Tartan is a cloth and does have specific roots in Scotaland. To be quite honest you may as well asked why isn't there a haggis, claymore, scottish dancers etc etc - or a baguette/onion on the French flag - or a fraknkfurter on the German or Pyramid on the Egyptian etc etc
The national flag of Scotland represents Saint Andrew and is known as the St.Andrew's Cross or the saltire.
The Saltire is the national flag of Scotland it is also known as The Saint Andrew's Cross.
The Welsh National tartan was designed by D. M. Richards in 1967 to demonstrate Wale's connection with the greater Celtic world. Its colours (green, red, and white) are the colours of the Welsh national flag.
Tenerife
It has two names. Saltire and St Andrew's Cross.
Because their regional flag is the Cross of St Andrew. Tartan is a form of cloth weaving suitable for woollen clothing, not necessarilly suitable for flags, and in any case, tartan would not be distinctive enough at a distance for a flag. On top of that, there is the issue of which tartan, since each pattern is clan- related.
The Saint Andrew's Cross or more commonly, The Saltire is the national flag of scotland. It has a white cross and a blue background. There is a second flag which is associated with Scotland, the "Rampant Lion", or Royal Flag of Scotland. It has a yellow background with a red lion on front.
Scotland's flag is the saltire or St.Andrew's cross which is a white saltire against a blue background. People in Scotland can also fly the Union flag. The lion rampant is often used as a national flag but strictly speaking it is the Scottish Royal Standard.
The saltire is the national flag of Scotland. It is one of the oldest flag in Europe. It came from one of the Apostles who was crustified using a cross shaped like the flag.
There are a number of symbols that one can associate with Scotland - the thistle, the lion rampant and the St Andrews Cross Flag (or Saltire) to name a few. The main symbol is probably the Thistle as it has been an important Scottish Symbol for over 500 years. Legend says that a group of Scots were woken when a viking raider stood on a thistle prior to an attack, however, there is little evidence if any to support this.
The St Andrews Cross (otherwise known as the Saltire), like any other national flag can be flown at any time but specially on official occasions.
The Saint Andrew's Cross, also known as the Saltire, is the national flag of Scotland. It represents the martyrdom of Saint Andrew, who was crucified on an X-shaped cross, which became a symbol of Scotland. The flag is a significant symbol of Scottish identity and heritage.