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Blue Giant Hyssop (Agastache foeniculum) |
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Agastache scrophulariifolia The flowers of Purple Giant Hyssop are purple, not blue-violet.
Agastache nepetoides The flowers of Yellow Giant Hyssop (as the name implies) are yellow. Blue Giant Hyssop (Agastache foeniculum) Identification: Flowers blue-violet, 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. Stem square and leaves in opposite pairs. Leaves heart-shaped, coarsely dentate on the outer margin, and with an anise smell. Plant 2 to 4 feet in height. Distribution: Across southern Canada and southward into the northern United States to Washington in the west and Pennsylvania, Illinois, and Kentucky in the east. Habitat: Blue Giant Hyssop is a species of prairies and thickets. Flowering period: June to September. |
Blue Giant Hyssop (Agastache foeniculum)
Similar Species: Purple Giant Hyssop (Agastache scrophulariifolia) Yellow Giant Hyssop (Agastache nepetoides)
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Similar Species |
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