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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em>Sphaeralcea coccinea. True seeds that are found enclosed in carpel tissue.

Sphaeralcea coccinea
em>Sphaeralcea coccinea. True seeds that are found enclosed in carpel tissue.

Sphaeralcea grossulariifolia. True seeds with concave sides.

Sphaeralcea grossulariifolia
Sphaeralcea grossulariifolia. True seeds with concave sides.

Sphaerophysa salsula. True seeds with a radicle lobe that is somewhat shorter than the cotyledon lobe, and is divergent slightly from the cotyledonary lobe. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Sphaerophysa salsula
Sphaerophysa salsula. True seeds with a radicle lobe that is somewhat shorter than the cotyledon lobe, and is divergent slightly from the cotyledonary lobe. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Spinacia oleracea. Achenes with a dorsal fruit scar and dominant longitudinal ridges.

Spinacia oleracea
Spinacia oleracea. Achenes with a dorsal fruit scar and dominant longitudinal ridges.

Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.

Spiranthes cernua
Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.

Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.

Spiranthes cernua
Spiranthes cernua. True seeds with an oversized transparent outer tissue at the distal end.

From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4.Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus .

Sporobolus airoides
From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4.Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus .

From Left to Right: 1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus. Caryopsis with an embryo that is half the length of the caryopsis.

Sporobolus airoides
From Left to Right: 1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus. Caryopsis with an embryo that is half the length of the caryopsis.

From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus clandestinus
From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus clandestinus. Florets with a dark embryo and a laterally compressed caryopsis.

Sporobolus clandestinus
Sporobolus clandestinus. Florets with a dark embryo and a laterally compressed caryopsis.

Sporobolus compositus. Caryopsis that is laterally compressed and closely covered with fine rows of minute tubercles.

Sporobolus compositus
Sporobolus compositus. Caryopsis that is laterally compressed and closely covered with fine rows of minute tubercles.

Sporobolus compositus. Caryopsis that is laterally compressed and closely covered with fine rows of minute tubercles.

Sporobolus compositus
Sporobolus compositus. Caryopsis that is laterally compressed and closely covered with fine rows of minute tubercles.

From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus compositus
From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

From Left to Right: 1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus. Caryopsis with an embryo that is half the length of the caryopsis.

Sporobolus compositus
From Left to Right: 1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus. Caryopsis with an embryo that is half the length of the caryopsis.

Sporobolus neglectus. Caryopsis with an embryo that is half the length of the caryopsis. From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus cryptandrus
Sporobolus neglectus. Caryopsis with an embryo that is half the length of the caryopsis. From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus cryptandrus. From Left to Right: 1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus .Caryopsis with an embryo that is half the length of the caryopsis.

Sporobolus cryptandrus
Sporobolus cryptandrus. From Left to Right: 1. Sporobolus compositus 2. Sporobolus airoides 3. Sporobolus cryptandrus .Caryopsis with an embryo that is half the length of the caryopsis.

Sporobolus cryptandrus. Caryopsis that is translucent and the surface is smooth with undulations.

Sporobolus cryptandrus
Sporobolus cryptandrus. Caryopsis that is translucent and the surface is smooth with undulations.

Sporobolus neglectus. The caryopsis embryo is slightly darker. From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus giganteus
Sporobolus neglectus. The caryopsis embryo is slightly darker. From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus heterolepis. Caryopsis with remnants of the style on the distal end.

Sporobolus heterolepis
Sporobolus heterolepis. Caryopsis with remnants of the style on the distal end.

Sporobolus neglectus. Florets with an embryo with a darkly pigmented scutellum. From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Sporobolus neglectus
Sporobolus neglectus. Florets with an embryo with a darkly pigmented scutellum. From Left to Right: 1. Bottom. Sporobolus neglectus 2. Bottom. Sporobolus airoides 3. Bottom. Sporobolus clandestinus 4. Top. Sporobolus compositus 5. Top. Sporobolus giganteus 6. Top. Sporobolus cryptandrus.

Stachys palustris. Nutlets with a scar at the basal end.

Stachys palustris
Stachys palustris. Nutlets with a scar at the basal end.

Stachys palustris. Nutlets with a scar at the base that is almost obscure.

Stachys palustris
Stachys palustris. Nutlets with a scar at the base that is almost obscure.

Stellaria media. True seeds with large tubercles that are rectangular and in rows on the outer margin, but side tubercles in irregular rows with lines radiating from them.

Stellaria media
Stellaria media. True seeds with large tubercles that are rectangular and in rows on the outer margin, but side tubercles in irregular rows with lines radiating from them.

Stellaria media. True seeds with large tubercles that are rectangular and in rows on the outer margin, but side tubercles in irregular rows with lines radiating from them.

Stellaria media
Stellaria media. True seeds with large tubercles that are rectangular and in rows on the outer margin, but side tubercles in irregular rows with lines radiating from them.

Stevia rebaudiana. Achenes with a pappus crown that is slightly wider than the achene body.

Stevia rebaudiana
Stevia rebaudiana. Achenes with a pappus crown that is slightly wider than the achene body.

Strelitzia reginae. True seeds with a filamentous, yellow aril that is attached to the seed base.

Strelitzia reginae
Strelitzia reginae. True seeds with a filamentous, yellow aril that is attached to the seed base.

Striga angustifolia. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga angustifolia
Striga angustifolia. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga angustifolia. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga angustifolia
Striga angustifolia. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica. Small true seeds with detailed markings. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica
Striga asiatica. Small true seeds with detailed markings. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica. Small true seeds with detailed markings. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica
Striga asiatica. Small true seeds with detailed markings. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica. Small true seeds with many lumpy rows or are tuberculate. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica
Striga asiatica. Small true seeds with many lumpy rows or are tuberculate. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga asiatica. Small true seeds with many lumpy rows or are tuberculate.

Striga asiatica
Striga asiatica. Small true seeds with many lumpy rows or are tuberculate.

Striga aspera. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga aspera
Striga aspera. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga aspera. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga aspera
Striga aspera. True seeds with the hilum on the narrow end. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga forbesii. True seeds with ridges that are large and finely tuberculate on ridge rims. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga forbesii
Striga forbesii. True seeds with ridges that are large and finely tuberculate on ridge rims. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga forbesii. True seeds with ridges that are large and finely tuberculate on ridge rims. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga forbesii
Striga forbesii. True seeds with ridges that are large and finely tuberculate on ridge rims. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga gesnerioides. True seeds that have tuberculate ridges. Photo by Julia Scher, USDA-APHIS-PPQ.

Striga gesnerioides
Striga gesnerioides. True seeds that have tuberculate ridges. Photo by Julia Scher, USDA-APHIS-PPQ.