Gallery

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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Glycine max. Seeds that vary in color with hilums that are yellow, imperfect black, or brown to black. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Glycine max
Glycine max. Seeds that vary in color with hilums that are yellow, imperfect black, or brown to black. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Glycyrrhiza glabra. Seed color varies from yellow to dark brown.

Glycyrrhiza glabra
Glycyrrhiza glabra. Seed color varies from yellow to dark brown.

Glycyrrhiza lepidota. The seeds are borne in a pod (fruit coat) that is covered with hooked spines. The seed has a short, slightly divergent radicle, often with a darker colored "furrow" line between the radicle and cotyledonary lobes. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Glycyrrhiza lepidota
Glycyrrhiza lepidota. The seeds are borne in a pod (fruit coat) that is covered with hooked spines. The seed has a short, slightly divergent radicle, often with a darker colored "furrow" line between the radicle and cotyledonary lobes. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Gomphrena globosa. Seeds with a fruit coat covered with woolly hairs.

Gomphrena globosa
Gomphrena globosa. Seeds with a fruit coat covered with woolly hairs.

Gomphrena globosa. Seeds with a radicle lobe that extends beyond the circular margin.

Gomphrena globosa
Gomphrena globosa. Seeds with a radicle lobe that extends beyond the circular margin.

Gomphrena haageana. Achenes enclosed in fruits with longitudinal ribs.

Gomphrena haageana
Gomphrena haageana. Achenes enclosed in fruits with longitudinal ribs.

Gossypium sp. Seeds that have been acid-delineated are smooth. Seeds just harvested are covered with voluminous amounts of fiber.

Gossypium hirsutum
Gossypium sp. Seeds that have been acid-delineated are smooth. Seeds just harvested are covered with voluminous amounts of fiber.

Grayia spinosa. Seeds with a central longitudinal rib on one side and a winged margin.

Grayia spinosa
Grayia spinosa. Seeds with a central longitudinal rib on one side and a winged margin.

Grevillea banksii. Seed with a wing that surrounds the entire margin.

Grevillea banksii
Grevillea banksii. Seed with a wing that surrounds the entire margin.

From Left to Right: 1. Grindelia squarros 2. Rhaponticum repens. Grendalia squarrosa on the left has more distinct longitudinal ridges and squared shoulders at the stylar end. Rhapontium ( Acroptilon) repens has smoother and rounded shoulders.

Grindelia squarrosa
From Left to Right: 1. Grindelia squarros 2. Rhaponticum repens. Grendalia squarrosa on the left has more distinct longitudinal ridges and squared shoulders at the stylar end. Rhapontium ( Acroptilon) repens has smoother and rounded shoulders.

Grindelia squarrosa. Achenes with a squared apical collar.

Grindelia squarrosa
Grindelia squarrosa. Achenes with a squared apical collar.

Guizotia abyssinica. Smooth achenes with many longitudinal lines.

Guizotia abyssinica
Guizotia abyssinica. Smooth achenes with many longitudinal lines.

Gutierrezia sarothrae. Achenes with a translucent and triangular pappus.

Gutierrezia sarothrae
Gutierrezia sarothrae. Achenes with a translucent and triangular pappus.

Gypsophila elegans. Seeds with small cushions on either side of the hilum.

Gypsophila elegans
Gypsophila elegans. Seeds with small cushions on either side of the hilum.

Gypsophila muralis. Black seeds with an occasional seed of a light brown color.

Gypsophila muralis
Gypsophila muralis. Black seeds with an occasional seed of a light brown color.

Gypsophila paniculata. Seeds with circumferential rows of reticulations with shiny bases. Seed capsules also pictured.

Gypsophila paniculata
Gypsophila paniculata. Seeds with circumferential rows of reticulations with shiny bases. Seed capsules also pictured.

Gypsophila paniculata. Seeds with circumferential rows of reticulations with shiny bases.

Gypsophila paniculata
Gypsophila paniculata. Seeds with circumferential rows of reticulations with shiny bases.

Halogeton glomeratus. The seed unit can be a true seed, a fruit, or the entire flower.

Halogeton glomeratus
Halogeton glomeratus. The seed unit can be a true seed, a fruit, or the entire flower.

Halogeton glomeratus. Multiple views of fruit. Fruits with and without persistent perianth. Photo by Madeline Maher, USDA-APHIS-PPQ.

