Which statement is incorrect?

The correct answer is Syngenesious stamens occur in the family Malvaceae.

Concept:

• Syngenesious stamens refer to stamens that are united by their anthers, while the filaments remain free. This characteristic is commonly observed in the family Asteraceae, not Malvaceae.
• The family Malvaceae features stamens that are typically monadelphous, meaning the filaments are united into a tube surrounding the style.

Explanation:

• Syngenesious stamens: These are a defining feature of the Asteraceae family, where the anthers are fused together forming a tube around the style. This helps in the efficient transfer of pollen.
• Malvaceae family: In this family, the stamens are usually monadelphous, where the filaments are fused into a single tube but the anthers are free. This structure is different from the syngenesious condition.

Other Options:

• Gynobasic style occurs in the family Lamiaceae: This is correct. In the Lamiaceae family, the style arises from the base of the ovary, a characteristic feature known as a gynobasic style.
• Caryopsis is the characteristic fruit of Poaceae: This is correct. A caryopsis is a type of simple dry fruit where the seed coat is fused with the fruit wall, and it is characteristic of the Poaceae (grass) family.
• Verticillaster is the characteristic inflorescence of Lamiaceae: This is correct. A verticillaster is a type of inflorescence that is typical of the Lamiaceae family, where flowers are arranged in a pseudo-whorl around the stem.