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This table gives ranges of dates for seed collecting of prairie species in southern Wisconsin. Over 200 species are listed. Another table gives the data arranged chronologically and can be viewed at the following link. This link also provides some background on seed collecting.

For an Adobe Acrobat printable version of the table below, please click here.

Latin name Common name Seed collecting dates Actaea alba White baneberry Mid August-Early September Actaea rubra Red baneberry Mid July-Early August Agastache foeniculum Blue giant hyssop Early September Agastache nepetoides Yellow giant hyssop Late September-October Agrimonia gryposepala Tall agrimony August-Early September Allium canadense Wild garlic Early July Allium cernuum Nodding wild onion Late August-September Amorpha canescens Lead-plant Late August-September Amphicarpaea bracteata Hog peanut Mid-September Andropogon gerardii Big bluestem Late September-October Anemone canadensis Meadow anemone Early August Anemone cylindrica Thimbleweed Late August-Early October Anemone patens Pasque flower Late May Anemone virginiana Tall anemone Late August-October Angelica atropurpurea Great angelica All July Antennaria neglecta Field pussytoes Late May-Early June Antennaria plantaginifolia Plantain-leaved pussytoes Late May-Early June Apocynum cannabinum Hemp-dogbane Mid-September Aquilegia canadensis Wild columbine Mid June-Mid July Arabis canadensis Sickle pod Late July-Mid September Aralia racemosa Spikenard Mid September Arisaema triphyllum Jack-in-the-pulpit All September Arnoglossum atriplicifolium Pale Indian-plantain All September Asclepias exaltata Poke milkweed All October Asclepias incarnata Swamp milkweed Late September Asclepias purpurascens Purple milkweed Early October Asclepias syriaca Common milkweed Late September-October Asclepias tuberosa Butterfly weed Late September-October Asclepias verticillata Whorled milkweed Mid-Late September Asclepias viridiflora Short green milkweed Mid-Late September Aster ericoides Heath aster Late October Aster laevis Smooth blue aster Late October Aster lateriflorus Side flowering aster Late October-Early November Aster novae-angliae New England aster Mid-Late October Aster oolentangiensis Sky-blue aster Mid-Late October Aster puniceus Swamp aster Mid-Late October Aster sagittifolius Arrow-leaved aster Mid-Late October Aster sericeus Silky aster Mid-Late October Astragalus canadensis Milk vetch All September Aureolaria grandiflora Yellow false foxglove Late September-October Baptisia alba White wild indigo Mid August-Early September Baptisia bracteata Cream wild indigo Early September Bidens sp Beggar's tick Mid October Blephilia ciliata Downy wood mint Mid July Bouteloua curtipendula Side oats grama Mid August-Early October Bouteloua hirsuta Hairy grama Mid August Bromus altissimus Woodland brome Late August-Early October Bromus ciliatus Fringed brome All August Bromus kalmii Kalm's brome Late July-Mid September Camassia scilloides Wild hyacinth Early July Campanula americana Tall bellflower Late September Campanula rotundifolia Harebell Mid August-Mid September Carex bicknellii Bicknell's sedge Mid September Carex pensylvanica Pennsylvania sedge Mid July Carex rosea Sedge Mid July Castilleja coccinea Indian paintbrush Late July Castilleja sessiliflora Downy paintbrush Late July Ceanothus americanus New Jersey tea September-Mid October Ceanothus herbaceous Inland New Jersey tea Early July Chamaecrista fasciculata Golden cassia Early September Chelone glabra Turtlehead Late September-October Cicuta maculata Water-hemlock Early August Cirsium altissimum Woodland thistle Late September Cirsium discolor Pasture thistle Late September Cirsium muticum Swamp thistle Late August-Mid September Comandra umbellata False toadflax Early July Coreopsis palmata Prairie tickseed Late September-October Cryptotaenia canadensis Honewort Mid August-Early September Cypripedium calceolus pubescens Large yellow lady-slipper All October Dalea candida White prairie clover Late August-September Dalea