Photos by month
Click on a common name for a photo of the plant, or click on a month for photos taken in that month.
| 1 | Longleaf Pondweed | Potamogeton nodosus |
| Velvet-leaf | Abutilon theophrasti | |
| Purple-head Sneezeweed | Helenium flexuosum | |
| Early Goldenrod | Solidago juncea | |
| Creeping Water Primrose Seedbox | Ludwigia peploides subsp. glabrescens | |
| Kenilworth's Ivy | Cymbalaria muralis | |
| 2 | Whitestar Morning-glory | Ipomoea lacunosa |
| Tick-seed Sunflower | Bidens polylepis | |
| Maryland Meadowbeauty | Rhexia mariana var. mariana | |
| White Goosefoot | Chenopodium album | |
| Shrubby Bushclover | Lespedeza bicolor | |
| 3 | Bland Sweet-cicely | Osmorhiza claytonii |
| Woodland Lettuce | Lactuca floridana | |
| Perplexed Tick-trefoil | Desmodium perplexum | |
| New York Ironweed | Vernonia noveboracensis | |
| Swamp Milkweed | Asclepias incarnata subsp. pulchra | |
| 4 | Blue Cohosh | Caulophyllum thalictroides |
| Great Burdock | Arctium lappa | |
| Maryland Golden Aster | Chrysopsis mariana | |
| Swamp Jack-in-the-pulpit | Arisaema triphyllum subsp. triphyllum | |
| Fall Phlox | Phlox paniculata | |
| Square-stem Monkeyflower | Mimulus ringens | |
| Fireweed | Erechtites hieraciifolius | |
| Green Milkweed | Asclepias viridiflora | |
| Spiderflower | Tarenaya hassleriana | |
| Beechdrops | Epifagus virginiana | |
| Nodding Ladies'-tresses | Spiranthes cernua | |
| Stinking Camphorweed | Pluchea foetida var. foetida | |
| Rattlesnake-master | Eryngium aquaticum var. aquaticum | |
| 5 | Canada Horse-balm | Collinsonia canadensis |
| Spotted Jewel-weed | Impatiens capensis | |
| Tall Blue Lettuce | Lactuca biennis | |
| Virginia Smartweed | Persicaria virginiana | |
| Longbristle Smartweed | Persicaria longiseta | |
| River Wild Rye | Elymus riparius | |
| Bull Thistle | Cirsium vulgare | |
| Jerusalem Artichoke | Helianthus tuberosus | |
| Annual Honesty | Lunaria annua | |
| Light-blue Asiatic Dayflower | Commelina communis var. communis | |
| Canada Lettuce | Lactuca canadensis | |
| Purple-leaf Willowherb | Epilobium coloratum | |
| Canada Wood-nettle | Laportea canadensis | |
| Purple-top | Tridens flavus | |
| Rusty Flatsedge | Cyperus odoratus var. odoratus | |
| Wild Mock-cucumber | Echinocystis lobata | |
| Climbing Hempweed | Mikania scandens | |
| Gronovius's Dodder | Cuscuta gronovii | |
| Field Thistle | Cirsium discolor | |
| Amur Honeysuckle | Lonicera maackii | |
| Japanese Hops | Humulus japonicus | |
| Pale Jewel-weed | Impatiens pallida | |
| Solomon's Plume | Maianthemum racemosum subsp. racemosum | |
| Pokeweed | Phytolacca americana | |
| Field Basil | Clinopodium vulgare | |
| Beefsteak Plant | Perilla frutescens | |
| Great Blue Lobelia | Lobelia siphilitica | |
| 6 | American Lotus | Nelumbo lutea |
| Late-flowering Thoroughwort | Eupatorium serotinum | |
| Sagebrush Wormwood | Artemisia ludoviciana | |
| 7 | Domesticated Sunflower | Helianthus annuus |
| Broadleaf Water-plantain | Alisma subcordatum | |
| Camphorweed Goldenaster | Heterotheca subaxillaris | |
| White Turtlehead | Chelone glabra | |
| Skeletonweed | Chondrilla juncea | |
| Meadow Spikemoss | Lycopodioides apodum | |
| Spotted Knapweed | Centaurea stoebe subsp. micranthos | |
| Prickly Lettuce | Lactuca serriola | |
| Mile-a-minute | Persicaria perfoliata | |
| Tall Blue Lettuce | Lactuca biennis | |
| Canada Thistle | Cirsium arvense | |
| 8 | Forked Bluecurls | Trichostema dichotomum |
| Hairy Small-leaved Tick-trefoil | Desmodium ciliare | |
| Seabeach Amaranth | Amaranthus pumilus | |
| Ragweed | Ambrosia artemisiifolia | |
| 9 | Roundhead Bushclover | Lespedeza capitata |
| American Hog-peanut | Amphicarpaea bracteata var. bracteata | |
| Indian-pipe | Monotropa uniflora | |
| 10 | Spanish-needle Tick-seed | Bidens bipinnata |
