Dig deeper at SERNEC, a consortium of southeastern herbaria.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (11/30/12):
Ambrosia trifida var. trifida
FAMILY
Asteraceae__
LESS THAN
PLANTS NATIONAL DATABASE:
Ambrosia trifida var. trifida
FAMILY
Asteraceae__
LESS THAN
VASCULAR FLORA OF THE CAROLINAS (1968) 179-02-002:
Ambrosia trifida
FAMILY
Asteraceae__
COMMON NAME:
Giant Ragweed, Great Ragweed
Click or hover over the thumbnails to see larger pictures.
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JK Marlow jkm140623_235
June Greenville County SC
Swamp Rabbit Trail
)
JK Marlow s060617_b
June Greenville County SC
Roadside/creekside
Leaves 3(5)-lobed or unlobed, tips acuminate, margins evenly serrate, per Vascular Flora of the Carolinas.
COMPARE
leaves of Giant Ragweed and Sassafras
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Gill Newberry gn08_a_trifida_plant
August
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JK Marlow jkm130823_485
August Greenville County SC
Swamp Rabbit Trail
Leaves usually with 3-5 deep lobes, per Newcomb's Wildflower Guide.
)
Keith Bradley kab_ambrosia_trifida_2776
August Swain County NC
Great Smoky Mountains National Park
)
Roxanna Martin rlm83010_171
August Spartanburg County SC
Staminate heads 3-5mm broad, peduncles 2-7mm long, per Vascular Flora of the Carolinas.
)
JK Marlow jkm0309e_13a
September Greenville County SC
Roadside
Just looking at the picture makes you want to sneeze...
)
JK Marlow jkm0309f_23
September Greenville County SC
Roadside
)
JK Marlow jkm110925_622
September Greenville County SC
)
JK Marlow jkm190903_1208
September Greenville County SC
)
Richard and Teresa Ware rtw_ambrosia_trifida_2
September
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JK Marlow jkm0310e_06
October Jackson County NC
Roadside
)
JK Marlow jkm0310e_09
October Jackson County NC
Roadside
)
JK Marlow jkm121024_677
October Cherokee County NC
Murphy River Walk
)
JK Marlow jkm121024_684
October Cherokee County NC
Murphy River Walk