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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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Gaillardia pulchella. Achenes with a broad apical rim that supports four to six pappus units composed of broad scales that terminate in a single bristle. Gaillardia pulchella. Achenes with a broad apical rim that supports four to six pappus units composed of broad scales that terminate in a single bristle.
Gaillardia pulchella
Gaillardia pulchella. Achenes with a broad apical rim that supports four to six pappus units composed of broad scales that terminate in a single bristle.
Gaillardia pulchella. Achenes with pappus units that are broad scales at the base, but terminate in a narrow bristle.  Gaillardia pulchella. Achenes with pappus units that are broad scales at the base, but terminate in a narrow bristle. 
Gaillardia pulchella
Gaillardia pulchella. Achenes with pappus units that are broad scales at the base, but terminate in a narrow bristle. 
Galearis spectabilis. Seeds are centered in a long transparent sac. Galearis spectabilis. Seeds are centered in a long transparent sac.
Galearis spectabilis
Galearis spectabilis. Seeds are centered in a long transparent sac.
Galega officinalis. Seed pods. Photo by Julia Scher, USDA-APHIS-PPQ. Galega officinalis. Seed pods. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis
Galega officinalis. Seed pods. Photo by Julia Scher, USDA-APHIS-PPQ.

Galega officinalis . Small circular hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Galega officinalis. Small circular hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis
Galega officinalis. Small circular hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis . There is a marginal hump on the cotyledon margin above the hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Galega officinalis. There is a marginal hump on the cotyledon margin above the hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis
Galega officinalis. There is a marginal hump on the cotyledon margin above the hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis. Seed pods. Photo by Julia Scher, USDA-APHIS-PPQ. Galega officinalis. Seed pods. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis
Galega officinalis. Seed pods. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis . There is a strong crease between the radicle and cotyledon lobes. Photo by Julia Scher, USDA-APHIS-PPQ. Galega officinalis. There is a strong crease between the radicle and cotyledon lobes. Photo by Julia Scher, USDA-APHIS-PPQ.
Galega officinalis
Galega officinalis. There is a strong crease between the radicle and cotyledon lobes. Photo by Julia Scher, USDA-APHIS-PPQ.

Galeopsis tetrahit. Nutlets that are brown with many light brown raised areas.  Galeopsis tetrahit. Nutlets that are brown with many light brown raised areas. 
Galeopsis tetrahit
Galeopsis tetrahit. Nutlets that are brown with many light brown raised areas. 
Galinsoga parviflora. Achenes with feathery pappus units with minute hairs along their margins. Galinsoga parviflora. Achenes with feathery pappus units with minute hairs along their margins.
Galinsoga parviflora
Galinsoga parviflora. Achenes with feathery pappus units with minute hairs along their margins.
Galinsoga quadriradiata. Achenes with white, bristly pappus units at the terminal ends. Galinsoga quadriradiata. Achenes with white, bristly pappus units at the terminal ends.
Galinsoga quadriradiata
Galinsoga quadriradiata. Achenes with white, bristly pappus units at the terminal ends.
Galium aparine. Achenes with a large, circular hole at the scar location.  Galium aparine. Achenes with a large, circular hole at the scar location. 
Galium aparine
Galium aparine. Achenes with a large, circular hole at the scar location. 

Galium aparine. Achenes are smooth and glabrous when separated from the pericarp outer coat.  Galium aparine. Achenes are smooth and glabrous when separated from the pericarp outer coat. 
Galium aparine
Galium aparine. Achenes are smooth and glabrous when separated from the pericarp outer coat. 
Galium aparine. Achenes are smooth and glabrous when separated from the pericarp outer coat.  Galium aparine. Achenes are smooth and glabrous when separated from the pericarp outer coat. 
Galium aparine
Galium aparine. Achenes are smooth and glabrous when separated from the pericarp outer coat. 
Galium aparine . Achenes that have not been separated from the pericarp outer coat. Photo courtesy of USDA-APHIS-PPQ. Galium aparine. Achenes that have not been separated from the pericarp outer coat. Photo courtesy of USDA-APHIS-PPQ.
Galium aparine
Galium aparine. Achenes that have not been separated from the pericarp outer coat. Photo courtesy of USDA-APHIS-PPQ.
Galium tricornutum. Achenes with a bicolor appearance with the yellow tubercles on a dark background.  Galium tricornutum. Achenes with a bicolor appearance with the yellow tubercles on a dark background. 
Galium tricornutum
Galium tricornutum. Achenes with a bicolor appearance with the yellow tubercles on a dark background. 

Gazania rigens. Achenes with margins that recurve near the pappus crown.  Gazania rigens. Achenes with margins that recurve near the pappus crown. 
Gazania rigens
Gazania rigens. Achenes with margins that recurve near the pappus crown. 
Gazania sp. Achenes with pods. Gazania sp. Achenes with pods.
Gazania sp.
Gazania sp. Achenes with pods.
Genista monspessulana. Seeds with a caruncle-like aril over the hilum that is light yellow to white. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences. Genista monspessulana. Seeds with a caruncle-like aril over the hilum that is light yellow to white. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Genista monspessulana
Genista monspessulana. Seeds with a caruncle-like aril over the hilum that is light yellow to white. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Geranium caespitosum. Seeds with bases of reticulations that are minutely stippled.  Geranium caespitosum. Seeds with bases of reticulations that are minutely stippled. 
Geranium caespitosum
Geranium caespitosum. Seeds with bases of reticulations that are minutely stippled. 

