Botanical name: Helianthus debilis
Common names: Beach Sunflower, Dune Sunflower
Family: Asteraceae
Origin: North America
USDA Plant Hardiness Zone Map
It is an excellent salt-tolerant groundcover with very nice flowers that provides pollinating sources for some insects. Drought-tolerant; suitable for xeriscaping.
Similar plants: Helianthus debilis (Beach Sunflower)
Link to this plant:
https://toptropicals.com/catalog/uid/helianthus_debilis.htm