Question

The ratio of old to young flowers in Euphorbia inflorescence is

• A. 1:1
• B. 1: many
• C. 1:2
• D. 10:1

Answer 1

The correct option is B 1: many

The ratio of old to young flowers in Euphorbia inflorescence is 1: many. The old flower is the single female flower and the young ones are male flowers, it is cyathium inflorescence.
Cyanthium and cymose are the same. Each cyathium or cymose is actually a flower cluster or inflorescence containing unisexual, apetalous male and female flowers. The inconspicuous male flowers occur in clusters and are reduced to a single red stamen, while the female flower consists of a single ovary (pistil) on a stalk (pedicel).
Therefore, the correct option is B.