Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Ambrosia porcheri
FAMILY
Asteraceae__
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
SYNONYMOUS WITH Ambrosia porcheri (Asteraceae): a new species from the Blue Ridge Escarpment of South Carolina (McMillan & Prevost, 2022)
Ambrosia porcheri
COMMON NAME:
Outcrop Ragweed, Flatrock Ragweed
To see larger pictures, click or hover over the thumbnails.
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Samantha Tessel sam071922_9172
July Greenville County SC
Chandler Heritage Preserve
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Samantha Tessel sam071922_9172b
July Greenville County SC
Chandler Heritage Preserve
)
Samantha Tessel sam071922_9172c
July Greenville County SC
Chandler Heritage Preserve
)
Samantha Tessel sam071922_9173
July Greenville County SC
Chandler Heritage Preserve
)
Samantha Tessel sam071922_9173b
July Greenville County SC
Chandler Heritage Preserve
Terminal leaf lobe 1.0-2.0mm wide; fresh foliage abundantly viscid, w a floral jasmine-like odor, per Weakley's Flora (2022).
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Samantha Tessel sam071922_9173c
July Greenville County SC
Chandler Heritage Preserve
Foliage with hairs to 0.3mm long (vs. A. artemisiifolia hairs to 1.8mm long), per Weakley's Flora (2022).
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JK Marlow jkm070920_009
September Pickens County SC
Poe Creek State Forest
)
JK Marlow jkm070920_012
September Pickens County SC
Poe Creek State Forest
)
JK Marlow s070920_f
September Pickens County SC
Poe Creek State Forest
)
JK Marlow s070920_f2
September Pickens County SC
Poe Creek State Forest
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Ambrosia porcheri
FAMILY
Asteraceae__
SYNONYMOUS WITH
Ambrosia porcheri (Asteraceae): a new species from the Blue Ridge Escarpment of South Carolina (McMillan & Prevost, 2022)
Ambrosia porcheri
2491
Forb
Annual
Habitat: In shallow soil mats on granitic domes, per Weakley's Flora
Native to South Carolina
Rare (apparently endemic to the Piedmont Blue Ridge escarpment region of northwest SC)
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: Dissected
Lower opposite, upper alternate ?
FLOWER:
Summer/Fall
Disc: Greenish
Rays: Absent
Inferior ovary
FRUIT:
Summer/Fall?
Achene
TO LEARN MORE about this plant, look it up in a good book!