Nutritionally Dense Grain Related to Rhubarb

This page is the CodyCross answer for the clue below from Botanical Garden, Group 1438, Puzzle 2 (Arboretums).

Question is: Nutritionally Dense Grain Related to Rhubarb

and the answer is: BUCKWHEAT

Word Meaning:

BUCKWHEAT — An Asian plant, of the species Fagopyrum esculentum. [from 16th c.]

Definitions from Wiktionary.

Nutritionally Dense Grain Related To Rhubarb - Botanical Garden CodyCross Answers | CodyCross Solutions