Notes on Inflorescence

Introduction to Inflorescence

• Flowers come in various shapes and types.
• Unique arrangements of flower clusters are called inflorescence.

Definition of Inflorescence

• Inflorescence refers to a cluster of flowers on a stem.
• They can be likened to the structure of pinnately compound leaves for better understanding, but they are not directly comparable.

Structure of Inflorescence

• Flowers can be arranged:
  • Along the stem
  • At the apex
• Both arrangements can be classified as inflorescence.

Types of Inflorescence

1. Racemos Inflorescence

   • Flowers arranged laterally along a central axis.
   • The apex (terminal point) does not bear a flower, allowing indefinite growth.
   • Older flowers are located near the base, while newer flowers develop towards the apex.
   • Known as indefinite inflorescence due to continuous growth.

2. Sciamos Inflorescence

   • Opposite of racemos.
   • Flowers develop at the apex, stopping indefinite growth of the shoot.
   • Older flowers occupy the apex; newer flowers grow from the secondary branches formed.
   • This arrangement has older flowers at the apex and newer flowers at the base.
   • Known as definite inflorescence.

Summary

• Inflorescence can be categorized into racemos (indefinite) and sciamos (definite).
• Understanding these patterns aids in the study of plant structures and behaviors.