Welcome to our newest updating webpage: "What's in Bloom?" Below, you'll find all plants of concern that will be blooming during the month of September, with their scientific name, their common name, and the beginning and end of their blooming periods.
Northeastern Illinois
Ammophila breviligulata - American Beach Grass: Jul. 4 - Sept. 12
Helianthus giganteus - Tall Sunflower: Jul. 20 - Sept. 12
Eurybia furcata - Forked Aster: Aug. 3 - Sept. 12
Utricularia macrorhiza - Common Bladderwort: May 26 - Sept. 13
Agalinis auriculata - Eared False Foxglove: Aug. 9 - Sept. 13
Hasteola suaveolens - False Indian Plantain: Jul. 31 - Sept. 14
Rudbeckia sullivantii - Fen Black-eyed Susan: Aug. 7 - Sept. 14
Myosotis laxa - Bay Forget-Me-Not: May 31 - Sept. 15
Drosera intermedia - Narrow-Leaved Sundew: Jul. 10 - Sept. 15
Lespedeza leptostachya - Prairie Bush Clover: Jul. 20 - Sept. 15
Corallorhiza maculata - Spotted Coral Root: Jul. 21 - Sept. 15
Lechea intermedia - Savanna Pinweed: Aug. 16 - Sept. 15
Artemisia serrata - Saw-Toothed Sagebrush: Aug. 24 - Sept. 15
Agalinis gattingeri - Round-Stemmed False Foxglove: Aug. 25 - Sept. 15
Pilea fontana - Clearweed: Aug. 22 - Sept. 17
Prenanthes aspera - Rough White Lettuce: Aug. 13 - Sept. 18
Trichostema dichotomum - Blue Curls: Jul. 28 - Sept. 19
Monotropa uniflora - Indian Pipe: Jun. 21 - Sept. 20
Rhynchospora alba - White Beak Rush: Jun. 25 - Sept. 20
Agalinis skinneriana - Pale False Foxglove: Aug. 13 - Sept. 20
Liatris scariosa var. nieuwlandii - Savanna Blazing Star: Aug. 13 - Sept. 20
Gentiana alba - Yellowish Gentian: Aug. 8 - Sept. 21
Spiranthes lacera - Northern Slender Lady's Tresses: Aug. 25 - Sept. 22
Spiranthes lacera var. gracilis - Southern Slender Lady's Tresses: Aug. 25 - Sept. 22
Veronica scutellata - Marsh Speedwell: May 23 - Sept. 23
Bartonia virginica - Screw-Stem: Jul. 16 - Sept. 23
Eupatorium sessilifolium var. brittonianum - Upland Boneset: Aug. 21 - Sept. 23
Veronica catenata var. glandulosa - Water Speedwell: Jun. 10 - Sept. 24
Phemeranthus rugospermus - Prairie Fameflower: Jun. 15 - Sept. 24
Buchnera americana - American Bluehearts: Jun. 28 - Sept. 24
Zizania aquatica - Wild Rice: Jul. 20 - Sept. 24
Triglochin maritima - Common Bog Arrow Grass: May 25 - Sept. 25
Eleocharis olivacea - Wrinkle-Sheathed Spike Rush: Jun. 27 - Sept. 25
Scleria verticillata - Low Nutrush: Jul. 31 - Sept. 25
Chelone glabra - Turtlehead: Aug. 20 - Sept. 25
Woodsia obtusa - Cliff Fern: Jul. 2 - Sept. 27
Carex viridula - Green Yellow Sedge: May 4 - Sept. 28
Lycopodium clavatum - Ground Pine: Aug. 26 - Sept. 29
Cakile lacustris - Lake Rocket: Jun. 8 - Sept. 30
Callitriche palustris - Common Water Starwort: May 25 - Oct. 1
Triantha glutinosa - False Asphodel: Jun. 25 - Oct. 1
Hypericum kalmianum - Kalm St. Johnswort: Jun. 19 - Oct. 3
Hypericum swinkianum - Swink's St. Johnswort: Jun. 19 - Oct. 3
Symphyotrichum boreale - Rush Aster: Aug. 7 - Oct. 4
