Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus atrorubens
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Read more about Purpledisc Sunflower at Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus atrorubens
FAMILY
Asteraceae
SYNONYMOUS WITH Flora of North America
Helianthus atrorubens
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-005:
Helianthus atrorubens FAMILY Asteraceae
INCLUDED WITHIN Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus atrorubens
COMMON NAME:
Purple-disk Sunflower, Hairy Wood Sunflower, Appalachian Sunflower
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_heat_001_lvd
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JK Marlow jkm060528_002
May Greenville County SC
Tall Pines Wildlife Management Area
)
JK Marlow jkm120728_984
July Abbeville County SC
Parson's Mountain Recreation Area
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JK Marlow jkm190726_0167
July Transylvania County NC
DuPont State Forest
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JK Marlow jkm190726_0169
July Transylvania County NC
DuPont State Forest
Related to the Ozarkian H. silphioides [Rosinweed Sunflower], per Weakley's Flora (2022).
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JK Marlow jkm0408j_31
August Oconee County SC
Flowers have reddish disk and are at the end of long naked branches, per Wildflowers of the Southern Mountains (Smith, 1998).
)
JK Marlow jkm0508g_26
August Greenville County SC
Tall Pines Wildlife Management Area
)
JK Marlow jkm120812_360
August Greenville County SC
Ashmore Heritage Preserve
)
JK Marlow jkm200808_6913
August Transylvania County NC
DuPont State Forest
)
JK Marlow jkm210807_2537
August Transylvania County NC
DuPont State Forest
)
JK Marlow jkm210812_2636
August Transylvania County NC
DuPont State Forest
Noticeably stiff hairs & stiff hairy leaves.
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JK Marlow jkm080914_014
September Greenville County SC
Ashmore Heritage Preserve
Phyllaries broadly ovate to oblong, apices obtuse to acute, occ. mucronate, per Flora of North America.
COMPARE
involucral bracts of Sunflowers
)
JK Marlow jkm120908_369b
September Greenville County SC
Helianthus disc flowers have styles that are bifurcate [two-forked], per www.missouriplants.com
)
JK Marlow jkm180905_4570
September Greenville County SC
The disc florets mature from the outside in [centripetally].
)
JK Marlow jkm180906_4605
September Greenville County SC
This is the same flower head, one day later.
)
JK Marlow jkm210903_3321
September Greenville County SC
Tall Pines Wildlife Management Area
Leaves basally disposed, the few leaves of the lower stem reduced upward, per Weakley's Flora (2012).
)
JK Marlow jkm220909_9832
September Transylvania County NC
DuPont State Forest
)
Richard and Teresa Ware rtw_h_atrorubens_2b
September
Disk flowers red or purple (at least in part), per Weakley's Flora.
)
JK Marlow s040901_b
September Greenville County SC
Roadside
Leaves rhombic to triangular-ovate, pubescent and scabrous on both sides, per Vascular Flora of the Carolinas (Radford, Ahles, & Bell, 1968).
)
JK Marlow s040901_c
September Greenville County SC
Roadside
Petiole often > 1/3 as long as the blade, broadly winged toward the blade, per Weakley's Flora.
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus atrorubens
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus atrorubens
FAMILY
Asteraceae
SYNONYMOUS WITH
Flora of North America
Helianthus atrorubens
SYNONYMOUS WITH
VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 179-65-005:
Helianthus atrorubens
FAMILY
Asteraceae
INCLUDED WITHIN
Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus atrorubens
645
Forb
Perennial
Habitat: Dry soils of rocky, sandy, or clayey woodlands and roadbanks, per Weakley's Flora
Native to the Carolinas & Georgia
Common (rare in GA Coastal Plain)
Click here to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
LEAVES:
Simple
Basal & opposite (reduced upward)
FLOWER:
Summer/Fall
Rays: Yellow
Disc: Purplish-red
Disc flowers bisexual & fertile/ Ray flowers pistillate but sterile
Inferior ovary
FRUIT:
Summer/Fall
Brown
Achene
TO LEARN MORE about this plant, look it up in a good book!
- All About South Carolina Wildflowers (Midgley, 1999) p170
- Gardening with the Native Plants of Tennessee (Hunter, 2002) p135
- Wildflowers of the Atlantic Southeast (Cotterman, Waitt, & Weakley, 2019) p298
- Wildflowers of the Eastern United States (Duncan & Duncan, 1999) p122
- Field Guide to the Wildflowers of Georgia (Chafin, 2016) p086
- Wildflowers of Tennessee (Carman, 2005) p305
- Wildflowers of Tennessee, the Ohio Valley, and the Southern Appalachians (Horn, Cathcart, Hemmerly, & Duhl, 2005) p354
- Wildflowers of the Southern Mountains (Smith, 1998) p191
- Wildflowers of the Sandhills Region (Sorrie, 2011) p058