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Selected Wildflowers of Howard County
Maryland - Checklist
by Robert Solem

	Blooming Dates
  Early Late Latin Name (English Name)
  ==== ==== ============================== ==== ====
  07-C 10-C Acalypha rhomboidea (Mercury, Three-seeded)
  05-C 12-C Achillea millefolium (Yarrow)
  07-B 09-C Agrimonia gryposepala (Agrimony, Tall)
  07-E 10-B Agrimonia parviflora (Agrimony, Small-flowered)
  07-B 09-C Alisma subcordatum (Water-plantain, Small)
            Alliaria officinalis (SEE Alliaria petiolata)
  04-C 08-C Alliaria petiolata (Mustard, Garlic)
  06-B 08-C Allium vineale (Garlic, Field)
  08-B 09-E Ambrosia artemisiifolia (Ragweed, Common)
  07-E 10-B Ambrosia trifida (Ragweed, Great)
  08-B 09-C Amphicarpaea bracteata (Hog-peanut)
  06-B 08-E Anemone virginiana (Thimbleweed)
  03-C 06-C Anemonella thalictroides (Rue-anemone)
  04-B 05-C Antennaria neglecta (Pussytoes, Field)
  05-B 11-E Anthemis cotula (Mayweed)
  06-B 09-C Apocynum cannabinum (Indian Hemp)
  07-B 11-B Arctium minus (Burdock, Common)
  04-B 06-B Arisaema triphyllum (Jack-in-the-pulpit)
  04-B 06-C Asarum canadense (Ginger, Wild)
  06-B 08-C Asclepias syriaca (Milkweed, Common)
  06-C 09-C Asclepias tuberosa (Butterfly Weed)
  07-B 10-E Aster divaricatus (Aster, White Wood)
  08-B 11-C Aster lanceolatus (Aster, Panicled)
  08-E 11-B Aster puniceus (Aster, Purple-stemmed)
            Aster simplex (SEE Aster lanceolatus)
  04-C 07-C Barbarea vulgaris (Cress, Winter)
  09-B 10-E Bidens frondosa (Beggar-ticks)
  08-E 11-B Bidens polylepis (Tickseed-sunflower)
  07-B 09-E Boehmeria cylindrica (Nettle, False)
  03-E 10-E Brassica rapa (Mustard, Field)
  05-E 10-B Calystegia sepium (Bindweed, Hedge)
            Cardamine bulbosa (SEE Cardamine rhomboidea)
  02-C 06-C Cardamine pensylvanica (Bittercress, Pennsylvania)
  04-B 05-E Cardamine rhomboidea (Cress, Spring)
  07-C 09-E Cassia nictitans (Sensitive Plant, Wild)
  04-C 09-E Cerastium vulgatum (Chickweed, Mouse-ear)
  06-C 11-E Chenopodium album (Lamb's Quarters)
  06-C 09-B Chimaphila maculata (Wintergreen, Striped/Spotted)
  05-B 12-B Chrysanthemum leucanthemum (Daisy, Oxeye)
  08-C 10-E Chrysopsis mariana (Golden Aster, Maryland)
  05-E 11-C Cichorium intybus (Chicory)
  06-C 09-B Cimicifuga racemosa (Cohosh, Black)
  06-C 08-C Circaea lutetiana (Nightshade, Enchanter's)
            Circaea quadrisulcata (SEE Circaea lutetiana)
  06-B 10-E Cirsium arvense (Thistle, Canada)
  06-C 10-E Cirsium discolor (Thistle, Field)
  07-B 11-B Cirsium vulgare (Thistle, Bull)
  03-B 05-E Claytonia virginica (Spring Beauty)
  08-B 10-C Collinsonia canadensis (Horse-balm)
  06-B 10-C Commelina communis (Dayflower, Asiatic)
            Convolvulus sepium (SEE Calystegia sepium)
  07-E 11-E Conyza canadensis (Horseweed)
  05-B 10-E Coronilla varia (Crown Vetch)
  03-E 05-C Corydalis flavula (Corydalis, Yellow)
  06-B 08-C Cryptotaenia canadensis (Honewort)
  07-C 10-B Cuscuta gronovii (Dodder, Common)
