Dig deeper at SERNEC, a consortium of southeastern herbaria.
The exotic Hairy Fleabane (E. bonariensis) is quite similar but is copiously hairy. Read more at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (2/8/20):
Erigeron canadensis
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Conyza canadensis var. canadensis
FAMILY
Asteraceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 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.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_leca16_001_lvd
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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.
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JK Marlow jkm120727_831
July Spartanburg County SC
Pappus bristles white to tan, capillary, 2-2.3mm long, per Vascular Flora of the Carolinas.
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JK Marlow jkm120727_835
July Spartanburg County SC
Stem spreading pubescent, rarely glabrous (whereas var. pusillus is glabrous), per Vascular Flora of the Carolinas.
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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.
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JK Marlow jkm120727_839
July Spartanburg County SC
Stem leaves sessile, long-ciliate particularly toward base, base attenuate, per Vascular Flora of the Carolinas.
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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.
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JK Marlow jkm120727_858
July Spartanburg County SC
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Gill Newberry gn08_c_canadensis_inf
August
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Gill Newberry gn08_c_canadensis_plant
August
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Gill Newberry gn08_e_conyza_canadensis
August
)
Gill Newberry gn08_e_conyza_inf
August
)
JK Marlow jkm130824_548
August Spartanburg County SC
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Gill Newberry gn09_e_conyza_habitat
September