The Friday Quiz: Botanica Mysteriosa
In lieu of a warm-up rant, please see the post below for non-Quizly nattering.
Let's begin:
This substance is produced by a plants from the family Lamiaceae; its scientific name is Marrubium vulgare, although some other plants within the Lamiacaea are referred to by the same common name (also applied to the substance derived from it). Egyptian priests called it 'The Eye of Horus,' some believed it has a historic link to the celebration of Passover. It has been used to treat a variety of ailments in humans and animals; the botanist and astrologer Nicholas Culpeper said, of it, 'It helpeth to expectorate tough phlegm from the chest, being taken with the roots of Irris or Orris.... There is a syrup made of this plant which I would recommend as an excellent help to evacuate tough phlegm and cold rheum from the lungs of aged persons, especially those who are asthmatic and short winded.' You, however, probably encountered this substance in a different form.
What substance is derived from the Marrubium vulgare plant?
First correct answer posted to comments wins an interjection, set off by an exclamation point. No Googling or picking up words and phrases and clauses. Put those down. One guess per comment but oh the comments you'll comment!