IUCN threat status:

Not evaluated

Comprehensive Description

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Description

This native perennial wildflower is about 1½' tall and 2' across. A single compound leaf and the inflorescence develop from a short stalk that is less than 1" long. The slender petiole of this leaf is about 1–1¼' long and erect; it is light green to dark red and glabrous. The blade of the compound leaf is divided into 3 segments; each of these segments is pinnately compound, consisting of 3-7 leaflets. The leaflets are up to 5" long and 2" across; they are ovate to obovate, medium green, hairless, and finely serrated along their margins. The inflorescence consists of a branching stalk of several umbels (usually 3); this inflorescence is about ¾' tall and hidden from above by the leaflets. Each globoid umbel spans about 1½–2" across, consisting of about 40 small flowers and their pedicels. The pedicels are pale green and glabrous or pubescent. Each greenish white flower is about 1/8" across (or a little more), consisting of 5 petals, 5 stamens, a pistil with 5 styles, and insignificant sepals. When the flower opens, the petals become strongly recurved. The strongly exerted stamens have white filaments and white anthers. The styles are very short and appressed together in the center of the flower. The ovoid-oblongoid ovary is shiny green.

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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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