Inflorescence Types

Inflorescence refers to the arrangement of flowers on a stem. There are various types of inflorescence, and they are classified based on the structure and arrangement of the flowers. The most common types of inflorescence are:

1. Raceme: It is a type of inflorescence in which the flowers are arranged along a single axis, with each flower having its stalk. The flowers are arranged in an open, elongated, and unbranched structure.

2. Spike: It is similar to the raceme, but the flowers are arranged closely together along a single axis without any stalks. The spike inflorescence is often narrow and elongated.

3. Umbel: In this type of inflorescence, the flowers are arranged in a flat or rounded structure, with all the flower stalks arising from a common point. The umbel inflorescence is often found in plants of the carrot family.

4. Corymb: It is a type of inflorescence in which the flowers are arranged in a flat-topped structure, with the lower flowers having longer stalks than the upper ones.

5. Catkin: It is a type of inflorescence in which the flowers are arranged in a pendulous, elongated structure. The catkin inflorescence is often found in trees such as willows and birches.

6. Hypanthodium: It is a type of inflorescence in which the flowers are arranged in a fleshy, cup-like structure, with the base of the flower stalks fused together.

7. Cyathium: It is a specialized type of inflorescence found in plants of the Euphorbia family. The flowers are arranged in a cup-shaped structure, with the male and female flowers enclosed within a single bract.

8. Verticillaster: It is a type of inflorescence found in plants of the mint family. The flowers are arranged in a whorled structure, with each whorl containing several flowers.

Same Type of Inflorescence

The question asks about the same type of inflorescence between catkin and hypanthodium, raceme and cyathium, corymb and umbel, and verticillaster and spike.

Among these options, the same type of inflorescence is corymb and umbel. Both corymb and umbel are flat-topped inflorescences, with the flowers arranged in a similar fashion. The only difference is that in the umbel inflorescence, all the flower stalks arise from a common point, while in the corymb inflorescence, the lower flowers have longer stalks than the upper ones.

Conclusion

Inflorescence refers to the arrangement of flowers on a stem, and there are various types of inflorescence. Among the options provided, corymb and umbel are the same type of inflorescence because they are both flat-topped inflorescences with the flowers arranged in a similar fashion.

Corymb and umbel has same inflorescence i.e. racemose inflorescence. rest of all belongs to diff. inflorescence.