| 11 | White Wood Aster | Eurybia divaricata |
| Stipuled Korean-clover | Kummerowia stipulacea | |
| White Turtlehead | Chelone glabra | |
| Large-bract Plantain | Plantago aristata | |
| Silvery False Spleenwort | Deparia acrostichoides | |
| Christmas Fern | Polystichum acrostichoides | |
| 12 | Serpentine Chickweed | Cerastium velutinum var. velutinum |
| Slender Knotweed | Polygonum tenue | |
| Lesser Snakeroot | Ageratina aromatica | |
| Square-stemmed Rose Pink | Sabatia angularis | |
| Gray Goldenrod | Solidago nemoralis var. nemoralis | |
| Yellow Indian-grass | Sorghastrum nutans | |
| Christmas Fern | Polystichum acrostichoides | |
| Little Bluestem | Schizachyrium scoparium var. scoparium | |
| Dittany | Cunila origanoides | |
| Exotic Arrow-wood | Viburnum dilatatum | |
| Dwarf Chinquapin Oak | Quercus prinoides | |
| Rough Barnyard Grass | Echinochloa muricata var. muricata | |
| Fragrant Cudweed | Pseudognaphalium obtusifolium | |
| Whorled Milkweed | Asclepias verticillata | |
| Orange-grass St. John's-wort | Hypericum gentianoides | |
| 13 | Autumn Olive | Elaeagnus umbellata |
| Fireweed | Erechtites hieraciifolius | |
| Multiflora Rose | Rosa multiflora | |
| Beechdrops | Epifagus virginiana | |
| Red Clover | Trifolium pratense | |
| 14 | Lady's Thumb Smartweed | Persicaria maculosa |
| Pennsylvania Smartweed | Persicaria pensylvanica | |
| Tall Rattlesnake-root | Nabalus altissimus | |
| Eyebane Spurge | Euphorbia nutans | |
| 15 | Canada Wood-nettle | Laportea canadensis |
| Japanese Stilt Grass | Microstegium vimineum | |
| Joint-head Arthraxon | Arthraxon hispidus | |
| Pokeweed | Phytolacca americana | |
| Smooth Grassleaf Flat-top Goldenrod | Euthamia graminifolia var. graminifolia | |
| 16 | Beefsteak Plant | Perilla frutescens |
| Black Walnut | Juglans nigra | |
| Tall Rattlesnake-root | Nabalus altissimus | |
| One-seed Bur-cucumber | Sicyos angulatus | |
| Pennsylvania Smartweed | Persicaria pensylvanica | |
| Ox-eye | Heliopsis helianthoides var. helianthoides | |
| 17 | Swamp Jack-in-the-pulpit | Arisaema triphyllum subsp. triphyllum |
| Virginia Virgin-bower | Clematis virginiana | |
| Great Blue Lobelia | Lobelia siphilitica | |
| Spotted Jewel-weed | Impatiens capensis | |
| 18 | Biennial Evening-primrose | Oenothera biennis |
| Silvery False Spleenwort | Deparia acrostichoides | |
| Small Flowered Evening-primrose | Oenothera parviflora | |
| 19 | Smooth Goldenrod | Solidago gigantea |
| One-seed Bur-cucumber | Sicyos angulatus | |
| Thin Hairy Rough-leaf Goldenrod | Solidago rugosa var. rugosa | |
| Closed-bottle Gentian | Gentiana andrewsii var. andrewsii | |
| Carolina Rose | Rosa carolina subsp. carolina | |
| Roundleaf Goldenrod | Solidago patula var. patula | |
| Smooth Heath Aster | Symphyotrichum pilosum var. pringlei | |
| 20 | Schreber's Aster | Eurybia schreberi |
| Japanese Mazus | Mazus pumilus | |
| Japanese Virgin's-bower | Clematis terniflora | |
| Thick Rough-leaf Goldenrod | Solidago rugosa var. aspera | |
| American Spikenard | Aralia racemosa | |
| Carolina Elephant-foot | Elephantopus carolinianus | |
| Short Yellowseed False Pimpernel | Lindernia dubia var. dubia | |
| Thinleaf Sunflower | Helianthus decapetalus | |
| New York Ironweed | Vernonia noveboracensis | |
| English Ivy | Hedera helix | |
| New England Aster | Symphyotrichum novae-angliae | |
| Pickerelweed | Pontederia cordata | |
| Autumn Sneezeweed | Helenium autumnale | |
| Three-lobe Tick-seed | Bidens comosa | |
| Smooth Grassleaf Flat-top Goldenrod | Euthamia graminifolia var. graminifolia | |
| Ditch Stonecrop | Penthorum sedoides | |
| Fall Phlox | Phlox paniculata | |
| Pale Jewel-weed | Impatiens pallida | |
| Yellow-flowered Leafcup | Smallanthus uvedalius | |
