Question

Differentiate between Opposite decussate and opposite superposed?

Answer 1

Opposite: The opposite phyllotaxy is the one in which a pair of leaves arise at each node on opposite sides. It is of two types

1. Opposite superposed: All the pairs of leaves of a branch arise in the same plane so that only two vertical rows a leaves are formed, e.g., Jamun, Guava, etc.
2. Opposite decussate: A pair of leaves at one node stand: at right angle to the next upper or lower pair so that four vertical rows are formed on the stem, e.g. Calotropis, Zinnia, Tulsi, etc.