Rose

1. The rose is normally borne singly with five petals, less usually doubly with an inner ring of five more petals. It is always represented full-blown, with the petals or flower-leaves expanded, seeded in the middle and backed by five green barbs or involucra,

rose barbed and seeded proper

The rose is never drawn with a stalk unless specifically expressed in the blazon. It is never emblazoned proper. This is because it is sometimes argent (the  white rose of York) and sometimes gules (the red rose of Lancaster). It may however be blazoned barbed and seeded proper, in which case the barbs are coloured green and the seeds yellow.

See also Rose-en-soleil
 

Rose-leaf.

2. The Mark of Cadency differentiating the seventh son.