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Last week Mark Goff, an alert reader with a deep knowledge of botany and herblore, informed me of a mistake in my column concerning the bitter vetch (Vicia ervilia). Apparently a second plant goes by this common name and I accidentally reported on it as though it was Vicia ervilia. This second bitter vetch is Lathyrus linifolius, aka the “heath pea” (which is the name I’m going to use for it here on out). I have edited my earlier article and purged it of information and photos of the heath pea. Suffice to say, Vicia ervilia is indeed the Neolithic founder crop known for its bitterness. Please note that the seeds of Vicia ervilia are edible only if prepared properly (not that I imagine anyone running out to feast on the ancient legume). Vicia ervilia must be blanched and the water must be then be dumped out over and over again and again to ensure that the final dish is not toxic.
The heath pea (Lathyrus linifolius) is a fascinating plant in its own right. Native to the Highlands of Scotland it is a delicate fern-like plant with purple flowers. I had used photos of its lovely flowers in the Vicia ervilia article. I have replaced those images–and now I get to show the pretty heath pea once again (properly labeled this time). The heath pea produces a bitter tuber in its roots which was apparently consumed by higlanders in times of scarcity and famine to suppress hunger. Charles II is said to have given it to his mistress Nell Gwyn to help her lose weight (although I make it a practice not to believe everything I read about the restoration court). Mark Goff, who is brave as well as learned, reports that he has been eating the tubers and has noticed no side effects other than weight loss. Since obesity and weight-related health problems are becoming more pervasive in today’s world, contemporary scientists are studying the plant and analytically assessing the claims about it. Contemporary business people are close behind, trying to determine if they can make a fortune from Scottish weight-loss tubers.
Whatever the end results of theses studies and hopes, I wish to apologize for conflating the two plants and offer my thanks to Mr. Goff. All of this is a massive vindication for Linnaeus who established binomial nomenclature to avoid precisely this sort of misunderstanding. To wrap up this article, here is a statue of the great taxonomist which was given to my alma mater by the king of Sweden!