Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Campanulids: Asterales
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus verticillatus
FAMILY
Asteraceae
Go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
The species has become a bit popular (niche market) as an ornamental and may be expected to be encountered outside its (admittedly poorly understood) native range. It is a species, not a hybrid; its morphological characteristics alone (with its unique whorled leaves) make hybrid status implausible, per Weakley's Flora (2022)
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus verticillatus
FAMILY
Asteraceae
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Helianthus verticillatus
SYNONYMOUS WITH Flora of North America north of Mexico, vol. 19-20-21 (2006)
Helianthus verticillatus
SYNONYMOUS WITH Floristic Synthesis of North America (Kartesz, 1999)
Helianthus ×verticillatus
SYNONYMOUS WITH Manual of Vascular Plants of NE US & Adjacent Canada (Gleason & Cronquist,1991)
Helianthus ×verticillatus
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus verticillatus
COMMON NAME:
Whorled Sunflower
To see larger pictures, click or hover over the thumbnails.
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Richard and Teresa Ware rtw_h_verticillat_1
September
Rays 10-19. Disc florets with yellow lobes, dark anthers & yellow appendages, per Flora of North America.
WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Helianthus verticillatus
FAMILY
Asteraceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Helianthus verticillatus
FAMILY
Asteraceae
SYNONYMOUS WITH
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Helianthus verticillatus
SYNONYMOUS WITH
Flora of North America north of Mexico, vol. 19-20-21
Helianthus verticillatus
SYNONYMOUS WITH
Floristic Synthesis of North America (Kartesz, 1999)
Helianthus ×verticillatus
SYNONYMOUS WITH
Manual of Vascular Plants of NE US & Adjacent Canada (Gleason & Cronquist,1991)
Helianthus ×verticillatus
SYNONYMOUS WITH
Manual of the Southeastern Flora (Small, 1933, 1938)
Helianthus verticillatus
3728
Forb
Perennial
Habitat: Seasonally wet to moist calcareous prairies, per Weakley's Flora
Native to Georgia
Rare
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
LEAVES:
Simple
Usually whorled, sometimes opposite
FLOWER:
Summer/Fall
Rays: Yellow
Disc: Yellow
Inferior ovary
Disc flowers bisexual & fertile/ Ray flowers pistillate but sterile
FRUIT:
Summer/Fall
Achene
TO LEARN MORE about this plant, look it up in a good book!
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".