The red flowers with thorns are good.

1. Thorny safflowers have sharp thorns, which can protect the safflower itself, while thornless safflowers do not have these thorns and have a smoother appearance, so thorny safflowers are better.

2. Thorny safflower is used for decoration and embellishment, which can add special visual effects, while thornless safflower is more used in fields such as dyes and herbal medicines. The visual effect is not good, so it has thorns. Red flowers are good.