Trifolieae and related seeds from archaeological contexts: problems in identification

Abstract

Small legume seeds are commonly recovered from Epipalaeolithic and Early Neolithic sites in north Africa and south-west Asia, often as a high proportion of the total plant remains. Their role is uncertain, but it is thought that small-seeded legumes may once have been a human food resource. They are difficult to identify. The gross morphology and testa surface micromorphology have been investigated in fresh seeds of members of the tribe Trifolieae and some related tribes in the same subfamily Faboideae. The separation of the four genera Medicago, Melilotus, Trifolium, and Trigonella has been attempted by multivariate analysis of seed characters that can be seen in experimentally charred seed specimens. The characters used have also been observed in well-preserved ancient charred small legume seeds, and so can be readily used for the purpose of identification. Although identification to the level of species is rarely possible, identification to generic level could provide information useful for the interpretation of this category of ancient plant remains.