Phlox divaricata L. - Sweet William, Blue Phlox
Family - Polemoniaceae
Stems - Vegetative stems decumbent. Flowering stems erect to ascending, to 40cm tall. Both types typically densely pubescent to glabrous. Plants rhizomatous.
Leaves - Of fertile shoots - opposite, sessile, lanceolate, decussate, spaced +/-5cm apart, to 5cm long, 2cm wide, variously pubescent, entire. Of sterile shoots - elliptic to narrowly oblong.
Leaves of fertile shoots.
Leaves of sterile shoots.
Inflorescence - A fairly compact cyme, sometimes paniculate.
Flowers - Corolla lavender to purple, with tube to 2cm long, glabrous. Corolla lobes 5, spreading, spatulate to obovate, to 2cm long, 1cm wide. Stamens 5, unequal in corolla tube. Calyx tube to 3mm long, densely pubescent to glabrous. Calyx lobes 5, to +3mm long.
Flowering - April - June.
Habitat - Open woods, slopes, moist ground.
Origin - Native to U.S.
Other info. - This is the
most common species of Phlox found in the state. It
is one of the earliest blooming plants in spring also. The corolla is typically
light blue-purple but can vary in color from rose to white. A white flowered
form can be seen in the "White Flowers Opposite Page" of this website.
Photographs taken off Northwood Rd., Platte County, MO., 4-7-00, and near Van Buren, MO., 4-15-01.