Lines of Division are the partitions that separate and outline the ordinaries. A field that is divided is described as ‘party’. These divisions often have the same name as the ordinary that shares their shape.
Different colors, directions, and shapes are all frequently found.
Common divisions are
Image courtesy Charles Boutell
Other distinctions in the division lines are
Angled
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Beveled
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Cloverleaf [Shamrock]
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Dancette
Dancette image courtesy Charles Boutell
Dovetailed
Dovetailed image courtesy Charles Boutell
Embattled
Embattled image courtesy Charles Boutell
Fir Tree
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Fir Twig
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Indented
Indented image courtesy Charles Boutell
Invected
Invected image courtesy Charles Boutell
Lozengy
To be completely covered in lozenges, which is a token of noble birth. The Moroccan coat of arms displays a rare curved, three color lozengy line.
Morocco arms with curved lozengy image courtesy Wikipedia
Nebuly
Nebuly image courtesy Charles Boutell
Nowy
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Raguly
Raguly image courtesy Charles Boutell
Spaded
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Tortilly
Raguly image courtesy Charles Boutell
Tressure, Single Flory
Single Tressure Flory image courtesy Charles Boutell
Tressure, Double Flory Counterflory
Double Tressure image courtesy Charles Boutell
Tressure, Single Flory Counterflory
Single Tressure Flory Counterflory image courtesy Charles Boutell
Urdy and Wavy
Wavy or Urdy image courtesy Charles Boutell
A wonderful example of a wavy line of division ~
wavy Nicolle du Gu-e-Romain Cadet Image courtesy Wikipedia