Description
Related Subjects
The graph displays the other subjects mentioned on the same pages as the subject "Rhododendron 'Madame L. van Houtte'". If the same subject occurs on a page with "Rhododendron 'Madame L. van Houtte'" more than once, it appears closer to "Rhododendron 'Madame L. van Houtte'" on the graph, and is colored in a darker shade. The closer a subject is to the center, the more "related" the subjects are.