finnish: kasvisparantaja