Yellow Giant Hyssop

(Agastache nepetoides)

 

Color Photograph: U.S. Environmental Protection Agency

Line Drawing: Britton, N.L., and A. Brown. 1913. An Illustrated Flora of the Northern United States and Canada, Second Edition.

 

Yellow Giant Hyssop (Agastache nepetoides)

Identification: Flowers yellow, tubular, with a hanging, biblike lower petal lobe. Two pairs of protruding stamens, one pair curving upward, the other pair downward. Style thin, long, protruding, bifid at the tip. Flowers arranged in dense clusters in the upper leaf axils, the upper clusters fusing to give the appearance of a terminal spike. Entire plant hairy. Stem square, smooth, and leaves in opposite pairs. Leaves heart-shaped, coarsely dentate on the outer margin. Plant 2 to 4 feet in height.

Distribution: South Dakota in the west to Quebec in the east, southward to Georgia and Arkansas.

Habitat: Yellow Giant Hyssop is found along the edges of woods and in thickets.

Flowering Period: July to September.

Yellow Giant Hyssop (Agastache nepetoides)

Similar Species: The dense, terminal spikes and the yellow flowers are distinctive.

Similar Species

No Similar Species