IUCN threat status:

Least Concern (LC)

Comprehensive Description

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Description

This introduced shrub is 3-10' tall and across, branching abundantly. The bark of the trunk and larger branches is gray and fairly smooth. Young branches are green, terete, and very bristly-hairy. These long bristly hairs are purple-brown and sticky from minute glands. Alternate compound leaves occur at intervals along young branches; they are ¾–1½' long and odd-pinnate with 7-15 leaflets. The green rachis (central stalk) of each odd-pinnate leaf is slightly sticky-hairy. At the base of each rachis is a pair of sharp spines. Individual leaflets are 1-2" long and one-half as much across; they are broadly oblong, smooth along their margins, and hairless (or nearly so). Their upper surfaces are medium green, while their lower surfaces are pale green. Both axillary and terminal racemes of flowers are produced. Each raceme has 5-15 rosy-pink flowers; both the central peduncle of the raceme and its pedicels are covered with purple-brown bristly hairs. Each flower is about 1" long and nearly as wide; it has a short tubular calyx and 5 petals. The calyx is covered with purple-brown bristly hairs and it has 5 teeth. The petals are arranged like a typical pea-flower

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Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© John Hilty

Source: Illinois Wildflowers

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