In "The Purple Smurfs," tube-roses are depicted with blue flowers. Actually, they are naturally white as correctly depicted in the original comic story.
In "Haunted Smurf," when Papa Smurf is telling the other Smurf that they must leave the village, his pants are white instead of red in the medium close up shots of him.
In "The Purple Smurfs," Papa Smurf used pollen from tube-roses to cure the infected Smurfs. However, tube-roses were unknown in Europe until they were imported from the Americas in the 16th-17th century. The background of the Smurf cartoon series is the late Middle Ages (circa 14th-15th century), early for the understanding of tube-roses in Europe.