Related Clues:

• Thousand __: Ventura County city
• London's ___ Park, near Epsom Downs
• Annual flat race run at Epsom for three-year-old fillies
• Durable wood sources
• They were once acorns
• Illinois and Iowa's trees
• Mighty hardwoods
• Trees with an English species
• Hardy trees
• Lucky acorns, eventually
• Stalwart trees