Wildflower List & Bloom Times For Herbert Hoover National Historic Site

Purple prairie clover

NPS Photo by Erin Anfinson

A colorful pallette of flowers mixes with the green, purple, and golden hues of native grasses from April until late October. Golden alexanders, Canada anemones, spiderworts, yellow and purple coneflowers, and butterfly milkweeds blossom in spring and early summer. New England asters and numerous species of goldenrods attract monarch butterflies in late summer and early fall.

Bloom Times

Table of common species by approximate bloom times

Common Name Family, Species	Blooms
Lousewort Scrophulariaceae Pedicularis canadensis	Mid April through May
White avens Rosaceae Geum canadense	May
Blue-eyed grass Iridaceae Sisyrinchium campestre L.	May
Smooth dock Polygonaceae Rumex altissimus	May
Foxglove penstemon Scrophulariaceae Penstemon digitalis	May through late July
Cleavers Rubiaceae Galium aparine	May through late July
Goat’s rue Fabaceae Tephrosia virginiana	May through July
Prairie ragwort Asteraceae Senecio plattensis	Mid May through mid June
Large-flowered beardtongue Scrophulariaceae Penstemon grandiflorus	Late May through late June
Ohio spiderwort Commelinaceae Tradescantia ohiensis	Late May through late June
Spiderwort Commelinaceae Tradescantia bracteata	Late May through late June
Canada anemone Ranunculaceae Anemone canadensis	Late May through early July
Windflower Ranunculaceae Anemone cylindrica	Late May through early July
Purple meadow-rue Ranunculaceae Thalictrum dasycarpum	Late May through late July
Wild four-o'clock Nyctaginaceae Mirabilis nyctaginea	June and July
Fringed loosestrife Primulaceae Lysimachia ciliata	June and July
Pale purple coneflower Asteraceae Echinacea pallida	June and July
Spiked lobelia Campanulaceae Lobelia spicata	June through mid August
Ground cherry Solanaceae Physalis heterophylla	June through September
Norwegian cinquefoil Rosaceae Potentilla norvegica	June through September
White vervain Verbenaceae Verbena urticifolia	June through September
Butterfly milkweed Apocynaceae Asclepias tuberosa	Early June through late July
White wild indigo Fabaceae Baptisia lactea	Early June through late July
Black-eyed Susan Asteraceae Rudbeckia hirta	Early June through late July
Ox-eye Asteraceae Heliopsis helianthoides	Early June through July
Yellow coneflower Asteraceae Ratibida pinnata	Early June through early August
Lead plant Fabaceae Amorpha canescens	Mid June through mid July
Wild quinine Asteraceae Parthenium integrifolium	Mid June through mid July
Spotted St. John's wort Hypericaceae Hypericum punctatum	July
Blue vervain Verbenaceae Verbena hastata	July through September
Brown-eyed Susan Asteraceae Rudbeckia triloba	July through September
Obedient plant Lamiaceae Physostegia parviflora	July through September
Tall cinquefoil Rosaceae Potentilla arguta	July through early August
Purple prairie clover Fabaceae Dalea purpurea	Early July through early August
White prairie clover Fabaceae Dalea candida	Early July through early August
Compass plant Asteraceae Silphium laciniatum	Early July through early August
Wild bergamot Lamiaceae Monarda fistulosa	Early July through early August
Culver's root Scrophulariaceae Veronicastrum virginicum	July through August
Royal catchfly Caryophyllaceae Silene regia	July through August
Giant St. John's wort Hypericaceae Hypericum pyramidatum	July through August
Flowering spurge Euphorbiaceae Euphorbia corollata	July through August
Cup plant Asteraceae Silphium perfoliatum	July through September
Prairie dock Asteraceae Silphium terebinthinaceum	July through September
Tall coneflower Asteraceae Rudbeckia laciniata	July through September
Wild lettuce Asteraceae Lactuca canadensis	July through September
Partridge pea Fabaceae Cassia fasciculata	July through September
Common mountain mint Lamiaceae Pycnanthemum virginianum	July through September
Cardinal flower Campanulaceae Lobelia cardinalis	July through September
Milk vetch Fabaceae Astragalus canadensis	Mid July through mid August
Illinois tick-trefoil Fabaceae Desmodium illinoense	Mid July through mid August
Showy tick-trefoil Fabaceae Desmodium canadense	Mid July through mid August
Missouri goldenrod Asteraceae Solidago missouriensis	Mid July through late August
Evening primrose Onagraceae Oenothera biennis	Mid July through early September
Prairie blazing star Asteraceae Liatris pycnostachya	August through early September
Rosinweed Asteraceae Silphium integrifolium	August through early September
Ironweed Asteraceae Vernonia fasciculata	Early August through mid September
Great lobelia Campanulaceae Lobelia siphilitica	August through September
Showy goldenrod Asteraceae Solidago speciosa	August through September
Smooth goldenrod Asteraceae Solidago gigantea	August through September
Tall goldenrod Asteraceae Solidago canadensis	August through September
Field goldenrod Asteraceae Solidago nemoralis	Mid August through early September
Round-headed bush clover Fabaceae Lespedeza capitata	Mid August through early September
Rough blazing star Asteraceae Liatris aspera	Mid August through mid September
Stiff goldenrod Asteraceae Solidago rigida	Mid August through mid September