Wildflower Archive
Cloudless sulphur (Phoebis sennae)
Laura Gaudette · CC BY (iNaturalist)

Pollinator

Cloudless sulphur

Phoebis sennae

A big, brilliant lemon-yellow butterfly that streams north each summer.

Family
Pieridae (whites and sulphurs)
Wingspan
2.25 to 3.1 in (5.7 to 7.8 cm)
Flight season
Much of the year; migrates north
Range
Southern United States, wandering north
Caterpillar food
Partridge pea and sennas (Cassia)
Conservation
Secure and widespread

The cloudless sulphur is a large, clear lemon-yellow butterfly, the brightest of North America's sulphurs, sailing fast and high through gardens and open country.

A strong migrant, it pushes north out of the South each summer, sometimes in loose streams, and drifts back in fall. It favors long, tubular red and pink flowers that shorter-tongued butterflies cannot reach.

Cloudless sulphur caterpillar
The green caterpillar feeds on partridge pea and sennas. CC0 · iNaturalist

Caterpillars feed on partridge pea and sennas. Plant a native partridge pea for the caterpillars and deep nectar flowers for the adults.

Plants for the cloudless sulphur

2 caterpillar host plants and 26 documented nectar plants. Pick a role, then narrow with the filters below.

27 plants

Nectar
Common evening-primrose1 of 3
Common evening-primrose Oenothera biennis
Nectar
American trumpet vine1 of 2
American trumpet vine Campsis radicans
Nectar
Yellow trumpet flower
Yellow trumpet flower Tecoma stans
Nectar
Butterfly milkweed1 of 2
Butterfly milkweed Asclepias tuberosa
Nectar
Dense blazing star1 of 2
Dense blazing star Liatris spicata
Nectar
Cardinal flower1 of 2
Cardinal flower Lobelia cardinalis
Nectar
Buttonbush1 of 2
Buttonbush Cephalanthus occidentalis
Nectar
Swamp rose mallow1 of 2
Swamp rose mallow Hibiscus moscheutos
Nectar
Yellow jessamine1 of 2
Yellow jessamine Gelsemium sempervirens
Nectar
Firewheel1 of 3
Firewheel Gaillardia pulchella
Nectar
False sunflower1 of 3
False sunflower Heliopsis helianthoides
Nectar
Coral honeysuckle1 of 3
Coral honeysuckle Lonicera sempervirens
Nectar
Obedient plant1 of 2
Obedient plant Physostegia virginiana
Host + Nectar
Partridge pea1 of 2
Partridge pea Chamaecrista fasciculata
Nectar
Autumn sage1 of 2
Autumn sage Salvia greggii
Nectar
Orange coneflower1 of 2
Orange coneflower Rudbeckia fulgida
Nectar
Pickerelweed1 of 2
Pickerelweed Pontederia cordata
Nectar
Tall goldenrod1 of 2
Tall goldenrod Solidago altissima
Nectar
Lyreleaf sage1 of 3
Lyreleaf sage Salvia lyrata
Nectar
Common wrinkle-leaved goldenrod1 of 2
Common wrinkle-leaved goldenrod Solidago rugosa
Nectar
Spotted horsemint1 of 3
Spotted horsemint Monarda punctata
Nectar
Fivespot1 of 2
Fivespot Nemophila maculata
Nectar
Prairie blazing star1 of 2
Prairie blazing star Liatris pycnostachya
Host
Sensitive pea1 of 2
Sensitive pea Chamaecrista nictitans
Nectar
Pine lily1 of 2
Pine lily Lilium catesbaei
Nectar
Texas Paintbrush1 of 2
Texas Paintbrush Castilleja indivisa
Nectar
Marsh Rattlesnake Master1 of 2
Marsh Rattlesnake Master Eryngium aquaticum

Sources