Aridoamerica
Sonoran Desert
Middle America
chuparosa
Chihuahuan Desert
hooded skunk
Mephitis macroura
Southwest
southwestern United States
redshanks
mescal bean
Big Sur
Baja California
rainbow cactus
longroot
pine-barren sandwort
Arenaria caroliniana
Mojave
Mojave Desert
Mohave
Mohave Desert
Sierra Madre Oriental
Colorado Desert
Los Angeles Basin
ribbonwood
Southeast
southeastern United States
Oasisamerica
Lower California
Texas storksbill
White Sands
Baja California Peninsula
Erodium texanum
Tampa Bay
NM
Land of Enchantment
Cascade Range
Acanthocereus pentagonus
New Mexico
Trimorphodon lambda
N.M.
Painted Desert
Cascade Mountains
Acanthocereus tetragonus
Sonoran lyre snake
pitahaya
Cascades
pitahaya cactus
Tetzcoco
quail bush
Sierra Madre Occidental
white thistle
Gulf of California
Alta California
Campeche
quail brush
Atriplex lentiformis
southwestern
collared peccary
Tayassu angulatus
javelina
Guanajuato
Peccari angulatus
Californias
La Huasteca
Tayassu tajacu
Myrtillocactus
genus Myrtillocactus
Fouquieria
Gulf States
Veracruz
ocean pout
Patagonian Desert
Macrozoarces americanus
eastern redbud
Crotalus lepidus
Gulf Coast of the United States
Coahuila
genus Fouquieria
Mesoamerica
California hazelnut
Colorado
rock rattlesnake
San Marcos
Gulf of Tehuantepec
brittlebush
Cheilanthes alabamensis
Central America
Quintana Roo
smooth lip fern
desert bean
Alabama lip fern
Euphorbia antisyphilitica
black-stemmed spleenwort
black-stem spleenwort
candelilla