Native & Naturalized Plants of the Carolinas & Georgia


526

Forb
Annual

Native to the Carolinas & Georgia
Documented growing wild in GA NC SC

Common

Look for it in old fields, disturbed areas, gardens, per Weakley's Flora

map
To see a detailed map, click here

 

full sun

LEAVES:
Simple
Alternate (basal usually withered by flowering)

FLOWER:
Summer/Fall
Rays: White/Lavender (few, 1-2mm long)
Disc: Yellow/Yellowish
Disc flowers bisexual/ Ray flowers pistillate
Inferior ovary

FRUIT:
Summer/Fall
Yellowish
Achene

 

TO LEARN MORE about this plant, look it up in a good book!



Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales

WEAKLEY'S FLORA (11/30/12):
Conyza canadensis var. canadensis   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Conyza canadensis var. canadensis   FAMILY Asteraceae

SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (1968) 179-44-008a:
Erigeron canadensis var. canadensis   FAMILY Asteraceae

SYNONYMOUS WITH Gray's Manual of Botany (Fernald, 1950)
Erigeron canadensis

SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933)
Leptilon canadense

 

COMMON NAME:
Common Horseweed


Click or hover over the thumbnails to see larger pictures.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_leca16_001_lvd

        

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_828

July    Spartanburg County    SC

Leaves alternately spiraling, numerous and crowded along stem, per Forest Plants of the Southeast and Their Wildlife Uses.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_831

July    Spartanburg County    SC

Pappus bristles white to tan, capillary, 2-2.3mm long, per Vascular Flora of the Carolinas.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_835

July    Spartanburg County    SC

Stem spreading pubescent, rarely glabrous (whereas var. pusillus is glabrous), per Vascular Flora of the Carolinas.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_837

July    Spartanburg County    SC

The inflorescence is a large open panicle bearing a great many small heads, per Wildflowers of the Southern Mountains.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_839

July    Spartanburg County    SC

Stem leaves sessile, long-ciliate particularly toward base, base attenuate, per Vascular Flora of the Carolinas.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_854

July    Spartanburg County    SC

The involucre is 1/8" high, and the whitish rays are narrow, short and erect, per Wildflowers of the Southern Mountains.

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm120727_858

July    Spartanburg County    SC

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

Gill Newberry    gn08_c_canadensis_inf

August        

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

Gill Newberry    gn08_c_canadensis_plant

August        

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

Gill Newberry    gn08_e_conyza_canadensis

August        

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

Gill Newberry    gn08_e_conyza_inf

August        

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

JK Marlow    jkm130824_548

August    Spartanburg County    SC

picture of Erigeron canadensis var. canadensis, image of Conyza canadensis var. canadensis

Gill Newberry    gn09_e_conyza_habitat

September