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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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Orobanche minor. Dark brown true seeds. Photo by Julia Scher, USDA-APHIS-PPQ. Orobanche minor. Dark brown true seeds. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche minor
Orobanche minor. Dark brown true seeds. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche minor. Seed capsule. Photo by Julia Scher, USDA-APHIS-PPQ. Orobanche minor. Seed capsule. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche minor
Orobanche minor. Seed capsule. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche minor. True seeds with reticulations that have shiny walls and stippled bases. Photo by Julia Scher, USDA-APHIS-PPQ. Orobanche minor. True seeds with reticulations that have shiny walls and stippled bases. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche minor
Orobanche minor. True seeds with reticulations that have shiny walls and stippled bases. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche ramosa. Seeds with deep reticulations with irregular interspaces. Photo by Julia Scher, USDA-APHIS-PPQ. Orobanche ramosa. Seeds with deep reticulations with irregular interspaces. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche ramosa
Orobanche ramosa. Seeds with deep reticulations with irregular interspaces. Photo by Julia Scher, USDA-APHIS-PPQ.

Orobanche ramosa. The seeds are somewhat irregular in shape, and this is also the case for the reticulations. Photo by Julia Scher, USDA-APHIS-PPQ. Orobanche ramosa. The seeds are somewhat irregular in shape, and this is also the case for the reticulations. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche ramosa
Orobanche ramosa. The seeds are somewhat irregular in shape, and this is also the case for the reticulations. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche ramosa. Seeds with deep reticulations. Orobanche ramosa. Seeds with deep reticulations.
Orobanche ramosa
Orobanche ramosa. Seeds with deep reticulations.
Orobanche ramosa.  Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ. Orobanche ramosa. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Orobanche ramosa
Orobanche ramosa. Seed capsules. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza longistaminata. Glumes are short and appressed to the base. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza longistaminata. Glumes are short and appressed to the base. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza longistaminata
Oryza longistaminata. Glumes are short and appressed to the base. Photo by Julia Scher, USDA-APHIS-PPQ.

Oryza longistaminata. The caryopsis has a red pericarp. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza longistaminata. The caryopsis has a red pericarp. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza longistaminata
Oryza longistaminata. The caryopsis has a red pericarp. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza punctata. White spikelets with caryopses that have a brown pericarp. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza punctata. White spikelets with caryopses that have a brown pericarp. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza punctata
Oryza punctata. White spikelets with caryopses that have a brown pericarp. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza punctata . Brown caryopses. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza punctata. Brown caryopses. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza punctata
Oryza punctata. Brown caryopses. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon
Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ.

Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon
Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon. Caryopsis with dark red pericarp. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza rufipogon. Caryopsis with dark red pericarp. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon
Oryza rufipogon. Caryopsis with dark red pericarp. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon . Laterally striate spikelets. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza rufipogon. Laterally striate spikelets. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon
Oryza rufipogon. Laterally striate spikelets. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon. Caryopsis with dark red pericarp.  Oryza rufipogon. Caryopsis with dark red pericarp. 
Oryza rufipogon
Oryza rufipogon. Caryopsis with dark red pericarp. 

Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon
Oryza rufipogon. Spikelets with scattered appressed hairs. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon. Texture is laterally striate. Photo by Julia Scher, USDA-APHIS-PPQ. Oryza rufipogon. Texture is laterally striate. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza rufipogon
Oryza rufipogon. Texture is laterally striate. Photo by Julia Scher, USDA-APHIS-PPQ.
Oryza sativa. White caryopsis with a laterally compressed floret, scattered fine and appressed hairs. Oryza sativa. White caryopsis with a laterally compressed floret, scattered fine and appressed hairs.
Oryza sativa
Oryza sativa. White caryopsis with a laterally compressed floret, scattered fine and appressed hairs.
Ottelia alismoides. Dense woolly hair mostly at the apex. Photo by Julia Scher, USDA-APHIS-PPQ. Ottelia alismoides. Dense woolly hair mostly at the apex. Photo by Julia Scher, USDA-APHIS-PPQ.
Ottelia alismoides
Ottelia alismoides. Dense woolly hair mostly at the apex. Photo by Julia Scher, USDA-APHIS-PPQ.

Ottelia alismoides. True seeds with a pointed hilum at the basal end. Photo by Julia Scher, USDA-APHIS-PPQ. Ottelia alismoides. True seeds with a pointed hilum at the basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Ottelia alismoides
Ottelia alismoides. True seeds with a pointed hilum at the basal end. Photo by Julia Scher, USDA-APHIS-PPQ.
Ottelia alismoides. True seeds covered with woolly hair. Photo by Julia Scher, USDA-APHIS-PPQ. Ottelia alismoides. True seeds covered with woolly hair. Photo by Julia Scher, USDA-APHIS-PPQ.
Ottelia alismoides
Ottelia alismoides. True seeds covered with woolly hair. Photo by Julia Scher, USDA-APHIS-PPQ.
Oxalis stricta. True seeds with very strong transverse ridges. Oxalis stricta. True seeds with very strong transverse ridges.
Oxalis stricta
Oxalis stricta. True seeds with very strong transverse ridges.
Oxyspora paniculata. Seeds are irregular shreds, making the shape difficult to describe.  Oxyspora paniculata. Seeds are irregular shreds, making the shape difficult to describe. 
Oxyspora paniculata
Oxyspora paniculata. Seeds are irregular shreds, making the shape difficult to describe. 

