genus

Marsh Elders

Iva

Field notes

Iva is a genus of wind-pollinated plants in the family Asteraceae, described as a genus by Linnaeus in 1753. Plants of this genus are known generally as marsh elders. The genus is native to North America.

Accepted species

Iva angustifolia - southeastern + south-central United States (Texas Oklahoma Louisiana Arkansas Kansas Florida)

Iva annua - United States, primarily south-central region; Tamaulipas

Iva asperifolia - south-central United States (Texas Oklahoma Louisiana Arkansas Kansas Indiana), Veracruz

Iva axillaris - western United States + Canada

Iva cheiranthifolia - Cuba

Iva corbinii B.L. Turner - Texas

Iva dealbata - United States (Texas New Mexico), Mexico (Chihuahua, Coahuila, Nuevo León, San Luis Potosí)

Iva frutescens - coastal areas from Texas to Nova Scotia

Iva hayesiana - California, Baja California

Iva imbricata - coastal areas from Texas to Virginia; Bahamas

Iva microcephala - southeastern United States (Alabama Florida Georgia North Carolina South Carolina)

Iva xanthiifolia (synonym Cyclachaena xanthiifolia) - widespread in United States + Canada, introduced elsewhere

Children

Range

United States

Greener is more native, amber more introduced; paler is less certain. How this was decided

Key traits

Layer: Herbaceous plants
Plant type: Annual Perennial Wildflower

From USDA PLANTS.

Top native marsh elders All

Native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.