Geranium carolinianum. Seeds with a strong reticulum with mostly rectangular interspaces.  Geranium carolinianum. Seeds with a strong reticulum with mostly rectangular interspaces. 
Geranium carolinianum
Geranium carolinianum. Seeds with a strong reticulum with mostly rectangular interspaces. 
Geranium dissectum. Seeds are borne singly in a fruit that is very hairy and is attached to a circular style.  Geranium dissectum. Seeds are borne singly in a fruit that is very hairy and is attached to a circular style. 
Geranium dissectum
Geranium dissectum. Seeds are borne singly in a fruit that is very hairy and is attached to a circular style. 
Geranium dissectum. Seeds (true seeds) with pericarp removed. Photo by Keith E. Clancy, USDA-APHIS-PPQ. Geranium dissectum. Seeds (true seeds) with pericarp removed. Photo by Keith E. Clancy, USDA-APHIS-PPQ.
Geranium dissectum
Geranium dissectum. Seeds (true seeds) with pericarp removed. Photo by Keith E. Clancy, USDA-APHIS-PPQ.
Geranium viscosissimum. The seed's surface is sometimes covered with scurfy materials.  Geranium viscosissimum. The seed's surface is sometimes covered with scurfy materials. 
Geranium viscosissimum
Geranium viscosissimum. The seed's surface is sometimes covered with scurfy materials. 

Gerbera jamesonii. Achenes with a disc-like pappus crown on the elongated end. Gerbera jamesonii. Achenes with a disc-like pappus crown on the elongated end.
Gerbera jamesonii
Gerbera jamesonii. Achenes with a disc-like pappus crown on the elongated end.
Geum   laciniatum. Achenes with some moderately long hairs on the surface, especially at the base of the styles.  Geum laciniatum. Achenes with some moderately long hairs on the surface, especially at the base of the styles. 
Geum laciniatum
Geum laciniatum. Achenes with some moderately long hairs on the surface, especially at the base of the styles. 
Geum rivale. Achenes with long styles that have hooked ends. Geum rivale. Achenes with long styles that have hooked ends.
Geum rivale
Geum rivale. Achenes with long styles that have hooked ends.
Gilia capitata. Seeds with a white ridge at the base. Gilia capitata. Seeds with a white ridge at the base.
Gilia capitata
Gilia capitata. Seeds with a white ridge at the base.

Gilia capitata. Seeds with a white ridge at the base. Gilia capitata. Seeds with a white ridge at the base.
Gilia capitata
Gilia capitata. Seeds with a white ridge at the base.
Gilia tricolor. Irregularly-shaped rough seeds. Gilia tricolor. Irregularly-shaped rough seeds.
Gilia tricolor
Gilia tricolor. Irregularly-shaped rough seeds.
Ginkgo biloba. Smooth dark brown seeds that may have a triangular cross-section. Ginkgo biloba. Smooth dark brown seeds that may have a triangular cross-section.
Ginkgo biloba
Ginkgo biloba. Smooth dark brown seeds that may have a triangular cross-section.
Gladiolus sp. Seeds with a translucent outer seed coat. Gladiolus sp. Seeds with a translucent outer seed coat.
Gladiolus sp.
Gladiolus sp. Seeds with a translucent outer seed coat.

Glaucium corniculatum. Brown to gray seeds with a deep reticulum that forms square interspaces.  Glaucium corniculatum. Brown to gray seeds with a deep reticulum that forms square interspaces. 
Glaucium corniculatum
Glaucium corniculatum. Brown to gray seeds with a deep reticulum that forms square interspaces. 
Glebionis carinatum. Achenes with sharp margins and the opposite margins are concave and convex. Glebionis carinatum. Achenes with sharp margins and the opposite margins are concave and convex.
Glebionis carinatum
Glebionis carinatum. Achenes with sharp margins and the opposite margins are concave and convex.
Glebionis coronarium. Achenes with longitudinal ribs with granulation between them.  Glebionis coronarium. Achenes with longitudinal ribs with granulation between them. 
Glebionis coronarium
Glebionis coronarium. Achenes with longitudinal ribs with granulation between them. 
Glechoma hederacea. Nutlets are rough with some scurfy material attached.  Glechoma hederacea. Nutlets are rough with some scurfy material attached. 
Glechoma hederacea
Glechoma hederacea. Nutlets are rough with some scurfy material attached. 

Gleditsia triacanthos. Seeds vary in size and my have  transverse stress cracks. Gleditsia triacanthos. Seeds vary in size and my have  transverse stress cracks.
Gleditsia triacanthos
Gleditsia triacanthos. Seeds vary in size and my have  transverse stress cracks.
Glyceria fluitans. Florets with a granular lemma and a smooth palea, the caryopsis is very dark and rounded. Glyceria fluitans. Florets with a granular lemma and a smooth palea, the caryopsis is very dark and rounded.
Glyceria fluitans
Glyceria fluitans. Florets with a granular lemma and a smooth palea, the caryopsis is very dark and rounded.
Glyceria grandis. Florets with a dark and obovoid caryopsis and a slightly convex palea. Glyceria grandis. Florets with a dark and obovoid caryopsis and a slightly convex palea.
Glyceria grandis
Glyceria grandis. Florets with a dark and obovoid caryopsis and a slightly convex palea.
Glyceria striata. Florets with a smooth caryopsis and the lemma is constricted near the base. Glyceria striata. Florets with a smooth caryopsis and the lemma is constricted near the base.
Glyceria striata
Glyceria striata. Florets with a smooth caryopsis and the lemma is constricted near the base.