purpureum Purple prairie clover Late August-September Desmodium canadense Showy tick-trefoil Late August-September Desmodium glutinosum Pointed tick-trefoil August-Mid September Desmodium illinoense Illinois tick-trefoil Early August-Early September Dodecatheon meadia Shooting star July-Early August Echinacea pallida Pale purple coneflower Early September Elymus canadensis Canada wild rye Early September Elymus hystrix Bottlebrush grass All August Elymus riparius Woodland rye Late August- Early October Elymus villosus Silky wild rye Late July-Mid September Elymus virginicus Virginia wild rye Late October-Early November Eragrostis spectabilis Purple Lovegrass Late August Erigeron pulchellus Robin's plantain Late May Eryngium yuccifolium Rattlesnake master Mid September-Early October Eupatorium altissimum Upland boneset Early October Eupatorium maculatum Spotted Joe-Pye-weed Early September-Early October Eupatorium perfoliatum Common boneset Early September-Early October Eupatorium purpureum Purple joe-pye weed Mid-Late September Eupatorium sessilifolium Woodland boneset Late September-Early October Euphorbia corollata Flowering spurge Mid August-Mid September Euthamia graminifolia Grass-leaved goldenrod Mid October Festuca subverticillata Nodding fescue Early August Galium boreale Northern bedstraw Early August Gaura biennis Gaura Mid September Gentiana alba Cream gentian Early November Gentiana andrewsii Bottle gentian Late September-October Gentianella quinquefolia Stiff gentian Mid-Late October Geranium maculatum Wild geranium Mid-Late June Geum canadense White avens Mid August Geum triflorum Prairie smoke Late May Gnaphalium obtusifolium Old field balsam Mid-Late September Goodyera sp Rattlesnake plantain All September Hasteola suaveolens Sweet Indian plantain Late September Helenium autumnale Sneezeweed Late September-October Helianthemum bicknellii Bicknell's rock rose Early July Helianthemum canadense Rock rose Late July Helianthus grosseserratus Saw-toothed sunflower Late September-Early October Helianthus occidentalis Naked-stemmed sunflower Late September Helianthus pauciflorus Prairie sunflower Late September Helianthus strumosus Woodland sunflower Early September Heliopsis helianthoides False sunflower (ox-eye) Early August Heuchera richardsonii Prairie alum-root Mid-Late June Hieracium kalmii Canada hawkweed Late August-October Hieracium longipilum Hairy hawkweed Early August Hypericum pyramidatum Great St. John's wort Late September-October Koeleria macrantha June grass All August Krigia biflora False dandelion (Cynthia) Late June-Early July Kuhnia eupatorioides False boneset All September  Lactuca canadensis Wild lettuce Early September Lathyrus venosus Veiny pea Early August Lespedeza capitata Round-headed bush clover September-Early October Liatris aspera Rough blazing star Mid September-Early October Liatris cylindracea Dwarf blazing star Mid September-Early October Liatris pycnostachya Prairie blazing star Mid September-Early October Liatris spicata Dense gay-feather Mid October Lilium michiganense Turk's cap lily All October Lilium philadelphicum Wood lily Mid-Late October Linum medium texanum Small yellow flax Mid August-Late October Lithospermum canescens Hoary puccoon Early August Lithospermum incisum Fringed puccoon Late June-Mid July Lobelia cardinalis Cardinal flower All October Lobelia inflata Indian tobacco Early November Lobelia siphilitica Great blue lobelia Mid September-Mid October Lobelia spicata Pale spiked lobelia Mid July-Early August Lupinus perennis Wild lupine Mid-Late June Lysimachia ciliata Fringed loosestrife Mid-Late September Monarda fistulosa Wild bergamot Mid August-Late September Monarda punctata Dotted horsemint Mid September Napaea dioica Glade mallow Late August-Mid September Oenothera biennis Common evening-primrose Mid August-Mid October Opuntia humifusa Prickly-pear cactus Early August Osmorhiza longistylis Smooth sweet cicely Mid July-Late August Oxalis violacea Violet wood-sorrel Early June Packera (Senecio) pauperculus Balsam ragwort Mid-Late June Packera (Senecio) plattensis