OF THE CAROLINAS & GEORGIA

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



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Iva annua   FAMILY Asteraceae__

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Iva annua

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)

Iva annua

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)

Iva annua var. annua

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)

Iva annua var. caudata

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)

Iva annua var. macrocarpa

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

Iva annua   FAMILY Asteraceae__

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Iva caudata

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)

Iva ciliata

 

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


         To see larger pictures, click or hover over the thumbnails.

image of Iva annua, Sumpweed, Rough Marsh-elder, Annual Marsh-elder

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_ivan2_006_lvd

        

image of Iva annua, Sumpweed, Rough Marsh-elder, Annual Marsh-elder

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_ivci2_001_lvd

        

image of Iva annua, Sumpweed, Rough Marsh-elder, Annual Marsh-elder

Eva Pratt    esp092212_photo_22

September        

Leaves opposite, ovate, coarsely serrate, pubescent on both surfaces, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Iva annua, Sumpweed, Rough Marsh-elder, Annual Marsh-elder

Richard and Teresa Ware    rtw_iva_annua_4

September        

Racemes 3-16cm long. Heads pendant, each head subtended by a foliaceous bract, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

 

 

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 Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Iva annua

SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21
Iva annua

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)
Iva annua var. annua

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)
Iva annua var. caudata

INCLUDING Floristic Synthesis of North America (Kartesz, 1999)
Iva annua var. macrocarpa

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

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Iva caudata

INCLUDING Manual of the Southeastern Flora (Small, 1933, 1938)
Iva ciliata

 

Find by SCIENTIFIC NAME:

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

map
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!



 


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