  06-B 11-E Daucus carota (Queen Anne's Lace)
  03-E 05-C Dentaria heterophylla (Toothwort, Slender)
  03-E 05-C Dentaria laciniata (Toothwort, Cut-leaved)
  07-B 09-E Desmodium canescens (Tick-trefoil, Hoary)
  07-B 10-C Desmodium nudiflorum (Tick-trefoil, Naked-flowered)
  07-B 09-E Desmodium paniculatum (Tick-trefoil, Panicled)
  05-C 11-C Dianthus armeria (Pink, Deptford)
  05-B 06-E Dioscorea quaternata (Yamroot, Four-leaved)
  02-B 05-B Draba verna (Whitlow Grass)
  03-E 10-B Duchesnea indica (Strawberry, Indian)
  07-E 10-E Erechtites hieraciifolia (Pilewort)
  05-B 11-B Erigeron annuus (Fleabane, Daisy)
            Erigeron canadensis (SEE Conyza canadensis)
  04-E 09-E Erigeron philadelphicus (Fleabane, Common)
  03-C 05-B Erythronium americanum (Trout Lily)
  07-C 10-E Eupatorium coelestimum (Mistflower)
  07-E 10-E Eupatorium fistulosum (Joe-Pye Weed, Hollow)
  07-C 10-C Eupatorium perfoliatum (Boneset)
  08-B 10-C Eupatorium rugosum (Snakeroot, White)
  06-C 11-B Euphorbia corollata (Spurge, Flowering)
  07-E 11-C Euphorbia maculata (Spurge, Upright Spotted)
  06-C 10-C Euphorbia supina (Spurge, Prostrate)
  04-B 06-B Fragaria virginiana (Strawberry, Common/Wild)
  05-B 06-B Galium aparine (Cleavers)
  06-B 10-C Galium asprellum (Bedstraw, Rough)
  05-E 06-E Galium circaezans (Licorice, Wild)
  05-B 06-E Geranium carolinianum (Cranesbill, Carolina)
  04-E 06-E Geranium maculatum (Geranium, Wild)
  06-C 10-C Geum canadense (Avens, White)
  03-B 07-B Glechoma hederacea (Gill-over-the-ground)
  08-C 11-C Gnaphalium obtusifolium (Everlasting, Sweet)
  07-C 08-E Goodyera pubescens (Rattlesnake-plantain, Downy)
  04-B 07-B Hedyotis caerulea (Bluets)
  05-C 09-C Hedyotis purpurea (Houstonia, Large)
  07-B 10-C Helianthus tuberosus (Jerusalem Artichoke)
  06-B 08-B Hemerocallis fulva (Day-lily)
  03-B 05-B Hepatica americana (Hepatica, Round-lobed)
  05-C 07-E Heuchera americana (Alumroot)
  05-C 08-E Hieracium caespitosum (Hawkweed, Field)
            Hieracium pratense (SEE Hieracium caespitosum)
  05-C 09-B Hieracium venosum (Rattlesnake-weed)
            Houstonia caerulea (SEE Heyotis caerulea)
            Houstonia purpurea (SEE Hedyotis purpurea)
  06-B 10-C Hypericum perforatum (St. Johnswort, Common)
  06-C 09-B Hypericum punctatum (St. Johnswort, Spotted)
  06-C 10-E Impatiens capensis (Touch-me-not, Spotted)
  07-C 09-B Ipomoea pandurata (Potato Vine, Wild)
  06-B 09-E Lactuca canadensis (Lettuce, Wild)
  07-C 10-B Lactuca floridana (Lettuce, Florida Blue)
  02-E 06-B Lamium purpureum (Dead-nettle, Purple)
  03-E 07-B Lepidium campestre (Peppergrass, Field)
  04-E 10-C Lepidium virginicum (Peppergrass, Wild)
  08-E 10-B Lespedeza cuneata (Bush-clover, Sericea)
  07-C 10-B Lobelia cardinalis (Cardinal-flower)
  07-C 11-E Lobelia inflata (Indian Tobacco)
	
	Blooming Dates
  Early Late Latin Name (English Name)
  ==== ==== ============================= ==== ====
  07-B 09-E Ludwigia alternifolia (Seedbox)
  06-B 09-E Lactuca canadensis (Lettuce, Wild)
