Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA (11/30/12):
Helianthus decapetalus
FAMILY
Asteraceae
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Thinleaf Sunflower at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus decapetalus
FAMILY
Asteraceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-013:
Helianthus decapetalus
FAMILY
Asteraceae
COMMON NAME:
Thinleaf Sunflower, Forest Sunflower
To see larger pictures, click or hover over the thumbnails.
JK Marlow jkm140809_372
August Greenville County SC
Swamp Rabbit Trail
The tips of its leaf blades are unusually long and slender, per www.illinoiswildflowers.info.
JK Marlow jkm140809_373
August Greenville County SC
Swamp Rabbit Trail
Leaf base widely cuneate or truncate, petioles oft obscured by decurrent blade, per Vascular Flora of the Carolinas.
JK Marlow jkm140809_374b
August Greenville County SC
Swamp Rabbit Trail
Longer phyllaries usually exceeding disk by half their length+, apex acuminate, per Weakley's Flora.
COMPARE
involucral bracts of Sunflowers
JK Marlow jkm140809_379
August Greenville County SC
Swamp Rabbit Trail
The disk is small compared to the rays, which may be 1.5" long, per Wildflowers of the Southern Mountains.
JK Marlow jkm140823_022
August Greenville County SC
Swamp Rabbit Trail
Ray florets 8-12; disc florets lobes yellow; anthers ~ dark brown to black, per Flora of North America.
JK Marlow jkm140823_025
August Greenville County SC
Swamp Rabbit Trail
The floral bracts are unusually long and slender, per www.illinoiswildflowers.info.
JK Marlow jkm140823_027
August Greenville County SC
Swamp Rabbit Trail
Leaf abaxial faces ± scabro-hispidulous, relatively sparsely gland-dotted, per Flora of North America.
JK Marlow jkm140823_029
August Greenville County SC
Swamp Rabbit Trail
Upper stems have short bristly hairs; lower glabrous, sometimes glaucous, per www.illinoiswildflowers.info.
JK Marlow jkm121024_667
October Cherokee County NC
Murphy River Walk
Intergrades with H. strumosus, particularly in the southern Appalachians, per Flora of North America.
WEAKLEY'S FLORA (11/30/12):
Helianthus decapetalus
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus decapetalus
FAMILY
Asteraceae
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-013:
Helianthus decapetalus
FAMILY
Asteraceae