A static radial tree diagram visualizes the hierarchy of plant species from a hardcoded dataset. Three root categories—Grasses, Trees, and Flowers—branch into leaf nodes like "Switch Grass" and "Rose." The visualization uses the D3.js library, specifically the `d3.tree()` layout with `d3.hierarchy()`, to position linked nodes. Rendered as SVG, node circles are encoded with varying sizes via `d.data.value`, while color properties from the data are applied to circle strokes and fills, and path links use curve interpolation for smooth connections.