  07-C 10-B Lactuca floridana (Lettuce, Florida Blue)
  02-E 06-B Lamium purpureum (Dead-nettle, Purple)
  03-E 07-B Lepidium campestre (Peppergrass, Field)
  04-E 10-C Lepidium virginicum (Peppergrass, Wild)
  08-E 10-B Lespedeza cuneata (Bush-clover, Sericea)
  07-C 10-B Lobelia cardinalis (Cardinal-flower)
  07-C 11-E Lobelia inflata (Indian Tobacco)
  07-B 09-E Ludwigia alternifolia (Seedbox)
            Lychnis alba (SEE Silene latifolia)
  07-B 09-E Lycopus uniflorus (Bugleweed, Northern)
  07-E 09-E Lycopus virginicus (Bugleweed, Virginia)
  06-C 08-C Lysimachia ciliata (Loosestrife, Fringed)
  06-B 08-E Lysimachia quadrifolia (Loosestrife, Whorled)
  05-B 07-B Medeola virginiana (Indian Cucumber-root)
  04-E 10-B Medicago lupulina (Medick, Black)
  05-E 10-E Melilotus alba (Clover, White Sweet)
  05-C 10-E Melilotus officinalis (Clover, Yellow Sweet)
  07-C 09-C Mimulus ringens (Monkeyflower, Square-stem)
  06-B 10-C Monotropa uniflora (Indian Pipe)
  06-B 11-E Oenothera biennis (Evening-primrose, Common)
  04-B 06-B Ornithogalum umbellatum (Star-of-Bethlehem)
  04-E 05-E Osmorhiza claytonii (Cicely, Sweet)
  04-E 05-E Osmorhiza longistylis (Aniseroot)
            Oxalis europaea (SEE Oxalis stricta)
  04-E 11-E Oxalis stricta (Wood-sorrel, Yellow)
  08-B 10-C Perilla frutescens (Perilla)
  06-E 08-C Phryma leptostachya (Lopseed)
  06-B 10-E Phytolacca americana (Pokeweed)
  08-B 10-C Pilea pumila (Clearweed)
  05-B 10-E Plantago lanceolata (Plantain, English)
  05-E 10-B Plantago rugelii (Plantain, Broadleaved/Common)
  04-C 05-E Podophyllum peltatum (May-apple)
  05-B 06-C Polygonatum biflorum (Solomon's Seal)
  07-B 11-B Polygonum pensylvanicum (Smartweed, Pennsylvania)
  06-E 10-E Polygonum perfoliatum (Tearthumb, Perfoliate)
  05-E 11-C Polygonum persicaria (Lady's Thumb)
  07-B 11-B Polygonum sagittatum (Tearthumb, Arrow-leaved)
  07-E 10-B Polygonum scandens (Buckwheat, Climbing False)
  07-B 09-E Polygonum virginianum (Knotweed, Virginia)
  04-C 06-C Potentilla canadensis (Cinquefoil, Dwarf)
  05-E 09-B Potentilla recta (Cinquefoil, Rough-fruited)
  04-E 07-C Potentilla simplex (Cinquefoil, Common)
  06-E 11-B Prunella vulgaris (Heal-all)
            Pycnanthemum flexuosum (SEE Pycnanthemum tenuifolium)
  06-C 10-B Pycnanthemum tenuifolium (Mountain-mint, Narrow-leaved)
  04-B 07-B Ranunculus abortivus (Buttercup, Kidneyleaf)
  04-C 07-C Ranunculus bulbosus (Buttercup, Bulbous)
  06-B 11-E Rudbeckia hirta (Black-eyed Susan)
  07-B 11-B Rudbeckia laciniata (Coneflower, Green-headed/Tall)
            Rudbeckia serotina (SEE Rudbeckia hirta)
  04-C 07-E Rumex acetosella (Sorrel, Sheep)
  05-C 08-B Rumex crispus (Dock, Curled)
  05-E 08-C Rumex obtusifolius (Dock, Bitter/Broad)
  06-C 09-E Sagittaria latifolia (Arrowhead, Broad-leaved)
  03-C 05-C Sanguinaria canadensis (Bloodroot)
  06-B 08-B Sanicula canadensis (Snakeroot, Short-styled)
  05-B 06-E Sanicula gregaria (Snakeroot, Clustered)
  06-E 10-C Saponaria officinalis (Bouncing Bet)
