A MONOGRAPH OF NUPHAR (NYMPHAEACEAE)

摘要

The genus Nuphar (Nymphaeaceae) is described to include 11species native to fresh waters of the Northern Hemisphere. This assessment utilizedmorphometric analyses, cladistic analyses, evaluation of randomly amplifiedpolymorphic DNA, and seed and pollen fertility estimations. Evolutionaryreconstructions position the genus at the base of the family, most closely allied toBarclaya. Comprehensive cladistic analyses of morphological and molecular datahave permitted a general phylogenetic interpretation of the genus. Two majorevolutionary lineages are evident and recognized taxonomically at the section level.One (sect. Nuphar) includes N. lutea, N. X spenneriana, N. japonica, and N. Xsaijoensis, with an ultimate branch involving N. pumila and N. microphylla. Theother lineage (sect. Astylus) includes N. polysepala, N. X rubrodisca, N. variegata,N. sagittifolia, and N. advena. All studies illustrate high morphological variabilityand close relationships of species within each section. The biology of Nuphar issummarized and a complete taxonomic treatment is presented.