Halogeton glomeratus
Halogeton glomeratus. Multiple views of fruit. Fruits with and without persistent perianth. Photo by Madeline Maher, USDA-APHIS-PPQ.

Harrisia martinii. Seeds with a large rib around the apical half of the seed margin.

Harrisia martinii
Harrisia martinii. Seeds with a large rib around the apical half of the seed margin.

Harrisia martinii. Seeds with a large collar around a depressed hilum.

Harrisia martinii
Harrisia martinii. Seeds with a large collar around a depressed hilum.

Hedeoma pulegioides. Nutlets with a large, V-shaped hilum.

Hedeoma pulegioides
Hedeoma pulegioides. Nutlets with a large, V-shaped hilum.

Hedysarum boreale ssp. boreale. Dark brown seeds with pods.

Hedysarum boreale subsp. boreale
Hedysarum boreale ssp. boreale. Dark brown seeds with pods.

Hedysarum coronarium. Light, medium, and dark brown seeds with a sharp, pointed hilum lobe.

Hedysarum coronarium
Hedysarum coronarium. Light, medium, and dark brown seeds with a sharp, pointed hilum lobe.

Hedysarum coronarium. Light, medium, and dark brown seeds.

Hedysarum coronarium
Hedysarum coronarium. Light, medium, and dark brown seeds.

Helenium autumnale. Achenes with a pappus made of triangularly papery scales.

Helenium autumnale
Helenium autumnale. Achenes with a pappus made of triangularly papery scales.

From Left to Right: 1. Helianthus annuus (cult.) 2. Helianthus annuus (wild) 3. Helianthus petiolaris

Helianthus annuus (cultivated)
From Left to Right: 1. Helianthus annuus (cult.) 2. Helianthus annuus (wild) 3. Helianthus petiolaris

Helianthus annuus (cultivated). Achenes are white to black with various degrees of striping.

Helianthus annuus (cultivated)
Helianthus annuus (cultivated). Achenes are white to black with various degrees of striping.

From Left to Right: 1. Helianthus annuus (cult.) 2. Helianthus annuus (wild) 3. Helianthus petiolaris

Helianthus annuus (wild)
From Left to Right: 1. Helianthus annuus (cult.) 2. Helianthus annuus (wild) 3. Helianthus petiolaris

Helianthus annuus (wild). Achenes with a small apical collar.

Helianthus annuus (wild)
Helianthus annuus (wild). Achenes with a small apical collar.

Helianthus ciliaris. Gray and shiny achenes with a slightly oblique and notched scar.

Helianthus ciliaris
Helianthus ciliaris. Gray and shiny achenes with a slightly oblique and notched scar.

Helianthus ciliaris. Gray and shiny achenes with occasional black blotches.

Helianthus ciliaris
Helianthus ciliaris. Gray and shiny achenes with occasional black blotches.

Helianthus maximiliani. Achenes with an apical margin that rounds inward to a small pappus crown.

Helianthus maximiliani
Helianthus maximiliani. Achenes with an apical margin that rounds inward to a small pappus crown.

From Left to Right: 1. Helianthus annuus (cultivated) 2. Helianthus annuus (wild) 3. Helianthus petiolaris. Smooth and pubescent achenes.

Helianthus petiolaris
From Left to Right: 1. Helianthus annuus (cultivated) 2. Helianthus annuus (wild) 3. Helianthus petiolaris. Smooth and pubescent achenes.

Helianthus petiolaris. Gray achenes with black mottling.

Helianthus petiolaris
Helianthus petiolaris. Gray achenes with black mottling.

Heliomeris multiflora. Black and brown mottled achenes.

Heliomeris multiflora
Heliomeris multiflora. Black and brown mottled achenes.

Heliomeris multiflora. Black and brown mottled achenes with longitudinal lines.

Heliomeris multiflora
Heliomeris multiflora. Black and brown mottled achenes with longitudinal lines.

Heliomeris multiflora. Black and brown mottled achenes with a lateral basal attachment.

Heliomeris multiflora
Heliomeris multiflora. Black and brown mottled achenes with a lateral basal attachment.

Heliopsis helianthoides. Achenes with a pappus crown that is the full width of the achene, and the basal attachment is large and centered.

Heliopsis helianthoides
Heliopsis helianthoides. Achenes with a pappus crown that is the full width of the achene, and the basal attachment is large and centered.