Oxyspora paniculata. Granular seeds with the hilum at the ends. Oxyspora paniculata. Granular seeds with the hilum at the ends.
Oxyspora paniculata
Oxyspora paniculata. Granular seeds with the hilum at the ends.
Oxytropis lambertii.  The seed shape is variable from oval to Oxytropis lambertii. The seed shape is variable from oval to "human" heart-shaped to mitten-shaped. 
Oxytropis lambertii
Oxytropis lambertii. The seed shape is variable from oval to "human" heart-shaped to mitten-shaped. 
Oxytropis lambertii. The top of the cotyledonary and radicle lobe is often lighter colored. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences. Oxytropis lambertii. The top of the cotyledonary and radicle lobe is often lighter colored. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Oxytropis lambertii
Oxytropis lambertii. The top of the cotyledonary and radicle lobe is often lighter colored. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Oxytropis sericea var. speciosa. True seeds with a light-colored hilar notch. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences. Oxytropis sericea var. speciosa. True seeds with a light-colored hilar notch. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.
Oxytropis sericea var. speciosa
Oxytropis sericea var. speciosa. True seeds with a light-colored hilar notch. Photo courtesy of Colorado State University, Department of Soil and Crop Sciences.

Panax quinquefolius. True seeds with a straight margin that have a central groove.  Panax quinquefolius. True seeds with a straight margin that have a central groove. 
Panax quinquefolius
Panax quinquefolius. True seeds with a straight margin that have a central groove. 
Panax quinquefolius. True seeds with a very rough texture. Panax quinquefolius. True seeds with a very rough texture.
Panax quinquefolius
Panax quinquefolius. True seeds with a very rough texture.
Panicum capillare . When present, spikelets are composed of a papery first and second glume, a papery sterile lemma, and a floret.  Panicum capillare. When present, spikelets are composed of a papery first and second glume, a papery sterile lemma, and a floret. 
Panicum capillare
Panicum capillare. When present, spikelets are composed of a papery first and second glume, a papery sterile lemma, and a floret. 
From Left to Right: 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum . The second glume and sterile lemma are pointed. From Left to Right: 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum. The second glume and sterile lemma are pointed.
Panicum capillare
From Left to Right: 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum. The second glume and sterile lemma are pointed.

Panicum coloratum . Olive-brown florets with yellow nerves, a wide yellow spot on the lemma center. Panicum coloratum. Olive-brown florets with yellow nerves, a wide yellow spot on the lemma center.
Panicum coloratum
Panicum coloratum. Olive-brown florets with yellow nerves, a wide yellow spot on the lemma center.
Panicum coloratum . Spikelets can be found and are composed of a small first glume, a second glume, and a sterile lemma of equal length (and pointed), and finally the floret.  Panicum coloratum. Spikelets can be found and are composed of a small first glume, a second glume, and a sterile lemma of equal length (and pointed), and finally the floret. 
Panicum coloratum
Panicum coloratum. Spikelets can be found and are composed of a small first glume, a second glume, and a sterile lemma of equal length (and pointed), and finally the floret. 
From Left to Right: 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum . Smooth and shiny florets. From Left to Right: 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum. Smooth and shiny florets.
Panicum coloratum
From Left to Right: 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum. Smooth and shiny florets.
Panicum miliaceum ssp. miliaceum. Florets with various colors. Panicum miliaceum ssp. miliaceum. Florets with various colors.
Panicum miliaceum subsp. miliaceum
Panicum miliaceum ssp. miliaceum. Florets with various colors.

Panicum milliaceium ssp. ruderale. Dark brown florets with yellow veins.  Panicum milliaceium ssp. ruderale. Dark brown florets with yellow veins. 
Panicum miliaceum subsp. ruderale
Panicum milliaceium ssp. ruderale. Dark brown florets with yellow veins. 
Panicum repens. Florets are narrower and lighter-colored, with the first glume truncate and loosely fitting.  Panicum repens. Florets are narrower and lighter-colored, with the first glume truncate and loosely fitting. 
Panicum repens
Panicum repens. Florets are narrower and lighter-colored, with the first glume truncate and loosely fitting. 
Panicum virgatum.  The spikelet consists of a short first glume, a second glume, and a first sterile lemma of equal length and pointed, and finally the floret.  Panicum virgatum. The spikelet consists of a short first glume, a second glume, and a first sterile lemma of equal length and pointed, and finally the floret. 
Panicum virgatum
Panicum virgatum. The spikelet consists of a short first glume, a second glume, and a first sterile lemma of equal length and pointed, and finally the floret. 
Left to Right. 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum . Smooth and shiny florets. Left to Right. 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum. Smooth and shiny florets.
Panicum virgatum
Left to Right. 1. Panicum capillare 2. Panicum coloratum 3. Panicum virgatum. Smooth and shiny florets.