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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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Cucurbita pepo. Close up view of seed. Broad wrinkled groove following the margin. Photo by Norma Diaz, USDA-APHIS-PPQ. Cucurbita pepo. Close up view of seed. Broad wrinkled groove following the margin. Photo by Norma Diaz, USDA-APHIS-PPQ.
Cucurbita pepo
Cucurbita pepo. Close up view of seed. Broad wrinkled groove following the margin. Photo by Norma Diaz, USDA-APHIS-PPQ.
Cuminum cyminum. Mericarps with longitudinal ribs that are covered with short hairs. Cuminum cyminum. Mericarps with longitudinal ribs that are covered with short hairs.
Cuminum cyminum
Cuminum cyminum. Mericarps with longitudinal ribs that are covered with short hairs.
Cuminum cyminum. Lateral view of fruit. Mericarps. Photo by Ana Margina, USDA-APHIS-PPQ. Cuminum cyminum. Lateral view of fruit. Mericarps. Photo by Ana Margina, USDA-APHIS-PPQ.
Cuminum cyminum
Cuminum cyminum. Lateral view of fruit. Mericarps. Photo by Ana Margina, USDA-APHIS-PPQ.
Cuphea ignea. Seeds with a rib that widens at the hilum area near the base margin. Cuphea ignea. Seeds with a rib that widens at the hilum area near the base margin.
Cuphea ignea
Cuphea ignea. Seeds with a rib that widens at the hilum area near the base margin.

Cuscuta approximata. Granular seeds that may have two flat sides. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta approximata. Granular seeds that may have two flat sides. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta approximata
Cuscuta approximata. Granular seeds that may have two flat sides. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta approximata. Granular seeds. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta approximata. Granular seeds. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta approximata
Cuscuta approximata. Granular seeds. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta approximata. Granular light brown seeds. Cuscuta approximata. Granular light brown seeds.
Cuscuta approximata
Cuscuta approximata. Granular light brown seeds.
Cuscuta chinensis. Globose with some flat compressed surfaces. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta chinensis. Globose with some flat compressed surfaces. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta chinensis
Cuscuta chinensis. Globose with some flat compressed surfaces. Photo by Julia Scher, USDA-APHIS-PPQ.

Cuscuta chinensis. Seeds with a slight reticulation of the granules on the seed surface. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta chinensis. Seeds with a slight reticulation of the granules on the seed surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta chinensis
Cuscuta chinensis. Seeds with a slight reticulation of the granules on the seed surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epilinum. Woolly seeds that tend to adhere to each other and form multiple units. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta epilinum. Woolly seeds that tend to adhere to each other and form multiple units. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epilinum
Cuscuta epilinum. Woolly seeds that tend to adhere to each other and form multiple units. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epilinum. Seeds with a hilum that is present in slight indentations and is inconspicuous. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta epilinum. Seeds with a hilum that is present in slight indentations and is inconspicuous. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epilinum
Cuscuta epilinum. Seeds with a hilum that is present in slight indentations and is inconspicuous. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epithymum. Granular seeds with a hilum that blends in. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta epithymum. Granular seeds with a hilum that blends in. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epithymum
Cuscuta epithymum. Granular seeds with a hilum that blends in. Photo by Julia Scher, USDA-APHIS-PPQ.

Cuscuta epithymum. Granular seeds with a hint of a reticulum. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta epithymum. Granular seeds with a hint of a reticulum. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta epithymum
Cuscuta epithymum. Granular seeds with a hint of a reticulum. Photo by Julia Scher, USDA-APHIS-PPQ.
From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora . Large seeds with a sandpapery surface. From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora. Large seeds with a sandpapery surface.
Cuscuta epithymum
From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora. Large seeds with a sandpapery surface.
Cuscuta gronovii. Seeds with a conspicuous hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta gronovii. Seeds with a conspicuous hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta gronovii
Cuscuta gronovii. Seeds with a conspicuous hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta gronovii. Seeds with a conspicuous, red-colored hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta gronovii. Seeds with a conspicuous, red-colored hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta gronovii
Cuscuta gronovii. Seeds with a conspicuous, red-colored hilum. Photo by Julia Scher, USDA-APHIS-PPQ.

Cuscuta gronovii. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta gronovii. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta gronovii
Cuscuta gronovii. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta hyalina. Seeds with a pitted and corky surface. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta hyalina. Seeds with a pitted and corky surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta hyalina
Cuscuta hyalina. Seeds with a pitted and corky surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta hyalina. Small, dark brown hilum. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta hyalina. Small, dark brown hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta hyalina
Cuscuta hyalina. Small, dark brown hilum. Photo by Julia Scher, USDA-APHIS-PPQ.
From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora . Seeds with a rough surface. From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora. Seeds with a rough surface.
Cuscuta indecora
From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora. Seeds with a rough surface.

