Answer: Lantana is a groundcover that can get almost shrub-like. You didn't mention how much space you have, or whether you mean flowers for a flower bed, or flowering plants in the landscape, so I'll just provide a few possibilities. Feel free to send another question with more specifics. There aren't that many plants that bloom non-stop. You might consider choosing several species that bloom in different seasons to maintain color. Here are a few colorful plants with extended bloom cycles that do well in desert landscapes:
Perennials: Desert marigold, angelita daisy, blackfoot daisy
Shrubs: Baja red fairy duster, Mexican honeysuckle, Tecoma Orange Bells
Vines: Bougainvillea provides continuous color during frost-free weather. However, since it has thorns, it needs to be placed where it's long branches (15-20 feet) can grow without interference, and not have the blooms cut back. White potato vine can bloom throughout the year, although it is not very showy. Yuca vine (Merremia aurea) blooms summer to fall. Pink trumpet vine blooms from late summer to fall. Lilac vine (Hardenbergia violacea) blooms winter to spring as does primrose jasmine. Cat claw vine and lady bank's rose are spring bloomers.
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