Yellow Nutsedge

Cyperus esculentus

Perennial with a triangular stem

Part of the Cyperaceae or Sedge Family

Barnyardgrass

Echinochloa crus-galli

No ligule or auricle: "naked grass"

Yellow Foxtail

Setaria pumila

Non-round stem with hairy ligule

Know seed shape- larger than green foxtail.

Green Foxtail

Setaria viridis

Round stem and non-hairy ligule

 Know seed shape and size- smaller than yellow

Witchgrass

Panicum capillare

Very hairy all over. Heads are more compact than Fall Panicum. Look like witch broom. 

Fall Panicum

Panicum dichotomiflorum

More branched and spaced out heads.

Hairy/fringed ligule. 

Velvetleaf

Abutilon theophrasti

Soft, velvety, heart shaped leaves.

Mitten (heart-ish) shaped seeds that are similar to but larger than venice mallow seeds.

Wild Buckwheat

Polygonum convolvulus

Spade shaped, pointy leaves. 

Base of leaves point inward. Presence of ochrea makes it different from field bindweed.

Field Bindweed

Convolvulus arvensis

Does not have an ochrea. Cute little white flowers. Small football shaped seeds. 

Redroot Pigweed

Amaranthus retroflexus

Thick stem. Prominant seed head. 

Common Purslane

Portulaca oleraceae

Very moist and water-holding. Milky sap.

Very waxy leaves.

Common Lambsquarter

Cheonopodium album

Serated leaves. 

Leafy Spurge

Euphorbia esula

Noxious weed in SD. 

Canada Thistle

Cirsium arvense

Very serrated leaves. Purple blossom. 

Noxious in SD

Perennial Sow Thistle

Sonchus arvensis

Taller than dandelion. Noxious in SD.

Hoary Cress

Cardaria draba

Noxious in SD. Scroll down. 

Russian Knapweed

Centaurea repens

Cute purple heads. Noxious in SD.

Purple Loosestrife

Lythrum salicaria

Noxious in SD. SO PRETTY!!!