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 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.
)
USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide pnd_ivan2_006_lvd
)
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_ivci2_001_lvd
)
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).
)
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
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.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
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".