Reproductive characteristics and adaptive evolution of pin and thrum flowers in endangered species, Primula merrilliana Genetic Diversity of the Endangered and Endemic Species, Primula merrilliana (Primulaceae), Revealed by RAPD Analysis Chemotaxonomic Relationship Between Murraya and Merrillia (Rutaceae) Chemical constituents in leaves of Actephila merrilliana (I) Chemical constituents in leaves of Actephila merrilliana (I) Effects of Population Size on Reproductive Success of the Endangered and Endemic Species Primula merrilliana Identification of effective pollinators of Primula merrilliana and effects of flower density and population size on pollination efficiency