Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Ambrosia at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
Giant Ragweed, Great Ragweed
Click or hover over the thumbnails to see larger pictures.
JK Marlow s060617_b
June Greenville County SC
Leaves 3(5)-lobed or unlobed, tips acuminate, margins evenly serrate, per Vascular Flora of the Carolinas.
COMPARE leaves of Giant Ragweed and Sassafras
JK Marlow jkm130823_485
August Greenville County SC
Swamp Rabbit Trail
Leaves usually with 3-5 deep lobes, per Newcomb's Wildflower Guide.
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
Just looking at the picture makes you want to sneeze...