St Patrick's Day

Ancestry.com states that I have Irish forefathers so I thought a sprig of clover was appropriate for today.  I'm not sure what the difference between a clover and a shamrock is! It is very windy outside so I brought it inside to blip!  The first link between St Patrick and the shamrock appears in 1675 on the St Patrick's or Halpennies.  The extra is the same shot 'Sculptured' in PaintShop2019 'Effects'.