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Family

Genus

Common name

Noxious Weed Seed

AOSA Examination List

Species Category

Disseminule/Planting Unit

Shape

Seed length

Seed width

Seed thickness

Color

Texture

Other structures

 

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From Left to Right: 1. Salvia azurea var. grandiflora 2. Dracocephalum parviflora 3. Salvia reflexa 4. Nepeta cataria 5. Monarda punctata 6. Mentha arvensis . Seeds with a white V-shaped scar at the base. From Left to Right: 1. Salvia azurea var. grandiflora 2. Dracocephalum parviflora 3. Salvia reflexa 4. Nepeta cataria 5. Monarda punctata 6. Mentha arvensis. Seeds with a white V-shaped scar at the base.
Dracocephalum parviflorum
From Left to Right: 1. Salvia azurea var. grandiflora 2. Dracocephalum parviflora 3. Salvia reflexa 4. Nepeta cataria 5. Monarda punctata 6. Mentha arvensis. Seeds with a white V-shaped scar at the base.
Dracocephalum parviflorum. Seeds with a white, V-shaped scar at the base. Dracocephalum parviflorum. Seeds with a white, V-shaped scar at the base.
Dracocephalum parviflorum
Dracocephalum parviflorum. Seeds with a white, V-shaped scar at the base.
Dracopis amplexicaulis. Achenes with transverse ribs. Dracopis amplexicaulis. Achenes with transverse ribs.
Dracopis amplexicaulis
Dracopis amplexicaulis. Achenes with transverse ribs.
Dracopis amplexicaulis. Achenes with the pappus ring on the apical end. Dracopis amplexicaulis. Achenes with the pappus ring on the apical end.
Dracopis amplexicaulis
Dracopis amplexicaulis. Achenes with the pappus ring on the apical end.

Drymaria arenarioides. Seeds capsules. Photo by Julia Scher, USDA-APHIS-PPQ. Drymaria arenarioides. Seeds capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides
Drymaria arenarioides. Seeds capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides. Seeds have a reticulated texture. Photo by Julia Scher, USDA-APHIS-PPQ. Drymaria arenarioides. Seeds have a reticulated texture. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides
Drymaria arenarioides. Seeds have a reticulated texture. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides. Seeds are a single coil with the distal ends touching. Photo by Julia Scher, USDA-APHIS-PPQ. Drymaria arenarioides. Seeds are a single coil with the distal ends touching. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides
Drymaria arenarioides. Seeds are a single coil with the distal ends touching. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides. Coiled seeds. Photo by Julia Scher, USDA-APHIS-PPQ. Drymaria arenarioides. Coiled seeds. Photo by Julia Scher, USDA-APHIS-PPQ.
Drymaria arenarioides
Drymaria arenarioides. Coiled seeds. Photo by Julia Scher, USDA-APHIS-PPQ.

Dysphania ambrosioides. Seeds with opaque bracts and a transparent fruit coat. Dysphania ambrosioides. Seeds with opaque bracts and a transparent fruit coat.
Dysphania ambrosioides
Dysphania ambrosioides. Seeds with opaque bracts and a transparent fruit coat.
Echinacea angustifolia var. angustifolia. Achenes that have a white basal half with a black or brown top and irregular pappus rings. Echinacea angustifolia var. angustifolia. Achenes that have a white basal half with a black or brown top and irregular pappus rings.
Echinacea angustifolia var. angustifolia
Echinacea angustifolia var. angustifolia. Achenes that have a white basal half with a black or brown top and irregular pappus rings.
Echinacea angustifolia var. angustifolia. Achenes that have a white basal half with a black or brown top. Echinacea angustifolia var. angustifolia. Achenes that have a white basal half with a black or brown top.
Echinacea angustifolia var. angustifolia
Echinacea angustifolia var. angustifolia. Achenes that have a white basal half with a black or brown top.
Echinacea paradoxa. Achenes with a white or brown base and a black or brown top. Echinacea paradoxa. Achenes with a white or brown base and a black or brown top.
Echinacea paradoxa
Echinacea paradoxa. Achenes with a white or brown base and a black or brown top.