Spiranthes magnicamporum - Great Plains Ladies' Tresses: Aug. 31 - Oct. 5
Ceanothus americanus - New Jersey Tea: Jun. 7 - Oct. 9
Parnassia glauca - Grass of Parnassus: Aug. 12 - Oct. 9
Betula populifolia - Gray Birch: May 3 - Oct. 11
Aureolaria grandiflora var. pulchra - Yellow False Foxglove: Jul. 28 - Oct. 11
Gentiana puberulenta - Downy Gentian: Aug. 26 - Oct. 13
Lycopodium complanatum var. flabelliforme - Trailing Ground Pine: Aug. 26 - Oct. 14
Utricularia cornuta - Horned Bladderwort: Jun. 2 - Oct. 21
Eleocharis geniculata - Knee Spikerush: Jul. 30 - Oct. 26
Chamaesyce polygonifolia - Seaside Spurge: Jul. 9 - Nov. 5
Asplenium rhizophyllum - Walking Fern: May 30 - Nov. 13
Northwestern Illinois
Chelone speciosa - Midwestern Purple Turtlehead: Aug. 15 - Sept. 18
Pedicularis lanceolata - Fen Betony: Jun. 14 - Sept. 22
Prenanthes crepidinea - Nodding Rattlesnakeroot: Aug. 30 - Sept. 23
Spiranthes romanzoffiana - Hooded Lady's Tresses: Jun. 1 - Sept. 30
Polygonella articulata - Coastal Jointweed: Jul. 25 - Oct. 6
Symphyotrichum prenanthoides - Crookedstem Aster: Aug. 23 - Oct. 12
Dryopteris goldiana - Goldie's Fern: Aug. 27 - Oct. 18
Eurybia schreberi - Schreber's Aster: Jul. 27 - Oct. 26
Southern Illinois
Dichanthelium yadkinense - Panic Grass: May 1 - Sept. 30
Carex gigantea - Giant Sedge: May 1 - Sept. 30
Hydrolea uniflora - One-flowered Hydrolea: Jun. 1 - Sept. 30
Hexalectris spicata - Crested Coralroot Orchid: Jun. 1 - Sept. 30
Campanula rotundifolia - Harebell: Jun. 1 - Sept. 30
Oxalis illinoensis - Illinois Woodsorrel: Jun. 1 - Sept. 30
Bergia texana - Texas Bergia: Jun. 1 - Sept. 30
Scleria oligantha - Littlehead Nutrush: Jun. 1 - Sept. 30
Phemeranthus calycinus - Large-flowered Fameflower: Jun. 1 - Sept. 30
Scirpus polyphyllus - Leafy Bulrush: Jul. 1 - Sept. 30
Actaea rubifolia - Appalachian Bugbane: Jul. 1 - Sept. 30
Tragia cordata - Noseburn: Jul. 1 - Sept. 30
Sagittaria australis - Longbeak Arrowhead: Jul. 1 - Sept. 30
Ptilimnium costatum - Ribbed Mock Bishopweed: Jul. 1 - Sept. 30
Bartonia paniculata - Screwstem: Aug. 1 - Sept. 30
Melothria pendula - Squirting Cucumber: Jun. 1 - Oct. 01
Hylotelephium telephioides - Wild Orpine: Aug. 1 - Oct. 01
Brasenia schreberi - Watershield: May 1 - Oct. 30
Melanthera nivea - Snow Squarestem: Jun. 1 - Oct. 31
Heteranthera missouriensis - Mudplantain: Jun. 1 - Oct. 31
Dichanthelium ravenelii - Ravenel's Rosette Grass: Jun. 1 - Oct. 31
Persicaria bicornis - Long-styled Smartweed: Jul. 1 - Oct. 31
Rhynchospora glomerata - Clustered Beak Rush: Jul. 1 - Oct. 31
Helianthus angustifolius - Narrow-leaved Sunflower: Aug. 1 - Oct. 31
Gentiana saponaria - Harvestbells: Aug. 1 - Oct. 31
Iresine rhizomatosa - Juda's Bush: Aug. 1 - Oct. 31
Dicliptera brachiata - Branched Foldwing: Aug. 1 - Oct. 31
Fleischmannia incarnata - Pink Thoroughwort: Aug. 1 - Oct. 31
Eupatorium torreyanu - Torrey's Thoroughwort: Aug. 1 - Nov. 1
Eryngium prostratum - Eryngo: May 1 - Nov. 30