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Which Asteraceae tribe is known for ligulate flower heads?
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Asterales
True, or English, daisy (Bellis perennis).
The Asteraceae tribe known for having ligulate flower heads is Lactuceae (also referred to as Cichorieae).1
In this tribe, the flower heads consist entirely of ligulate flowers, which are perfect (bisexual) and feature a corolla that is tubular at the base and extends into a flat, strap-shaped ligule with five terminal teeth. A common example of a plant with these ligulate heads is the dandelion. While other types of flower heads—such as discoid, radiate, and disciform—are found across various tribes within the Asteraceae family, the ligulate head is almost exclusively restricted to the members of the Lactuceae tribe.1