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Photo of tall thoroughwort plant with flowers

Common Boneset (Thoroughwort)

Eupatorium perfoliatum

Photo of common water hemlock or spotted cowbane flowers

Common Water Hemlock

Cicuta maculata

Poisonous

Photo of corn salad plant flower clusters showing arrangement of buds.

Corn Salad

Valerianella radiata

Edible

Rope dodder stems

Dodders

Cuscuta spp.

Photo of horseweed flowers

Horseweed (Canada Fleabane, Hog Weed)

Conyza canadensis (formerly Erigeron canadensis)

Photo of Indian hemp plant

Indian Hemp (Dogbane)

Apocynum cannabinum

Poisonous

Photo of a large-flowered gaura inflorescence

Large-Flowered Gaura

Oenothera filiformis (formerly Gaura longiflora, G. biennis)

Photo of whorled milkweed flowers.

Milkweeds

Subfamily Asclepiadoideae

Photo of northern fog fruit flowering head

Northern Fog Fruit

Lippia lanceolata (formerly Phyla lanceolata)

Photo of pale Indian plantain flower clusters.

Pale Indian Plantain

Arnoglossum atriplicifolium (also Cacalia atriplicifolia)

Photo of slender mountain mint flowers

Slender Mountain Mint

Pycnanthemum tenuifolium

Edible

Star of Bethlehem cluster of plants with flowers

Star of Bethlehem

Ornithogalum umbellatum

Poisonous

Photo of swamp milkweed, three plants with flower clusters.

Swamp Milkweed

Asclepias incarnata

Photo of tall thistle plants with flowers

Tall Thistle

Cirsium altissimum

Edible

Photo of a tall thoroughwort plant in bloom.

Tall Thoroughwort (Tall Boneset)

Eupatorium altissimum

Photo of tick trefoil plant with flowers

Tick Trefoils (Sticktights; Beggar's Lice)

Desmodium spp. (17 species in Missouri)

Photo of white crownbeard plant with flowers

White Crownbeard

Verbesina virginica

Photo of white heath aster flowers

White Heath Aster

Symphyotrichum pilosum (formerly Aster pilosus)

Photo of white snakeroot leaves and flowers

White Snakeroot

Ageratina altissima (formerly Eupatorium rugosum)

Poisonous