Agronomy CDE Seed and Plant Identification Flashcards

Vocabulary and identification flashcards for agricultural crops, seeds, and weed species covered in the Agronomy CDE review notes.

Tobacco Seed Identification

Tiny seeds produced by tobacco plants, shown with a scale bar of $0.5\,mm$.

Soybean Seed Identification

Legume crop seed characterized by an oval shape with a prominent hilum, shown with a $1\,mm$ scale bar.

Sugarbeet Seed Identification

Crop species seed clusters characterized by rough, irregular, multi-seeded balls.

Kudzu Leaf Identification

Invasive vine leaf structure showing leaflets that can present with $2$ or $3$ distinct lobes.

Common Lambsquarter (Chenopodium album)

Weed species whose seeds are collected in autumn, sown in early spring, require germination temperatures of $70\text{--}85\,^\circ\text{F}$, germinate in $1\text{--}2$ weeks, and should be planted at a depth of $1/4\text{ inch}$.

Field Pennycress Pod Identification

Flat, heart-shaped or notched seed pods (silicles) containing multiple small seeds.

Puncturevine (Tribulus terrestris)

Trailing annual weed producing hard, sharp, spiny burs (caltrops) capable of puncturing tires and harming livestock.

Bull Thistle Identification

Thistle species characterized by distinctively hairy leaves and spiny, winged stems.

Canada Thistle Seed Identification

Perennial weed producing small achenes measuring $2.4\text{--}4.0\,mm$ in length.

Velvetleaf Seed Capsule

Distinctive cup-shaped seed capsule with circular ring carpels topped with sharp awns.

Dent Corn Seed Identification

Corn kernels characterized by a central dent or indentation on the crown formed as soft starch shrinks during drying.

Pop Corn Seed Identification

Small, hard corn kernels containing dense endosperm that explodes when heated.

Flax Seed Identification

Smooth, glossy, teardrop-shaped seeds measuring approximately $5\,mm$ long.

Shepherd's-purse Pod Identification

Triangular, purse-shaped seed pods that split open to release small golden-brown seeds.

Horseweed (Marestail) Identification

Erect annual weed with a single main stem densely covered with long, narrow, unlobed leaves.

Dodder Identification

Parasitic weed consisting of fine, leafless, yellowish-orange twining stems that wrap tightly around host plant stems.

Johnsongrass Seed Identification

Smooth, dark reddish-brown to black oval seeds produced by the perennial grass weed Johnsongrass.

Wild Oat Identification

Annual grass weed characterized by open panicles and seeds with prominent twisted, bent awns.