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

Type of: aspen

Encyclopedia: Populus tremula

• red sandalwood
• red sanders
• red sanderswood
• red saunders
• red scare
• Red Sea
• red setter
• red shrubby penstemon
• red silk cotton
• red silk-cotton tree
• red silver fir
• red siskin
• red snapper
• red sorrel
• red spider
• red spider mite
• red sprites
• honorable discharge
• honorable mention
• honorableness
• honorably
• honorarium
• honorary
• honorary degree
• honorary society