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The Herbs ought to be distilled when they are in their greatest vigor, and so ought the Flowers also.

Nicholas Culpeper (1666). “The English Physitian Enlarged: With Three Hundred, Sixty and Nine Medicines, Made of English Herbs that Were Not in Any Impression Untill This, Being an Astrologo-physical Discourse of the Vulgar Herbs of this Nation ...”, p.275
The Herbs ought to be distilled when they are in their greatest vigor, and so ought the Flowers also.