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Helianthus pauciflorus ssp. subrhomboideus
Helianthus pauciflorus Nutt. ssp. subrhomboideus (Rydb.) O. Spring & E. Schilling
Stiff Sunflower
Asteraceae (Aster Family)
Synonym(s): Helianthus laetiflorus var. subrhomboideus, Helianthus pauciflorus var. subrhomboideus, Helianthus rigidus ssp. laetiflorus, Helianthus rigidus ssp. subrhomboideus, Helianthus rigidus var. subrhomboideus, Helianthus subrhomboideus
USDA Symbol: HEPAS
USDA Native Status: L48 (N), CAN (N)
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Plant Characteristics
Duration: PerennialHabit: Herb
Size Notes: Up to about 4 feet tall.
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.
Bloom Information
Bloom Color: Red , YellowBloom Time: Jun , Jul , Aug , Sep
Distribution
USA: CO , CT , IA , IL , IN , KS , MA , ME , MN , MO , MT , ND , NE , NH , NM , NY , PA , SD , TX , WI , WYCanada: AB , MB , ON , SK
Growing Conditions
Light Requirement: SunBenefit
Conspicuous Flowers: yesValue to Beneficial Insects
Special Value to Native BeesThis information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
Web Reference
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.Additional resources
USDA: Find Helianthus pauciflorus ssp. subrhomboideus in USDA PlantsFNA: Find Helianthus pauciflorus ssp. subrhomboideus in the Flora of North America (if available)
Google: Search Google for Helianthus pauciflorus ssp. subrhomboideus
Metadata
Record Modified: 2022-12-28Research By: TWC Staff