Prairie ragwort Late May-Early June Panax quinquefolium Ginseng Mid September Panicum latifolium Broad-leaved panic grass Early July Panicum virgatum Switch grass Late August-Early October Parthenium integrifolium Wild quinine Late August-Early October Pedicularis canadensis Wood betony Early-Mid June Pedicularis lanceolata Swamp betony (lousewort) All October Pediomelum esculentum Pomme-de-prairie Early-Mid July Penstemon grandiflorus Large bear-tongue Early August Phlox glaberrima Smooth phlox Mid September Phlox pilosa Downy phlox Mid July Phryma leptostachya Lopseed Mid August-Late September Physalis virginiana Ground cherry Mid September Polemonium reptans Jacob's ladder Late June-Early July Polygala senega Seneca snakeroot Late June-Early July Polygala sp Milkwort Late August-Mid September Polygonatum biflorum Smooth Solomon's seal Mid August-Mid October Polygonum virginianum Woodland knotweed Early September Polytaenia nuttallii Prairie parsley Early September Potentilla argentea Silvery cinquefoil Mid August Potentilla arguta Prairie cinquefoil Mid August-Early October Prenanthes alba Lion's foot Late September-Late October Prenanthes crepidinea Great white-lettuce Mid October Pycnanthemum virginianum Common mountain mint Early September-Late October Pyrola sp Shinleaf Mid-September Ranunculus abortivus Small-flowered buttercup Mid June Ratibida pinnata Yellow coneflower September-Early October Rosa sp. Rose Mid September-Mid October Rudbeckia hirta Black-eyed Susan Mid September-Mid October Rudbeckia triloba Brown-eyed Susan All October Sanguinaria canadensis Blood root Early June Saxifraga pensylvanica Swamp saxifrage Mid June Scheuchzeria palustris Arrow grass Mid June Schizachyrium scoparium Little bluestem Late September-Late October Scrophularia marilandica Late figwort Early August Scutellaria sp Skullcap Mid June-Early July Silphium integrifolium Rosinweed Early September-Mid October Silphium laciniatum Compass plant Early-Late September Silphium perfoliatum Cup plant Late August-Late September Silphium terebinthinaceum Prairie dock Early-Mid September Sisyrinchium angustifolium Narrow-leaved blue-eyed grass Mid June Sisyrinchium campestre Blue-eyed grass Mid June-Early July Smilacina racemosa False Solomon's seal Mid August-Late October Smilax herbacea herbacea Carrion flower Early October Solidago flexicaulis Zig zag goldenrod Late October-Early November Solidago juncea Early goldenrod October Solidago missouriensis Missouri goldenrod October Solidago nemoralis Old-field goldenrod (grey; dye Mid October-Early November Solidago ptarmacoides Stiff aster Mid September-Late October Solidago rigida Stiff goldenrod Mid-Late October Solidago speciosa Showy goldenrod October-Early November Solidago ulmifolia Elm-leaved goldenrod October-Early November Sorghastrum nutans Indian grass Mid September-Mid October Spartina pectinata Prairie cord grass Mid August Sporobolus heterolepis Prairie dropseed Late August-Late September Stipa spartea Needle grass Mid-Late June Taenidia integerrima Yellow pimpernel Late July-Early August Tephrosia virginiana Goat's-rue Early-Mid September Teucrium canadense Germander Late August-Mid September Thalictrum dasycarpum Purple meadow-rue Early August-Mid September Thalictrum dioicum Early meadow-rue Early-Late June Tradescantia ohiensis Common spiderwort Early-Mid July Triosteum perfoliatum Early horse gentian Mid September-Late October Verbena hastata Blue vervain Late August-Late September Verbena stricta Hoary vervain Early September-Early October Verbena urticifolia White vervain Late August-Late September Vernonia fasciculata Common ironweed Late September-Mid October Veronicastrum virginicum Culver's root Late August-Late September Viburnum prunifolium Black haw Early October Viola canadensis Tall white violet Mid June Viola pedata Bird's foot violet Late May-Mid June Zigadenus elegans glaucus White camas lily Early August Zizia aptera Heart-leaved golden alexander Early August Zizia aurea Golden Alexander Early August-Mid September

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