The number of carpels in both the Brassicaceae and Umbelliferae families is 2. Brassicaceae family
The morphological characteristics of cruciferous plants are mainly manifested as herbaceous plants, whose flowers usually have four petals arranged in a cross shape, which is also the origin of the name cruciferous. In terms of flower structure, cruciferous plants have a carpel number of 2, forming a complex pistil with a lower ovary. This feature is consistent in various plants of the Brassicaceae family. Umbelliferae family
Umbelliferae plants are also mostly herbaceous plants and often contain volatile oils with a special odor. Their stems are often hollow, with leaves that alternate and are often compound or lobed. In terms of flower structure, the inflorescence of Umbelliferae plants is usually umbrella shaped or compound umbrella shaped, with bisexual flowers and multiple radiating symmetries. Importantly, the number of carpels in Umbelliferae plants is also 2, and the carpels often coalesce to form a lower ovary.
Both the Brassicaceae and Umbelliferae families exhibit similar characteristics in flower structure, particularly in terms of carpel number, which is 2. This feature helps us better understand and distinguish plants from these two families.