Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Thinleaf Sunflower at Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
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
COMMON NAME:
Thinleaf Sunflower, Forest Sunflower
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_hede_001_lvd
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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.
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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.
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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
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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.
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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.
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JK Marlow jkm140823_025
August Greenville County SC
Swamp Rabbit Trail
The floral bracts are unusually long and slender, per www.illinoiswildflowers.info.
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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.
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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.
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Keith Bradley kab_h_decapetalus_2895
August Macon County NC
Nantahala National Forest
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JK Marlow jkm170914_0447
September Haywood County NC
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JK Marlow jkm170914_0450
September Haywood County NC
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JK Marlow jkm170914_0452
September Haywood County NC
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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.