I love these 2 plants, alone and together. The red leaf is Iresine herbstii, will grow to 3 feet and looks best when occasionally pinched. The common name is Beefsteak plant but I know no one who calls it that. The white flower is Euphorbia "Diamond Frost", grows to 2 feet and flowers most of the year. They each like partial shade but will tolerate some sun. The Euphorbia is found in most nurseries, Iresine in independent ones.