  06-E 10-B Satureja vulgaris (Basil, Wild)
  03-E 05-C Saxifraga virginiensis (Saxifrage, Early)
  06-B 07-B Scutellaria elliptica (Skullcap, Hairy)
  04-C 06-C Senecio aureus (Ragwort, Golden)
  04-E 10-B Silene latifolia (Campion, White)
  07-B 09-B Silene stellata (Campion, Starry)
  05-C 07-C Sisyrinchium angustifolium (Blue-eyed Grass)
            Sisyrinchium graminoides (SEE Sisyrinchium angustifolium)
  04-C 06-B Smilacina racemosa (Solomon's Seal, False)
  06-B 10-B Solanum carolinense (Horse-nettle)
  05-E 09-B Solanum dulcamara (Nightshade, Bittersweet)
            Solidago altissima (SEE Solidago canadensis)
  07-E 10-C Solidago bicolor (Silverrod)
  07-E 11-B Solidago caesia (Goldenrod, Blue-stemmed)
  08-E 11-E Solidago canadensis (Goldenrod, Canada)
  08-E 10-E Solidago gramminifolia (Goldenrod, Lance-leaved)
  07-B 10-B Solidago juncea (Goldenrod, Early)
  08-E 11-E Solidago rugosa (Goldenrod, Rough-stemmed)
            Specularia perfoliata (SEE Triodanis perfoliata)
  05-C 06-C Stellaria longifolia (Stitchwort, Long-leaved)
  02-C 12-E Stellaria media (Chickweed, Common)
  03-C 06-B Stellaria pubera (Chickweed, Star)
  01-B 04-E Symplocarpus foetidus (Skunk Cabbage)
  01-B 12-E Taraxacum officinale (Dandelion, Common)
  06-E 09-E Teucrium canadense (Germander, American)
            Thalictrum polygamum (SEE Thalictrum pubescens)
  05-E 08-B Thalictrum pubescens (Meadow-rue, Tall)
            Tovara virginiana (SEE Polygonum virginianum)
  05-C 10-B Trifolium agrarium (Clover, Hop)
  05-E 11-B Trifolium arvense (Clover, Rabbit-foot)
  05-B 11-C Trifolium pratense (Clover, Red)
  04-E 11-C Trifolium repens (Clover, White)
  05-E 07-E Triodanis perfoliata (Venus' Looking-glass)
  03-B 05-E Tussilago farfara (Coltsfoot)
  06-C 07-E Typha latifolia (Cattail, Common)
  04-E 05-E Uvularia perfoliata (Bellwort, Perfoliate)
  05-E 10-E Verbascum blattaria (Mullein, Moth)
  06-C 11-B Verbascum thapsus (Mullein, Common)
  06-E 09-E Verbena urticifolia (Vervain, White)
  07-E 10-C Vernonia noveboracensis (Ironweed, New York)
  03-C 08-C Veronica arvensis (Speedwell, Corn)
  03-C 06-C Veronica officinalis (Speedwell, Common)
  04-B 05-E Viola cucullata (Violet, Marsh Blue)
  03-E 05-E Viola hirsutula (Violet, Southern Wood)
            Viola kitaibelliana (SEE Viola rafinesquii)
  03-C 05-E Viola papilionacea (Violet, Common Blue)
            Viola pensylvanica (SEE Viola pubescens)
  03-E 05-C Viola pubescens (Violet, Yellow)
  03-E 07-B Viola rafinesquii (Pansy, Field)
  08-B 10-C Xanthium strumarium (Clotbur)
	

The first date is earliest blooming date; the second is the latest blooming date. The number is the month (e.g., "09" is September), and the letter refers to each 10-day period (i.e., "B" is the first 10-day period of the month, "C" is the middle period, and "E" is the last period).


Recommended Reading: Newcomb's Wildflower Guide by Lawrence Newcomb ISBN 0-316-60441-0


Copyright © 1996. Howard County Bird Club, Revised - May 2004