Volume IIB covers all genera of hardy herbaceous perennials from E to F or Echeandia to Fritillaria. Highlights include a large number of described, different cultivars: 176 Echinacea, 229 Epimedium, 81 Erigeron, 53 Eupatorium, 101 hardy Euphorbia, 96 Farfugiium, 49 ornamental Festuca, and 32 Filipendulina. The series includes detailed, cultivar-specific descriptions, whenever possible the cultivar origns, identification tips, and internet links for the more and rare and new offerings. There is also considerable original research into literature, cultivar histories, breeding and genetics, nomenclature, and reviews of existing literature.