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The stems and flower stalks of Jacob's ladder are green to reddish-green and hairy; the flowers occur in panicles of floppy flowers on 1" long pedicels. The flowers are bell-shaped and baby-blue in color, 3/8" across with fine longitudinal veins. There are five stamens with white anthers and a long style tipped with a Y-shaped stigma. The stamens do not project beyond the flower margins, but the style does. The fruit is an ovoid, three-celled, seed capsule about 1/4" long held in the remnants of the calyx. Jacob's ladder prefers shady woodlands. This species is similar to Greek valerian (Polemonium vanbruntiae) but the latter species has stamens that extend beyond the flower margins (and does not occur in Illinois).

Polemonium

Polemonium reptans

Jacob's ladder [Blooms: Apr-May]