Spreading Jacob’s ladder is a North American native. It prefers partial shade and
rich, moist woods, and is often found along streambanks. The common name “Jacob’s ladder”
refers to the neat pairs of opposite leaflets in the compound leaves, resembling a series
of steps on a ladder, from a dream by the biblical Jacob.
Plants: These perennials are 6-18″ (15-45 cm) tall, and somewhat
branched. The rather weak stems sag under the weight of the leaves, sprawling across the ground. They are light or
reddish green, somewhat angular, and hollow.
Leaves: Leaves are odd-pinnate and alternate,
with 7-17 leaflets.
Leaflets are ¾-1¼″ (1.9-3.2 cm) × ¼-⅜″ (6.3-10 mm), and oval-shaped (elliptic) to
lance-shaped (lanceolate). Lower leaflets are attached by stems (petioles), but the stems
shorten and disappear in the upper leaflets.
Flowers: Loose “blobs” or panicles of flowers are 1½-3″ (3.8-7.6 cm)
across. Additional groups of flowers are sometimes produced from leaf axils, and may be up to 6″ (15 cm)
long. Each flower is light blue, bell-shaped, with five petals fused at the base,
and up to ⅝″ (1.6 cm) across. (Rarely, flowers are lavendar, pink, purple, or white.)
Flowers appear April-June.