Narrowleaf sunflower

Quick look

Helianthus angustifolius is a species of sunflower known by the common name narrowleaf sunflower or swamp sunflower. It is native to the south-central and eastern United States, found in all the coastal states from Texas to Long Island, and inland as far as Missouri. It is typically found in the coastal plain habitat, particularly in wet areas.

• It belongs to the Asteraceae family. ^iNaturalist
• USDA PLANTS describes it as an herb (forb) with a perennial life cycle. ^{USDA PLANTS}
• USDA PLANTS lists it as native in the lower 48 states and records it in 23 states. ^{USDA PLANTS}
• NatureServe lists it as native to Mississippi and Louisiana. ^NatureServe
• In Mississippi, most iNaturalist sightings of it in flower come in September–November. ^iNaturalist
• In Louisiana, most iNaturalist sightings of it in flower come in June–November. ^iNaturalist
• USDA PLANTS lists its flower color as yellow. ^{USDA PLANTS}
• USDA PLANTS gives its bloom period as late summer. ^{USDA PLANTS}
• USDA PLANTS lists a mature height of about 5.6 ft. ^{USDA PLANTS}
• iNaturalist has 413 research-grade sightings of it in Mississippi, ranking #56 among the 110 flowers on our Mississippi list. ^iNaturalist
• iNaturalist has 404 research-grade sightings of it in Louisiana, ranking #91 among the 109 flowers on our Louisiana list. ^iNaturalist