When a plant's leaves are whorled, it means that three or more leaves are arranged in a circle around a single point on the stem. This is in contrast to alternate leaf arrangements, where leaves grow one at a time at different points on the stem, and opposite arrangements, where leaves grow in pairs at the same point on the stem.

Here are some key points about whorled leaves:

* Number of leaves: Whorled leaves are characterized by having three or more leaves per node (the point on the stem where the leaves attach).

* Arrangement: The leaves are symmetrically arranged around the node, forming a circle or a spiral.

* Spacing: The leaves in a whorl are typically equidistant from each other.

Examples of plants with whorled leaves:

* Horsetail (Equisetum): Horsetails have whorls of small, scale-like leaves.

* Madder (Rubia tinctorum): Madder plants have whorls of four to six leaves.

* Bedstraw (Galium spp.): Many bedstraw species have whorls of four to eight leaves.

Benefits of whorled leaf arrangement:

* Increased light capture: Whorled leaves can increase the surface area exposed to sunlight, which can improve photosynthesis.

* Efficient water use: Whorled leaves can reduce water loss through transpiration by creating a microclimate around the stem.

* Structural support: The arrangement of whorled leaves can help provide structural support for the plant.

Overall, whorled leaf arrangements are a unique and efficient way for plants to maximize their resource utilization and survival.