Quick answer: 28 butterfly and moth host plants are native to Illinois, 28 with a live listing as of 16 Sep 2026.
28 species
- Big bluestem Andropogon gerardii · 25 states
- Black cherry Prunus serotina · 32 states
- Black-eyed Susan Rudbeckia hirta · 42 states
- Bur oak Quercus macrocarpa · 24 states
- Butterflyweed Asclepias tuberosa · 37 states
- Canada wild rye Elymus canadensis · 18 states
- Canadian wild ginger Asarum canadense · 8 states
- Common hackberry Celtis occidentalis · 15 states
- Common winterberry Ilex verticillata · 10 states
- Eastern red columbine Aquilegia canadensis · 36 states
- Fireweed Chamerion angustifolium · 28 states
- Golden alexanders Zizia aurea · 12 states
- Indiangrass Sorghastrum nutans · 19 states
- Kentucky coffeetree Gymnocladus dioicus · 15 states
- Little bluestem Schizachyrium scoparium · 23 states
- Nannyberry Viburnum lentago · 23 states
- New Jersey tea Ceanothus americanus · 31 states
- Paper birch Betula papyrifera · 16 states
- Partridge pea Chamaecrista fasciculata · 13 states
- Quaking aspen Populus tremuloides · 24 states
- Red-osier dogwood Cornus sericea · 22 states
- Showy tick trefoil Desmodium canadense · 21 states
- Sideoats grama Bouteloua curtipendula · 25 states
- Sundial lupine Lupinus perennis · 25 states
- Swamp milkweed Asclepias incarnata · 25 states
- Switchgrass Panicum virgatum · 24 states
- Virginia creeper Parthenocissus quinquefolia · 27 states
- White oak Quercus alba · 33 states