Agave shrevei

Lechuguilla

Rosette succulent

Yellow-green

Spring

Agave vivipara

Mezcal

Rosette succulent

 Yellow

Spring

Anisacanthus andersonii

Limita

Shrub

Red

Spring

Anisacanthus thurberi

Desert honeysuckle

Shrub

Orange-red

Spring

Antigonon leptopus

Queen's wreath

Perennial vine

Pink

Summer

Bougainvillea spectabilis

Bougainvillea

Cultivated woody vine

White/magenta bracts

Spring

Bouvardia ternifolia

Cigarrito

Shrub

Red

Summer

Caesalpinia pulcherrima

Red bird-of-paradise

Shrub

Red and Yellow

Summer

Carnegiea gigantea

Saguaro

Columnar cactus

White

Spring

Castilleja patriotica

Indian paintbrush

Perennial herb

Red-orange

Summer

Centaurea rothrockii

Madrean starthistle

Perennial herb

Purple and White

Summer

Fouquieria diguetii

Palo adán

Shrub

Red

Spring

Fouquieria macdougalii

Tree ocotillo

Tree

Red

Spring

Fouquieria splendens

Ocotillo

Shrub

Red

Spring

Havardia mexicana

Palo chino

Tree

White

Spring

Ipomoea bracteata

Wild jícama

Woody vine

Purple

Spring

Ipomopsis thurberi

Purple starflower

Perennial herb

Purple

Summer

Justicia californica

Chuparrosa

Shrub

Orange-red

Spring

Lobelia cardinalis

Cardinal flower

Perennial herb

Red

Summer

Lobelia laxiflora

Bellflower

Perennial herb

Red

Spring

Mandevilla foliosa

Hierba del piojo

Shrub

Yellow

Spring

Nicotiana glauca

Tree tobacco

Introduced shrub/tree

Greenish yellow

Summer

Pachycereus pringlei

Cardón

Columnar cactus

White

Spring

Prosopis glandulosa

Honey mesquite

Shrub/tree

Yellow

Spring

Salvia elegans

Pineapple sage

Subshrub

Red

Summer

Stachys coccinea

Texas betony

Perennial herb

Red or Pink

Summer

Tecomaria capensis

Cape honeysuckle

Cultivated perennial herb

Orange-red

Spring

Tropaeolium majus

Nasturtium

Cultivated perennial herb

Orange

Spring

Wislizenia refracta

Jackass clover

Subshrub

Yellow

Spring