Thyme-leaved Speedwell
Veronica serpyllifolia
From Missouri Plants
Stems - Multiple from the base, prostrate to ascending, rooting at the nodes, branching, from fibrous roots, to +30cm long (10-15cm tall).
Leaves - Opposite, very short-petiolate. Petioles to 1mm long, glabrous. Blades orbicular, entire to slightly crenate, green, Leaves reduced to bracts in inflorescence.
Inflorescence - Terminal bracteate racemes. Pedicels to 2mm long,.
Flowers - Corolla zygomorphic, whitish-blue with purple stripes internally, glabrous externally, pubescent internally near the apex of the corolla tube, 4-lobed. Corolla tube to .8mm long. Lobes rounded, to 3mm long and broad, entire. Lower lobe reduced. Stamens 2 between lateral and central lobes. Anthers purple, .3mm long.
Flowering - April - July, sometimes again in the fall.
Habitat - Low wet woods, spring branches, wet slopes, grassy places, waste ground.
Origin - Native to Europe.