Safflower (红花): a dawn harvest in Xinjiang

The material and its source

Safflower comes from Carthamus tinctorius L., in the Asteraceae family. The medicinal material is the dried flower.

Safflower is an annual thistle-like crop adapted to sunny, relatively dry fields. Its spiny leaves protect flower heads that gradually change from yellow to orange-red.

Harvest

Pickers enter the fields around dawn during the short peak flowering period. The soft florets are pulled by hand while leaving the developing seed head and much of the plant intact.

Processing

Fresh florets are spread thinly and dried promptly so they do not heat, clump, or darken. The finished material should remain visibly red-orange and free of excessive stems and debris.

Traditional uses and symptom patterns

Hong Hua is traditionally used in formulas for menstrual pain, absent periods, traumatic pain, and other blood-stasis patterns. It is not the same material as saffron, despite confusing English translations.

What modern research has examined

Hydroxysafflor yellow A and safflower-derived injections have been studied in cardiovascular contexts, but these are not equivalent to dried Carthami Flos taken by mouth. Reliable clinical evidence for the dried flower alone remains inadequate.

Safety and interactions

Avoidance during pregnancy is a traditional contraindication rather than a quantified modern risk estimate. Because Hong Hua is used in blood-stasis formulas and human interaction evidence is limited, people using anticoagulant or antiplatelet medicines or preparing for surgery should not self-prescribe it.