| 21 | Silvery False Spleenwort | Deparia acrostichoides |
| 22 | Wormseed Goosefoot | Dysphania ambrosioides |
| Purple-leaf Willowherb | Epilobium coloratum | |
| Japanese Stilt Grass | Microstegium vimineum | |
| Swamp Jack-in-the-pulpit | Arisaema triphyllum subsp. triphyllum | |
| 23 | Smooth Grassleaf Flat-top Goldenrod | Euthamia graminifolia var. graminifolia |
| Round-leaved Fame-flower | Phemeranthus teretifolius | |
| Clasping Heart-leaved Aster | Symphyotrichum undulatum | |
| Whorled Milkweed | Asclepias verticillata | |
| Wild Carrot | Daucus carota | |
| Slender Knotweed | Polygonum tenue | |
| Dock-leaf Smartweed | Persicaria lapathifolia | |
| Perfoliate Thoroughwort | Eupatorium perfoliatum | |
| Bristly Aster | Symphyotrichum puniceum var. puniceum | |
| Great Blue Lobelia | Lobelia siphilitica | |
| Whiteleaf Greenbrier | Smilax glauca | |
| Annual Wormwood | Artemisia annua | |
| Large-purple False Foxglove | Agalinis purpurea | |
| Tall Sunflower | Helianthus giganteus | |
| Dotted Smartweed | Persicaria punctata | |
| Decumbent St. Andrew's Cross | Hypericum stragulum | |
| Slender Knotweed | Polygonum tenue | |
| Striped Gentian | Gentiana villosa | |
| Philadelphia Panicgrass | Panicum philadelphicum | |
| Bristly Aster | Symphyotrichum puniceum var. puniceum | |
| White Goldenrod | Solidago bicolor | |
| Gronovius's Dodder | Cuscuta gronovii | |
| Lion's-foot Rattlesnake-root | Nabalus serpentarius | |
| White Snakeroot | Ageratina altissima var. altissima | |
| Ox-eye | Heliopsis helianthoides var. helianthoides | |
| Arrowleaf Tearthumb | Persicaria sagittata | |
| Partridge Pea | Chamaecrista fasciculata var. fasciculata | |
| Rock Sandwort | Minuartia michauxii var. michauxii | |
| Gray Goldenrod | Solidago nemoralis var. nemoralis | |
| Japanese Stilt Grass | Microstegium vimineum | |
| Starry Catchfly | Silene stellata | |
| Lesser Snakeroot | Ageratina aromatica | |
| Swamp Thistle | Cirsium muticum | |
| Kidneyleaf Mud-plantain | Heteranthera reniformis | |
| Crested Climbing Buckwheat. | Fallopia scandens | |
| Nodding Tick-seed | Bidens cernua | |
| Silvery False Spleenwort | Deparia acrostichoides | |
| False Daisy | Eclipta prostrata | |
| 25 | Groundsel Tree | Baccharis halimifolia |
| Wingstem | Verbesina alternifolia | |
| Tall Rattlesnake-root | Nabalus altissimus | |
| Indian Cucumber-root | Medeola virginiana | |
| Swamp Sunflower | Helianthus angustifolius | |
| Devil's Tick-seed | Bidens frondosa | |
| 26 | Beechdrops | Epifagus virginiana |
| Tall Sunflower | Helianthus giganteus | |
| Bristly Aster | Symphyotrichum puniceum var. puniceum | |
| White Heath Aster | Symphyotrichum ericoides var. ericoides | |
| White Snakeroot | Ageratina altissima var. altissima | |
| Nodding Trillium | Trillium cernuum | |
| Hairy Heath Aster | Symphyotrichum pilosum var. pilosum | |
| Schreber's Aster | Eurybia schreberi | |
| Delectable Sowthistle | Sonchus oleraceus | |
| Lopseed | Phryma leptostachya var. leptostachya | |
| Narrow-leaf Panicled Aster | Symphyotrichum lanceolatum var. lanceolatum | |
| 28 | Smooth Tick-seed | Bidens laevis |
| Flat-top Goldenrod | Euthamia caroliniana | |
| Groundsel Tree | Baccharis halimifolia | |
| American Pinesap | Hypopitys monotropa | |
| Downy Lobelia | Lobelia puberula var. puberula | |
| Rough Canada Goldenrod | Solidago altissima var. altissima | |
| Elliott's Gentian | Gentiana catesbaei | |
| 29 | Soapwort Gentian | Gentiana saponaria |
| Golden Tickseed | Coreopsis tinctoria var. tinctoria | |
| Pawpaw | Asimina triloba | |
| 30 | Beechdrops | Epifagus virginiana |
| Starved Aster | Symphyotrichum lateriflorum var. lateriflorum | |
| Pawpaw | Asimina triloba | |
| Annual Salt Marsh Aster | Symphyotrichum subulatum | |
| American Pinesap | Hypopitys monotropa |