Echinacea purpurea. Achenes with a pappus ring made of several spikes. Echinacea purpurea. Achenes with a pappus ring made of several spikes.
Echinacea purpurea
Echinacea purpurea. Achenes with a pappus ring made of several spikes.
Echinocereus sp. Seeds with a large hilum that make the straight side of the D shape. Echinocereus sp. Seeds with a large hilum that make the straight side of the D shape.
Echinocereus sp.
Echinocereus sp. Seeds with a large hilum that make the straight side of the D shape.
Echinochloa colona. Spikelets with shiny and smooth lemma and palea with few hispid hairs on the glumes.  Echinochloa colona. Spikelets with shiny and smooth lemma and palea with few hispid hairs on the glumes. 
Echinochloa colona
Echinochloa colona. Spikelets with shiny and smooth lemma and palea with few hispid hairs on the glumes. 
Echinochloa colona. Multiple views of spikelet. Spikelets in various views, some with purple coloring. Photo courtesy of USDA-APHIS-PPQ. Echinochloa colona. Multiple views of spikelet. Spikelets in various views, some with purple coloring. Photo courtesy of USDA-APHIS-PPQ.
Echinochloa colona
Echinochloa colona. Multiple views of spikelet. Spikelets in various views, some with purple coloring. Photo courtesy of USDA-APHIS-PPQ.

Echinochloa crus-galli . Glumes that have strong hispid on the veins. Florets are very smooth and shiny. Echinochloa crus-galli. Glumes that have strong hispid on the veins. Florets are very smooth and shiny.
Echinochloa crus-galli
Echinochloa crus-galli. Glumes that have strong hispid on the veins. Florets are very smooth and shiny.
Echinochloa crus-galli. Lateral view of spikelet with an awned sterile lemma. The upper glume is easily broken off of this disseminule and therefore may be missing from the disseminule. Photo courtesy of USDA-APHIS-PPQ. Echinochloa crus-galli. Lateral view of spikelet with an awned sterile lemma. The upper glume is easily broken off of this disseminule and therefore may be missing from the disseminule. Photo courtesy of USDA-APHIS-PPQ.
Echinochloa crus-galli
Echinochloa crus-galli. Lateral view of spikelet with an awned sterile lemma. The upper glume is easily broken off of this disseminule and therefore may be missing from the disseminule. Photo courtesy of USDA-APHIS-PPQ.
Echinochloa frumentacea. Brown glumes and yellow to gray florets with yellow lines.  Echinochloa frumentacea. Brown glumes and yellow to gray florets with yellow lines. 
Echinochloa frumentacea
Echinochloa frumentacea. Brown glumes and yellow to gray florets with yellow lines. 
Echinocystis lobata. Seeds with sunken areas that are moderately rough.  Echinocystis lobata. Seeds with sunken areas that are moderately rough. 
Echinocystis lobata
Echinocystis lobata. Seeds with sunken areas that are moderately rough. 

Echium vulgare. Nutlets with a warty surface with a few dorsal ribs.  Echium vulgare. Nutlets with a warty surface with a few dorsal ribs. 
Echium vulgare
Echium vulgare. Nutlets with a warty surface with a few dorsal ribs. 
Eclipta prostrata. Achenes that are covered with large, rounded, and irregular tubercles. Eclipta prostrata. Achenes that are covered with large, rounded, and irregular tubercles.
Eclipta prostrata
Eclipta prostrata. Achenes that are covered with large, rounded, and irregular tubercles.
Eichhornia azurea. Seeds with large longitudinal ribs. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia azurea. Seeds with large longitudinal ribs. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea
Eichhornia azurea. Seeds with large longitudinal ribs. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea. Seeds are covered with flaky and transparent tissue. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia azurea. Seeds are covered with flaky and transparent tissue. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea
Eichhornia azurea. Seeds are covered with flaky and transparent tissue. Photo by Julia Scher, USDA-APHIS-PPQ.