Cuscuta indecora. Seeds with a rough, sandpapery texture. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta indecora. Seeds with a rough, sandpapery texture. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta indecora
Cuscuta indecora. Seeds with a rough, sandpapery texture. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta indecora. Rough seeds with a hilum that blends in with the seed surface. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta indecora. Rough seeds with a hilum that blends in with the seed surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta indecora
Cuscuta indecora. Rough seeds with a hilum that blends in with the seed surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta indecora. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta indecora. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta indecora
Cuscuta indecora. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta japonica. Granular seeds with a hilum that is a different color from the rest of the seed. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta japonica. Granular seeds with a hilum that is a different color from the rest of the seed. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta japonica
Cuscuta japonica. Granular seeds with a hilum that is a different color from the rest of the seed. Photo by Julia Scher, USDA-APHIS-PPQ.

Cuscuta japonica. Granular seeds with a hilum that is a different color from the rest of the seed. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta japonica. Granular seeds with a hilum that is a different color from the rest of the seed. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta japonica
Cuscuta japonica. Granular seeds with a hilum that is a different color from the rest of the seed. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta japonica. Granular seeds that often have flat surfaces. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta japonica. Granular seeds that often have flat surfaces. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta japonica
Cuscuta japonica. Granular seeds that often have flat surfaces. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta obtusiflora. Granular seeds with a hilum located in a slight indentation. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta obtusiflora. Granular seeds with a hilum located in a slight indentation. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta obtusiflora
Cuscuta obtusiflora. Granular seeds with a hilum located in a slight indentation. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta obtusiflora. Granular seeds with a circular hilum that's difficult to see. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta obtusiflora. Granular seeds with a circular hilum that's difficult to see. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta obtusiflora
Cuscuta obtusiflora. Granular seeds with a circular hilum that's difficult to see. Photo by Julia Scher, USDA-APHIS-PPQ.

Cuscuta pentagona. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta pentagona. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta pentagona
Cuscuta pentagona. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta pentagona. Seeds have a rough, sandpaper texture. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta pentagona. Seeds have a rough, sandpaper texture. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta pentagona
Cuscuta pentagona. Seeds have a rough, sandpaper texture. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta pentagona. Seeds have a rough, sandpaper texture, and a hilum that blends with the surface. Photo by Julia Scher, USDA-APHIS-PPQ. Cuscuta pentagona. Seeds have a rough, sandpaper texture, and a hilum that blends with the surface. Photo by Julia Scher, USDA-APHIS-PPQ.
Cuscuta pentagona
Cuscuta pentagona. Seeds have a rough, sandpaper texture, and a hilum that blends with the surface. Photo by Julia Scher, USDA-APHIS-PPQ.
From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora . Rough, light brown seeds. From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora. Rough, light brown seeds.
Cuscuta pentagona
From Left to Right: 1. Cuscuta pentagona 2. Cuscuta epithymum 3. Cuscuta indecora. Rough, light brown seeds.

Cyamopsis tetragonoloba. Seeds are yellow to greenish-tan to black. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences. Cyamopsis tetragonoloba. Seeds are yellow to greenish-tan to black. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Cyamopsis tetragonoloba
Cyamopsis tetragonoloba. Seeds are yellow to greenish-tan to black. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Cyclamen africanum. Stippled seeds with a spatulate hilum in the center of the ventral side. Cyclamen africanum. Stippled seeds with a spatulate hilum in the center of the ventral side.
Cyclamen africanum
Cyclamen africanum. Stippled seeds with a spatulate hilum in the center of the ventral side.
Cycloloma atriplicifolium. Utricles with calyx fragments that contain hair structures.  Cycloloma atriplicifolium. Utricles with calyx fragments that contain hair structures. 
Cycloloma atriplicifolium
Cycloloma atriplicifolium. Utricles with calyx fragments that contain hair structures. 
Cymbopogon flexuosus. An awn protrudes from the distal end of the spikelet, and the rachis segment and pedicel have long hairs. Cymbopogon flexuosus. An awn protrudes from the distal end of the spikelet, and the rachis segment and pedicel have long hairs.
Cymbopogon flexuosus
Cymbopogon flexuosus. An awn protrudes from the distal end of the spikelet, and the rachis segment and pedicel have long hairs.

Cymbopogon flexuosus . Multiple views of spikelet. Photo by Ana Margina, USDA-APHIS-PPQ. Cymbopogon flexuosus. Multiple views of spikelet. Photo by Ana Margina, USDA-APHIS-PPQ.
Cymbopogon flexuosus
Cymbopogon flexuosus. Multiple views of spikelet. Photo by Ana Margina, USDA-APHIS-PPQ.
Cymbopogon refractus. The pedicel segment attached to the spikelet often bears an undeveloped spikelet.  Cymbopogon refractus. The pedicel segment attached to the spikelet often bears an undeveloped spikelet. 
Cymbopogon refractus
Cymbopogon refractus. The pedicel segment attached to the spikelet often bears an undeveloped spikelet. 
Cymbopogon refractus. The spikelets' appendages are moderately covered with long hairs. Cymbopogon refractus. The spikelets' appendages are moderately covered with long hairs.
Cymbopogon refractus
Cymbopogon refractus. The spikelets' appendages are moderately covered with long hairs.
Cynanchum laeve. Seeds with a truncated basal end are winged on the other margin. Cynanchum laeve. Seeds with a truncated basal end are winged on the other margin.
Cynanchum laeve
Cynanchum laeve. Seeds with a truncated basal end are winged on the other margin.