1. Old World aspen with a broad much-branched crown; northwestern Europe and Siberia to North Africa
   - quaking aspen, Populus tremula

Type of: aspen

• Ephedra sinica
• Ephedraceae
• ephedrine
• ephemera
• ephemeral
• ephemerality
• ephemeralness
• ephemerid
• Ephemerida
• Ephemeridae
• ephemeris
• ephemeris time
• ephemeron
• Ephemeroptera
• ephemeropteran
• Ephesian
• Ephesians
• Ephestia
• Ephestia elutella
• Ephesus
• Ephippidae
• Ephippiorhynchus
• Ephippiorhynchus senegalensis
• ephod
• ephor