• Andropogon gerardii Big Bluestem
• Cenchrus longispinus Sandbur
• Danthonia spicata Poverty Grass
• Elymus canadensis Wild Rye
• Elymus virginicus Terrell Grass
• Eragrostis pectinacea Purple Love Grass
• Hordeum jubatum Squirrel-tail Grass
• Hystrix patula Bottlebrush Grass
• Panicum virgatum Switchgrass
• Phragmites autralis Reed
• Schizachyrium scoparium Little Bluestem
• Sorghastrum nutans Indian Grass
• Spartina patens Salt-meadow Cord Grass
• Spartina pectinata Prairie Cord Grass

Prairie sites reach their peak of bloom between late July and mid August each year. The best sites for seeing a profusion of wildflowers are Tallgrass Prairie Heritage Park, Spring Garden Prairie (off Spring Garden Road) and the Ojibway Prairie Provincial Nature Reserve.

The following plants begin to bloom in July or August:

Agrimonia parviflora Agrimony Aletris farinosa Colic root Alisma plantago-aquatica Water-plaintain Amphicarpa bracteata Hog-peanut Apios americana Ground-nut Asclepias sulivantii Sullivant's Milkweed Asclepias tuberosa Butterfly Milkweed Aster laevis Smooth Aster Aster umbellatus Flat-topped Aster Aureolaria virginica False Foxglove Ceanothus americanus New Jersey Tea Centaurea maculosa Spotted Knapweed Centaurium pulchellum Branched Centaury Cicuta maculata Spotted Cowbane Cirsium discolor Field Thistle Cirsium muticum Swamp Thistle Clematis virginiana Virgin's Bower Coreopsis tripteris Tall Coreopsis Desmodium canadense Showy Tick-trefoil Dioscorea villosa Wild Yam Epilobium coloratum Willow-herb Eupatorium maculatum Spotted Joe-Pye Weed Eupatorium perfoliatum Boneset Euphorbia corollata Flowering Spurge Gaura biennis Biennial Gaura Gerardia purpurea Purple Gerardia Gerardia tenuifolia Slender Gerardia Hackelia virginiana Stickseed Helianthus divaricatus Woodland Sunflower Helianthus giganteus Tall Sunflower Hypericum gentianoides Orange-grass Hypericum punctatum Spotted St. John's-wort Impatiens capensis Spotted Touch-me-not Juncus effusus Soft Rush Juncus tenuis Path Rush Juncus torreyi Coville Lactuca biennis Tall Blue Lettuce Lechea leggettii Pinweed Lechea villosa Hairy Pinweed Lespedeza capitata Round-headed Bush-clover Lespedeza hirta Hairy Bush-clover Lespedeza intermedia Wand Bush-clover Lespedeza virginica Slender Bush-clover Liatris spicata Spiked Blazing Star Lilium michiganense Michigan Lily Lilium philadelphicum Wood Lily Lindernia dubia Water Pimpernel Lobelia cardinalis Cardinal Flower Lobelia siphilitica Great Blue Lobelia Ludwigia alternifolia Rattle-box Ludwigia polycarpa Many-seeded Ludwigia Lycopus americanus Cut-leaved Water-horehound Lythrum alatum Wing-angled Loosestrife Mentha arvensis Common Mint Mimulus ringens Monkey Flower Monarda fistulosa Wild Bergamot

Oenothera biennis Common Evening Primrose Oxypolis rigidior Cowbane Pedicularis lanceolata Swamp Lousewort Polygala sanguinea Field Milkwort Polygala verticillata Whorled Milkwort Polygonum tenue Slender Knotweed Prenanthes alba White Lettuce Prenanthes racemosa Glaucous White Lettuce Pycnanthemum virginianum Virginia Mountain Mint Ratibida pinnata Gray-headed Coneflower Rhus copallina Winged Sumac Rudbeckia hirta Black-eyed Susan Sagittaria latifolia Duck Potato Saponaria officinalis Bouncing Bet Scirpus atrovirens Dark Green Bulrush Scutellaris laterifolia Mad-dog Skullcap Silphium terebinthinaceum Prairie Dock Solidago bicolor Silver Goldenrod Solidago canadensis Canada Goldenrod Solidago graminifolia Flat-topped Goldenrod Solidago juncea Early Goldenrod Spiraea tomentosa Hardhack Steironema quadriflorum Prairie Loosestrife Strophostyles helvola Trailing Wild Bean Teucrium canadense Germander Tradescantia ohiensis Ohio Spiderwort Urtica dioica Slender Nettle Verbena hastata Blue Vervain Verbena stricta Hoary Vervain Vernonia missourica Missouri Ironweed Veronicastrum virginicumCulver's Root