In 1373 John Lelamour, a Hereford schoolmaster, compiled the text of what became known as the Lelamour Herbal. It describes the therapeutic properties of more than 200 plant species. The date of the manuscript is given in the explicit to the text, as is its supposed source, a translation of De viribus herbarum, a popular Latin poem in hexameters composed by "Macer Floridus," a pseudonym for a French physician from Meung-sur-Loire, Odo Magdunensis. However, textual, linguistic, graphological, and other evidence suggests that Macer's poem contributed only some of the material for the Herbal, which relied on several other sources and may not have dated solely from a compilation in 1373. The Lelamour Herbal is cited 132 times in the Oxford English Dictionary, and in many cases the words referred to in the citations illustrate the first recorded instances of their meanings, assuming a true date of compilation of 1373. Even if that assumption is wrong, the text is clearly important from a lexicographic point of view.