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Genus

Common name

Noxious Weed Seed

AOSA Examination List

Species Category

Disseminule/Planting Unit

Shape

Seed length

Seed width

Seed thickness

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Other structures

 

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From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum . From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum .
Sorghum
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum .
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum. From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum.
Sorghum almum
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum.
Sorghum almum. Spikelets with a round caryopsis on top. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum almum. Spikelets with a round caryopsis on top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum almum
Sorghum almum. Spikelets with a round caryopsis on top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum almum. Spikelets with a pedicel and rachis segment that are a mixture of fractured and intact. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum almum. Spikelets with a pedicel and rachis segment that are a mixture of fractured and intact. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum almum
Sorghum almum. Spikelets with a pedicel and rachis segment that are a mixture of fractured and intact. Photo by Julia Scher, USDA-APHIS-PPQ.

Sorghum × almum. Spikelets with a pedicel and rachis segment that are a mixture of fractured and intact. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum × almum. Spikelets with a pedicel and rachis segment that are a mixture of fractured and intact. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum almum
Sorghum × almum. Spikelets with a pedicel and rachis segment that are a mixture of fractured and intact. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum almum. Spikelets with a pedicel and rachis segment with a mixture of fractured and intact segments. Sorghum almum. Spikelets with a pedicel and rachis segment with a mixture of fractured and intact segments.
Sorghum almum
Sorghum almum. Spikelets with a pedicel and rachis segment with a mixture of fractured and intact segments.
Sorghum almum. Spikelets with a pedicel and rachis segment with a mixture of fractured and intact segments. Sorghum almum. Spikelets with a pedicel and rachis segment with a mixture of fractured and intact segments.
Sorghum almum
Sorghum almum. Spikelets with a pedicel and rachis segment with a mixture of fractured and intact segments.
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum. From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum.
Sorghum bicolor nothosubsp. drummondii
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum.

Sorghum bicolor nothosubsp. drummondii . Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum bicolor nothosubsp. drummondii. Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum bicolor nothosubsp. drummondii
Sorghum bicolor nothosubsp. drummondii. Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum bicolor nothosubsp. drummondii . Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum bicolor nothosubsp. drummondii. Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum bicolor nothosubsp. drummondii
Sorghum bicolor nothosubsp. drummondii. Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum bicolor nothosubsp. drummondii . Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum bicolor nothosubsp. drummondii. Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum bicolor nothosubsp. drummondii
Sorghum bicolor nothosubsp. drummondii. Spikelets with a less round caryopsis apex, where the slope is more gradual from the middle to the top. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum bicolor nothosubsp. drummondii . Spikelets with all pedicels and rachis segments fractured with no abscission.  Sorghum bicolor nothosubsp. drummondii. Spikelets with all pedicels and rachis segments fractured with no abscission. 
Sorghum bicolor nothosubsp. drummondii
Sorghum bicolor nothosubsp. drummondii. Spikelets with all pedicels and rachis segments fractured with no abscission. 

From Left to Right: 1–3. Sorghum drummondii 4–6. Sorghum halepense . From Left to Right: 1–3. Sorghum drummondii 4–6. Sorghum halepense.
Sorghum bicolor nothosubsp. drummondii
From Left to Right: 1–3. Sorghum drummondii 4–6. Sorghum halepense.
Sorghum bicolor subsp. bicolor . Spikelets with appressed hairs at the apex of the glumes. Sorghum bicolor subsp. bicolor. Spikelets with appressed hairs at the apex of the glumes.
Sorghum bicolor subsp. bicolor
Sorghum bicolor subsp. bicolor. Spikelets with appressed hairs at the apex of the glumes.
Sorghum bicolor subsp. bicolor . Spikelets with appressed hairs at the apex of the glumes. Sorghum bicolor subsp. bicolor. Spikelets with appressed hairs at the apex of the glumes.
Sorghum bicolor subsp. bicolor
Sorghum bicolor subsp. bicolor. Spikelets with appressed hairs at the apex of the glumes.
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ.

Sorghum halepense. Spikelets with a caryopsis with a rounded apex. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum halepense. Spikelets with a caryopsis with a rounded apex. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense
Sorghum halepense. Spikelets with a caryopsis with a rounded apex. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense. Spikelets with the separation between spikelets by a clean disarticulation at the bases, leaving no fragments. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum halepense. Spikelets with the separation between spikelets by a clean disarticulation at the bases, leaving no fragments. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense
Sorghum halepense. Spikelets with the separation between spikelets by a clean disarticulation at the bases, leaving no fragments. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense. Spikelets with the separation between spikelets by a clean disarticulation at the bases, leaving no fragments. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum halepense. Spikelets with the separation between spikelets by a clean disarticulation at the bases, leaving no fragments. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense
Sorghum halepense. Spikelets with the separation between spikelets by a clean disarticulation at the bases, leaving no fragments. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ.

Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ. Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base.
Sorghum halepense
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base.
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base.  Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. 
Sorghum halepense
Sorghum halepense. Spikelets with an intact rachis segment and pedicel and smooth spikelet base. 
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum . From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum.
Sorghum halepense
From Left to Right: 1. Sorghum × almum 2. Sorghum × drummondii 3. Sorghum halepense 4. Sorghum.

From Left to Right: 1–3. Sorghum drummondii 4–6. Sorghum halepense .   From Left to Right: 1–3. Sorghum drummondii 4–6. Sorghum halepense.  
Sorghum halepense
From Left to Right: 1–3. Sorghum drummondii 4–6. Sorghum halepense.  
Sparganium erectum. Achenes with a distorted and wrinkled surface. Sparganium erectum. Achenes with a distorted and wrinkled surface.
Sparganium erectum
Sparganium erectum. Achenes with a distorted and wrinkled surface.
Sparganium erectum. Achenes with a distorted and wrinkled surface. Sparganium erectum. Achenes with a distorted and wrinkled surface.
Sparganium erectum
Sparganium erectum. Achenes with a distorted and wrinkled surface.
Sparganium erectum. Achenes with straplike appendages from the base. Photo by Julia Scher, USDA-APHIS-PPQ. Sparganium erectum. Achenes with straplike appendages from the base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sparganium erectum
Sparganium erectum. Achenes with straplike appendages from the base. Photo by Julia Scher, USDA-APHIS-PPQ.

Sparganium erectum. Achenes with straplike appendages from the base. Photo by Julia Scher, USDA-APHIS-PPQ. Sparganium erectum. Achenes with straplike appendages from the base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sparganium erectum
Sparganium erectum. Achenes with straplike appendages from the base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sparganium eurycarpum. Achenes with straplike structures arising from the base. Photo by Julia Scher, USDA-APHIS-PPQ. Sparganium eurycarpum. Achenes with straplike structures arising from the base. Photo by Julia Scher, USDA-APHIS-PPQ.
Sparganium eurycarpum
Sparganium eurycarpum. Achenes with straplike structures arising from the base. Photo by Julia Scher, USDA-APHIS-PPQ.
Spartina pectinata . Florets with a long acuminate rachilla. Spartina pectinata. Florets with a long acuminate rachilla.
Spartina pectinata
Spartina pectinata. Florets with a long acuminate rachilla.
Spartium junceum. True seeds with a remnant of the funiculus (aril) that appears to be protruding from the hilum. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences. Spartium junceum. True seeds with a remnant of the funiculus (aril) that appears to be protruding from the hilum. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Spartium junceum
Spartium junceum. True seeds with a remnant of the funiculus (aril) that appears to be protruding from the hilum. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Spergularia rubra. True seeds with a strong groove near the margin following the curved portion of the seed margin. Spergularia rubra. True seeds with a strong groove near the margin following the curved portion of the seed margin.
Spergularia rubra
Spergularia rubra. True seeds with a strong groove near the margin following the curved portion of the seed margin.
Spermacoce alata.  True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ. Spermacoce alata. True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce alata
Spermacoce alata. True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce alata.  True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ. Spermacoce alata. True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce alata
Spermacoce alata. True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce alata.  True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ. Spermacoce alata. True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce alata
Spermacoce alata. True seeds with longitudinally oriented reticulum rows. Photo by Julia Scher, USDA-APHIS-PPQ.

Spermacoce alata.  True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ. Spermacoce alata. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce alata
Spermacoce alata. True seeds that are reticulate. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce articularis .True seeds with reticulum rows that are longitudinally oriented. Photo by Julia Scher, USDA-APHIS-PPQ. Spermacoce articularis.True seeds with reticulum rows that are longitudinally oriented. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce articularis
Spermacoce articularis.True seeds with reticulum rows that are longitudinally oriented. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce assurgens. True seeds with a hollow ventral side, with enrolled edges lined with yellow grains. Photo by Julia Scher, USDA-APHIS-PPQ. Spermacoce assurgens. True seeds with a hollow ventral side, with enrolled edges lined with yellow grains. Photo by Julia Scher, USDA-APHIS-PPQ.
Spermacoce assurgens
Spermacoce assurgens. True seeds with a hollow ventral side, with enrolled edges lined with yellow grains. Photo by Julia Scher, USDA-APHIS-PPQ.
Sphaeralcea ambigua. True seeds with a light colored area around the hilum. Sphaeralcea ambigua. True seeds with a light colored area around the hilum.
Sphaeralcea ambigua
Sphaeralcea ambigua. True seeds with a light colored area around the hilum.