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):
Ambrosia artemisiifolia   FAMILY Asteraceae__   Go to FSUS key



INCLUDING PLANTS NATIONAL DATABASE:
Ambrosia artemisiifolia +   FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-02-003:

Ambrosia artemisiifolia   FAMILY Asteraceae__

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

Ambrosia elatior

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

Ambrosia glandulosa

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

Ambrosia monophylla

 

COMMON NAME:
Annual Ragweed, Common Ragweed, Hogweed


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

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

USDA / Selected Weeds of the US. 1970    swus_page_365

        

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm0405zb_25

May    Greenville County    SC

Chandler Heritage Preserve

Leaves deeply bipinnately dissected, per Guide to the Wildflowers of SC, 1st ed. (Porcher & Rayner, 2001).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm140623_225

June    Greenville County    SC

Swamp Rabbit Trail

A. artemisiifolia's height:width ratio > 0.8 (vs. that of A. porcheri < 0.8), per Weakley's Flora (2022).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm210624_1516

June    SpartanburgCounty    SC

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm210624_1517

June    SpartanburgCounty    SC

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm150724_514

July    Pickens County    SC

Annual with taproot and freely branched stems, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm220722_9192

July    Greenville County    SC

Bald Rock Heritage Preserve

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm0308i_08

August    Alamance County    NC

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm190831_1080

August    Greenville County    SC

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

Roxanna Martin    rlm82810_82

August    Spartanburg County    SC

Female flowers borne in clusters from the upper leaf axils, per Wildflowers of Tennessee (Carman, 2005).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

Gill Newberry    gn09_a_artemes_leaf

September        

The specific epithet "artemisiifolia" means leaves resembling Artemisia.


click here to see other plants that look similar to this COMPARE leaves of Mugwort, Ragweed and Spanish Needles

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

Roxanna Martin    rlm9110_57

September    Spartanburg County    SC

Male flowers in spikelike clusters that terminate stem and upper branches, per Wildflowers of Tennessee (Carman, 2005).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

Roxanna Martin    rlm91811_54

September    Spartanburg County    SC

Female heads roundish, clustered in upper leaf axils below male spike, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

Roxanna Martin    rlm91811_56

September    Spartanburg County    SC

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

Roxanna Martin    rlm9310_80

September    Spartanburg County    SC

Male heads saucer-shaped, about 0.1" wide, disk flowers 5-lobed, per Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005).

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm151006_329

October    Greenville County    SC

Swamp Rabbit Trail

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm151006_329b

October    Greenville County    SC

Swamp Rabbit Trail

image of Ambrosia artemisiifolia, Annual Ragweed, Common Ragweed, Hogweed

JK Marlow    jkm151006_331

October    Greenville County    SC

Swamp Rabbit Trail

 

 

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

INCLUDING PLANTS NATIONAL DATABASE:
Ambrosia artemisiifolia +   FAMILY Asteraceae__

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-02-003:
Ambrosia artemisiifolia   FAMILY Asteraceae__

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

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

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

 

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