Any of about 65 species of plants (genus Phlox), belonging to the family Polemoniaceae, admired both in gardens and in the wilds for their clustered heads of flowers. All species but one are native to North America. Phlox is herbaceous, usually with oval or linear leaves; it has heads of massed tubular flowers with five flaring lobes. A few species are woody, but most are herbaceous annuals or perennials. Sizes range from the 5-ft-high (1.5-m) summer phlox (P. paniculata) to the 18-in.-high (45-cm) woodland perennial blue phlox (P. divaricata) to the low-creeping, freely branching, evergreen moss pink, or creeping phlox (P. subulata).
This entry comes from Encyclopædia Britannica Concise. For the full entry on phlox, visit Britannica.com.