The arrangement of leaves on stems or its branches

Solution

Phyllotaxy refers to the arrangement of leaves on a stem or branch. It can be alternate, opposite, or whorled. Reticulate and parallel venation refer to leaf vein patterns, while placentation refers to ovule arrangement within the ovary. Information Booster:                

1. Alternate phyllotaxy: One leaf per node (e.g., sunflower).
2. Opposite phyllotaxy: Two leaves at the same node (e.g., guava).
3. Whorled phyllotaxy: More than two leaves at a node (e.g., Alstonia).