NameThatPlant.net: Iva annua

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Iva annua FAMILY Asteraceae__ Go to FSUS key

Dig deeper at SERNEC, a consortium of southeastern herbaria.

Read more about Sumpweed at Vascular Plants of North Carolina.

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Iva annua FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-01-003:

Iva annua FAMILY Asteraceae__

COMMON NAME:
Sumpweed, Rough Marsh-elder, Annual Marsh-elder

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Iva annua FAMILY Asteraceae__

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Iva annua FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-01-003:
Iva annua FAMILY Asteraceae__

3525

Forb
Annual

Habitat: Fields, especially bottomlands, disturbed places; in the eastern and inland part of area probably introduced (by native Americans) from farther west, per Weakley's Flora

Native to Georgia

Rare

CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

LEAVES:
Simple
Opposite

FLOWER:
Summer/Fall
Disc: Cream, greenish-white
Rays: Absent or less than 3mm
Staminate corollas distinctly 5-lobed
5 stamens in staminate flowers
Inferior ovary
Unisexual, in mixed heads

FRUIT:
Summer/Fall
Blackish-brown
Achene

TO LEARN MORE about this plant, look it up in a good book!

If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".

Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".