Quick answer: 64 native Iowa plants have a recorded bloom range that includes July.
64 species
- American basswood Tilia americana · 32 states
- American bellflower Campanulastrum americanum · 19 states
- Arctic brome (Kalm's brome) Bromus kalmii · 5 states
- Black-eyed Susan Rudbeckia hirta · 42 states
- Blue grama Bouteloua gracilis · 15 states
- Blue vervain Verbena hastata · 11 states
- Butterflyweed Asclepias tuberosa · 37 states
- Cardinal flower Lobelia cardinalis · 37 states
- Chokecherry Prunus virginiana · 35 states
- Common buttonbush Cephalanthus occidentalis · 23 states
- Common evening primrose Oenothera biennis · 12 states
- Common sneezeweed Helenium autumnale · 13 states
- Common snowberry Symphoricarpos albus · 7 states
- Compass plant Silphium laciniatum · 11 states
- Coralberry Symphoricarpos orbiculatus · 20 states
- Culver's root Veronicastrum virginicum · 8 states
- Cup plant Silphium perfoliatum · 17 states
- Eastern purple coneflower Echinacea purpurea · 22 states
- Eastern red columbine Aquilegia canadensis · 36 states
- Fall obedient plant Physostegia virginiana · 21 states
- Fireweed Chamerion angustifolium · 28 states
- Flowering spurge Euphorbia corollata · 6 states
- Foxglove beardtongue Penstemon digitalis · 31 states
- Golden alexanders Zizia aurea · 12 states
- Gray dogwood Cornus racemosa · 8 states
- Grayhead coneflower Ratibida pinnata · 12 states
- Great blue lobelia Lobelia siphilitica · 32 states
- Harebell Campanula rotundifolia · 25 states
- Highbush cranberry Viburnum opulus var. americanum · 8 states
- Leadplant Amorpha canescens · 10 states
- Little bluestem Schizachyrium scoparium · 23 states
- Low prickly pear Opuntia humifusa · 6 states
- Mexican hat Ratibida columnifera · 17 states
- Michigan lily Lilium michiganense · 5 states
- Narrow-leaf coneflower Echinacea angustifolia · 9 states
- New Jersey tea Ceanothus americanus · 31 states
- Northern bush honeysuckle Diervilla lonicera · 5 states
- Partridge pea Chamaecrista fasciculata · 13 states
- Prairie dropseed Sporobolus heterolepis · 11 states
- Prairie goldenrod Solidago nemoralis · 7 states
- Prairie ironweed Vernonia fasciculata · 7 states
- Prairie rosinweed (prairie dock) Silphium terebinthinaceum · 4 states
- Prairie tickseed Coreopsis palmata · 4 states
- Purple meadow-rue Thalictrum dasycarpum · 7 states
- Rocky Mountain bee plant Peritoma serrulata · 22 states
- Roundhead lespedeza Lespedeza capitata · 7 states
- Showy tick trefoil Desmodium canadense · 21 states
- Shrubby St. John's-wort Hypericum prolificum · 12 states
- Sideoats grama Bouteloua curtipendula · 25 states
- Smooth oxeye Heliopsis helianthoides · 12 states
- Smooth rose Rosa blanda · 8 states
- Smooth sumac Rhus glabra · 34 states
- Staghorn sumac Rhus typhina · 13 states
- Swamp milkweed Asclepias incarnata · 25 states
- Sweet Joe-Pye Eutrochium purpureum · 17 states
- Sweet coneflower Rudbeckia subtomentosa · 4 states
- Virginia mountain mint Pycnanthemum virginianum · 5 states
- White meadowsweet Spiraea alba · 8 states
- White turtlehead Chelone glabra · 3 states
- White wild indigo Baptisia alba · 10 states
- Wholeleaf rosinweed Silphium integrifolium · 5 states
- Whorled milkweed Asclepias verticillata · 6 states
- Wild geranium Geranium maculatum · 11 states
- Wood lily Lilium philadelphicum · 7 states