| Noun | 1. | phlox - any polemoniaceous plant of the genus Phlox; chiefly North American; cultivated for their clusters of flowersherb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests genus Phlox - herbaceous to shrubby evergreen or deciduous annuals or perennials, diffuse (spreading) or caespitose (tufted or matted); from Alaska and western Canada to Mexico | |