Dig deeper at SERNEC, a consortium of southeastern herbaria.

Swamp Tickseed lacks lower and basal leaves at flowering time; they drop off from the 4 lowest nodes, sometimes more. Read more at Vascular Plants of North Carolina.

Similar to Coreopsis gladiata but stems ascending or nearly prostrate, basal and lower cauline leaves absent during anthesis, and mid-cauline leaves elliptical. Also, achene wings very broad relative to body width and achene awns short, per Weakley et al. (2011).

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Coreopsis palustris   FAMILY Asteraceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Coreopsis palustris

INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21 (2006)

Coreopsis gladiata

INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)

Coreopsis gladiata

SYNONYMOUS WITH (MISAPPLIED) VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-69-002:

Coreopsis helianthoides   FAMILY Asteraceae

SYNONYMOUS WITH (MISAPPLIED) Manual of the Southeastern Flora (Small, 1933, 1938)

Coreopsis helianthoides

COMMON NAME:
Beadle's Coreopsis, Swamp Tickseed

NameThatPlant has no pictures at this time. You might try this link: Flora of the Southeastern United States

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/14/23):
Coreopsis palustris   FAMILY Asteraceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Coreopsis palustris   FAMILY Asteraceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Coreopsis palustris

INCLUDED WITHIN Flora of North America north of Mexico, vol. 19-20-21
Coreopsis gladiata

INCLUDED WITHIN Floristic Synthesis of North America (Kartesz, 1999)
Coreopsis gladiata

SYNONYMOUS WITH (MISAPPLIED) VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-69-002:
Coreopsis helianthoides   FAMILY Asteraceae

SYNONYMOUS WITH (MISAPPLIED) Manual of the Southeastern Flora (Small, 1933, 1938)
Coreopsis helianthoides