This is not a traditional playing card, but rather a botanical illustration card featuring "Rhododendron in Bloom." This card is likely part of a collection or book titled "Rhododendrons and Azaleas" by William Watson published in 1911. Watson, a recognized expert in botany and horticulture. The book it came with originally provides a comprehensive guide to growing and caring for rhododendrons and azaleas. This would be the perfect card for plant lovers, flower enthusiasts, botanists and gardeners.