Eichhornia azurea. Seeds with large longitudinal ribs. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia azurea. Seeds with large longitudinal ribs. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea
Eichhornia azurea. Seeds with large longitudinal ribs. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea. Seeds are covered with flaky and transparent tissue. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia azurea. Seeds are covered with flaky and transparent tissue. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea
Eichhornia azurea. Seeds are covered with flaky and transparent tissue. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea. Seeds with a pointed basal end. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia azurea. Seeds with a pointed basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia azurea
Eichhornia azurea. Seeds with a pointed basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia crassipes. Seeds with thin and scurfy ribs and a pointed basal end. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia crassipes. Seeds with thin and scurfy ribs and a pointed basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia crassipes
Eichhornia crassipes. Seeds with thin and scurfy ribs and a pointed basal end. Photo by Julia Scher, USDA-APHIS-PPQ.

Eichhornia crassipes. Seeds with thin and scurfy ribs. Photo by Julia Scher, USDA-APHIS-PPQ. Eichhornia crassipes. Seeds with thin and scurfy ribs. Photo by Julia Scher, USDA-APHIS-PPQ.
Eichhornia crassipes
Eichhornia crassipes. Seeds with thin and scurfy ribs. Photo by Julia Scher, USDA-APHIS-PPQ.
Eleocharis macrostachya. Achenes are various shades of brown with a conic tubercle. Eleocharis macrostachya. Achenes are various shades of brown with a conic tubercle.
Eleocharis macrostachya
Eleocharis macrostachya. Achenes are various shades of brown with a conic tubercle.
Eleocharis palustris. Achenes with a conic tubercle. Eleocharis palustris. Achenes with a conic tubercle.
Eleocharis palustris
Eleocharis palustris. Achenes with a conic tubercle.
Eleocharis palustris. Achenes with barbed bristles from the base. Eleocharis palustris. Achenes with barbed bristles from the base.
Eleocharis palustris
Eleocharis palustris. Achenes with barbed bristles from the base.

Elephantopus mollis. Achenes with ribs covered with small, appressed hairs.  Elephantopus mollis. Achenes with ribs covered with small, appressed hairs. 
Elephantopus mollis
Elephantopus mollis. Achenes with ribs covered with small, appressed hairs. 
Eleusine indica. Seeds are covered with a thin, loose pericarp. A seed with the pericarp attached is called a caryopsis.  Eleusine indica. Seeds are covered with a thin, loose pericarp. A seed with the pericarp attached is called a caryopsis. 
Eleusine indica
Eleusine indica. Seeds are covered with a thin, loose pericarp. A seed with the pericarp attached is called a caryopsis. 
Eleusine indica . Multiple views of seed. Seed in dorsal (left) and ventral (right) views. Photo courtesy of USDA-APHIS-PPQ. Eleusine indica. Multiple views of seed. Seed in dorsal (left) and ventral (right) views. Photo courtesy of USDA-APHIS-PPQ.
Eleusine indica
Eleusine indica. Multiple views of seed. Seed in dorsal (left) and ventral (right) views. Photo courtesy of USDA-APHIS-PPQ.
Ellisia nyctelea. Seeds with strong reticulations with unilateral spaces.  Ellisia nyctelea. Seeds with strong reticulations with unilateral spaces. 
Ellisia nyctelea
Ellisia nyctelea. Seeds with strong reticulations with unilateral spaces. 

Elymus canadensis. Florets with a rachilla that tapers down to the wide callus. The awns are divergently curved when dry and are two to three cm long.  Elymus canadensis. Florets with a rachilla that tapers down to the wide callus. The awns are divergently curved when dry and are two to three cm long. 
Elymus canadensis
Elymus canadensis. Florets with a rachilla that tapers down to the wide callus. The awns are divergently curved when dry and are two to three cm long. 
Elymus elymoides. Florets with a V-shaped sinus. Elymus elymoides. Florets with a V-shaped sinus.
Elymus elymoides
Elymus elymoides. Florets with a V-shaped sinus.
Elymus glaucus. Florets with long, lanceolate glumes with two to five scabrous nerves, and a long rachilla.  Elymus glaucus. Florets with long, lanceolate glumes with two to five scabrous nerves, and a long rachilla. 
Elymus glaucus
Elymus glaucus. Florets with long, lanceolate glumes with two to five scabrous nerves, and a long rachilla. 
Elymus gmelinii.  Florets with a long, curved lemma awn. Elymus gmelinii. Florets with a long, curved lemma awn.
Elymus gmelinii
Elymus gmelinii. Florets with a long, curved lemma awn.