Peter F. Yeo

1929 – 2020

• A hybrid of Mahonia siamensis
• A revision of the North American species of Euphrasia L. (Scrophulariaceae)
• Cultivars of Bergenia [Saxifragaceae] in the British Isles
• Euphrasia brevipila and E. borealis in the British Isles
• Further observations on Bergenia in cultivation
• Geranium procurrens (Geraniaceae)
• Some North American Eyebrights (Euphrasia)
• The breeding relationships of some European Euphrasiae
• The evolutionary significance of the speciation of Euphrasia in Europe
• The hybrid origin of some cultivated snowdrops (Galanthus-Amaryllidaceae)
• The identity of Erodium sebaceum Delile (Geraniaceae)
• Two new geranium species endemic to Madeira