Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Eupatorium semiserratum
FAMILY
Asteraceae__
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Olive Eupatorium at Vascular Plants of North Carolina.
Eupatorium semiserratum often has 3 leaves per node; most similar species rarely or never have whorled leaves, per Weakley's Flora (2023).
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Eupatorium semiserratum
FAMILY
Asteraceae__
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Eupatorium semiserratum
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)
Eupatorium semiserratum
SYNONYMOUS WITH Floristic Synthesis of North America (Kartesz, 1999)
Eupatorium semiserratum
SYNONYMOUS WITH Aquatic & Wetland Plants of Southeastern US (Godfrey & Wooten, 1979 & 1981)
Eupatorium semiserratum
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-34-011:
Eupatorium semiserratum FAMILY Asteraceae__
SYNONYMOUS WITH Gray's Manual of Botany (Fernald, 1950)
Eupatorium cuneifolium var. semiserratum
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Eupatorium semiserratum
COMMON NAME:
Threeleaf Eupatorium, Smallflower Thoroughwort, Olive Eupatorium
To see larger pictures, click or hover over the thumbnails.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_euse_001_lvd
)
Bruce A. Sorrie bas_e_semiserratum2
August Hoke County NC
Its olive-green color, coupled with its whorls of 3 leaves, set this apart, per Wildflowers of the Sandhills Region (Sorrie, 2011).
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Eupatorium semiserratum
FAMILY
Asteraceae__
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Eupatorium semiserratum
FAMILY
Asteraceae__
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Eupatorium semiserratum
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 19-20-21
Eupatorium semiserratum
SYNONYMOUS WITH
Floristic Synthesis of North America (Kartesz, 1999)
Eupatorium semiserratum
SYNONYMOUS WITH
Aquatic & Wetland Plants of Southeastern US (Godfrey & Wooten, 1979 & 1981)
Eupatorium semiserratum
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-34-011:
Eupatorium semiserratum
FAMILY
Asteraceae__
SYNONYMOUS WITH
Gray's Manual of Botany (Fernald, 1950)
Eupatorium cuneifolium var. semiserratum
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Eupatorium semiserratum
3473
Forb
Perennial
Habitat: swamp forests, seepage bogs, savannas, clay-based Carolina bays, other wetlands, per Weakley's Flora
Native to the Carolinas & Georgia
Common in Coastal Plain (rare in Piedmont)
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Whorls of 3
Petioles 1-10mm long
FLOWER:
Summer/Fall
Disc: White
Rays: Absent
Inferior ovary
Bisexual
FRUIT:
Summer/Fall
Lustrous black
Achene
TO LEARN MORE about this plant, look it up in a good book!
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p193
- Wildflowers of Tennessee (Carman, 2005) p294
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p342
- Wildflowers of the Sandhills Region (Sorrie, 2011) p235
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