Vernonia altissima Nutt. - Tall Ironweed

Vernonia altissima plant

Family - Asteraceae

Stems - No info yet.

Vernonia altissima stem

Leaves - No info yet.

Vernonia altissima leavesLower leaves.

Vernonia altissima leavesUpper leaves.

Inflorescence - No info yet.

Involucre - No info yet.

Vernonia altissima involucre

Ray flowers - Absent.

Disk flowers - No info yet.

Vernonia altissima flowers

Flowering - August - October.

Habitat - Low woods, alluvial ground, low thickets, swamp margins, spring branches, meadows, prairies.

Origin - Native to U.S.

Other info. - This species can be found scattered throughout much of Missouri but is mostly absent in the northeast and southwest corners of the state. It is most common in the southeast corner of Missouri. The plant has flowerheads with up to 30 florets but the usual number is about 15. The involucre of this species has appressed phyllaries which have ciliate margins.
A more current synonym for this species is Vernonia gigantea (Walt.) Trel. ssp. gigantea

Photographs taken off Lee Rd 54, Auburn, AL., 10-7-04.