IUCN threat status:

Not evaluated

Comprehensive Description

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This native perennial plant is 2-4' tall. It has green or brown stems that are four-angled and covered with white hairs. These stems frequently branch and achieve a slender bushy effect. The opposite leaves are up to 3" long and ¾" long. They are light or whitish green, pubescent on both sides, lanceolate in shape, and have smooth edges. The foliage has a mint fragrance. The small white flowers are in dense clusters toward the apex of the plant. Each flower is about ¼" long, 2-lipped, and usually has small purple dots near the throat. The blooming period occurs during mid- or late summer and lasts about a month. Each flower produces 4 tiny seeds, which are distributed to some extent by the wind. The root system consists of a branching taproot, as well as short rhizomes that cause the plant to form small colonies.


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

© John Hilty

Source: Illinois Wildflowers

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