Moth Letter "M" Nuthatch Letter "N" Eagle Letter "E" Rose Letter "R" Mountain Goat Letter "G" Trillium Letter "T" Iris Letter "I" Juniper Letter "J" Owl Letter "O" Squirrel Letter "S" Xeriscape Letter "X" “Xeriscape” is a landscaping term for a low-water garden with all-native plants. We thought it was far more interesting to use as “X” than the usual “Xylophone” or “X-Ray” in an ABC book.