Seed Collecting Dates

 

As part of the prairie and oak savanna restoration we are carrying out at Pleasant Valley Conservancy, we have been reseeding areas that have been cleared of undesirable vegetation. All reseeding has been with locally collected seeds. The seed collecting dates presented here are based on a five-year record. For species that we have not collected, we have obtained dates from other sources, such as the Dane County Parks Department and the Madison Audubon Society.

Two tables are given here, one organized by seed collecting date, the other by species.

The dates must be considered only a guide. There is considerable year-to-year variability in seed maturation dates, due to variation in weather. There is also site-to-site variability, depending on soil, sun, and competition. The table provides a range of dates when seed collecting might be profitable.

It should be emphasized that considerable experience is needed when deciding if seeds of a given species are ripe. Populations of desired species should be located well ahead of time, while still in flower, and assessed frequently for ripeness. Using our table as a guide, check the seeds early and, if possible, continue checking at half-weekly intervals (weekly intervals at the longest). Maturity should be checked carefully with a fingernail and in some cases with a hand lens.

Some species retain mature seeds for long periods of time, whereas others lose their seeds quickly. The ideal situation for the novice is to work in the field with experienced seed collectors. Volunteering for seed collecting activities with groups that have a lot of experience, such as Madison Audubon Society, Dane County Parks, and the Prairie Enthusiasts, is highly recommended.

Seed Collecting Arranged by Date

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

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

 

 

Seed Collecting Arranged by Species

For an Adobe Acrobat printable version of this table, 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