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 porcheri   FAMILY Asteraceae__   Go to FSUS key


 

COMMON NAME:
Outcrop Ragweed, Flatrock Ragweed


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

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

Samantha Tessel    sam071922_9172

July    Greenville County    SC

Chandler Heritage Preserve

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

Samantha Tessel    sam071922_9172b

July    Greenville County    SC

Chandler Heritage Preserve

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

Samantha Tessel    sam071922_9172c

July    Greenville County    SC

Chandler Heritage Preserve

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

Samantha Tessel    sam071922_9173

July    Greenville County    SC

Chandler Heritage Preserve

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

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).

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

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).

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

JK Marlow    jkm070920_009

September    Pickens County    SC

Poe Creek State Forest

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

JK Marlow    jkm070920_012

September    Pickens County    SC

Poe Creek State Forest

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

JK Marlow    s070920_f

September    Pickens County    SC

Poe Creek State Forest

image of Ambrosia porcheri, Outcrop Ragweed, Flatrock Ragweed

JK Marlow    s070920_f2

September    Pickens County    SC

Poe Creek State Forest

 

Find by SCIENTIFIC NAME:

2491

Forb
Annual

Native to South Carolina

Rare, apparently endemic to the Piedmont Blue Ridge escarpment region of nw. SC

Habitat: In shallow soil mats on granitic domes, per Weakley's Flora

map
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!



 


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