BALEE & MOORE: SIMILARITY AND VARIATION IN PLANT NAMES 213 importance of the plants designated by those words. The present study differs from that of Berlin et al. (1973) in several ways. First, we introduce comparable data on five languages of the same language family as opposed to two, yielding comparison of 10 pairs of languages instead of one. Second, the present study is organized according to botanical referents instead of indigenous plant words themselves. Whereas Berlin et al. (1973) generally compared folk generic names for botanical species held in common between the two Mayan groups and then counted pairs of similar words, we compare similar and dissimilar words in terms of the botanical species themselves. Third, the present study shows dissimilar as well as similar names for botanical species and all these names are glossed morphemically. As such, our data permit insights into patterns of nomenclature of plants and the relationship of these patterns to culture. Despite the differences, the findings of this study independently support the contention of Berlin et al. (1973) that some cultural process is involved in the similarity of plant words. We suggest, however, that the analysis of Berlin et al. (1973) may be further refined in terms of identifying the exact cultural and linguistic processes at work. ACKNOWLEDGEMENTS Earlier versions of this article were presented at the Annual Meeting of the Society of Ethnobiology (Gainesville, 1987), International Congress of Ethnobiology (Belem 1988), and at the Wenner-Gren Conference "Amazonian Synthesis" (Nova Friburgo 1989). Grateful acknowledgement is made to the Edward John Noble Foundation, Institute of Economic Botany (New York Botanical Garden), and the CNPq (National Council on Science and Technological Development) for funding of this research. We are indebted also to the CNPq, the Museu Paraense Emilio Goeldi, and the FUNAI (National Indian Foundation) for institutional support in Brazil. We sincerely thank the botanists who made expert determinations of many plants cited herein: P. Acevedo-Rodriguez, W. Anderson, R. Barneby, C.C. Berg, B. Boom, R. Callejas, L. Constance, D. Daly, A. Gentry, C. Jeffrey, J. Kallunki, R.J.M. Maas, A. Mennega, J. Mickel, J. Mitchell, M. Nee, G.T. Prance, J. Pruski, and C. Sastre. Several species were also determined by Manuel Cordeiro and Nelson A. Rosa, to whom grateful acknowledgement is made. Helpful comments on the substance of the paper were generously supplied by Aryon D. Rodrigues, Pierre and Francoise Grenand, Brent Berlin, and two anonymous reviewers. We wish to express our most profound gratitude to the native speakers of Arawet6, Asurini, Ka'apor, Temb6, and WayApi, whose cooperation was indispensable. Whatever shortcomings this article may contain are attributable solely to the authors.