Friesner Herbarium

Species Approximate Flowering Dates

Common Name Scientific Name Month(s) Flowering
Golden Alexander Zizia aptera May - June
Beardtongue Penstemon digitalis May - June
Cream Wild Indigo Baptisia leucophaea May - June
Black-eyed Susan Rudbeckia hirta May - August
Flowering Spurge Euphorbia corollata May - September
False Sunflower Heliopsis helianthoides May - October
Prairie Coreopsis Coreopsis palmata May - July
Buttlerfly Weed Asclepias tuberosa June - August
Purple Coneflower Echinacea purpurea June - September
Compass Plant Silphium laciniatum June - July
Canada Wild Rye Elymus canadensis June - August
Canada Ticktrefoil Desmodium canadense June - August
Yellow Coneflower Ratibida pinnata June - August
Purple Prairie Clover Petalostemum purpureum July - August
White Prairie Clover Petalostemum canididum July - August
Prairie Dock Silphium terebinthinaceum July - September
Wild Bergamont Monarda fistulosa July - September
Prairie Cinquefoil Potentilla arguta July - August
Switchgrass Panicum virgatum July - September
Prairie Blazing Star Liatris pycnostachya July - August
Roundheaded Bush Clover Lespedesa capitata August - October
Naked Sunflower Helianthus occidentalis August - October
Big Bluestem Andropogon gerardi August - September
False Dragonhead Physotegia virginiana August - September
New England Aster Aster novae-angliae August - October
Little Bluestem Andropogon scoparium August - September
Stiff Goldenrod Solidago rigida August - October
Indian Grass Sorghastrum nutans September
Azure Aster Aster azureus September - October
Heath Aster Aster ericoides September - October