Seed collected from MPF’s Stilwell Prairie. Photo: Scott Lenharth

Slender Mountain Mint (Pycnanthemum tenuifolium)

Distinguishing Characteristics

Smooth, square stem. Numerous pairs of slender leaflets. Branching occurs at the leaf axils. Leaves have mint aroma when crushed.

Height

Up to 2 1/2 feet

Blooms

June to September

Description

Flower, in dense, half-round heads, are usually white and, but are occasionally a light lavender. The upper lip is not lobed, while the lower lip has three distinct lobes.

Comments

Found in tallgrass prairie region in glades, savannas, and open woodlands. Commonly used in seeding mixes and is easy to establish from seed. Good nectar source for insects.

small tan seeds next to ruler showing size.

Seeds (scale is in 1/16 inch increments)

small green seedling

Seedling

Sall green plant with opp leaves

Juvenile

Sall green plant with opp leaves

Distinguishing Characteristics

Sall green plant with opp leaves

Mature

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