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Azalea vs. Rhododendron: The Stamen Difference

Both belong to genus Rhododendron, but a simple floral trait distinguishes them most of the time:

Azaleas: 5 stamens per flower
Rhododendrons: 10 stamens per flower

Stamens are the male parts topped with pollen-bearing anthers. Other differences include leaf scales and hair structure, but stamen count is the quickest field ID.

Landscaping: Controlling Scale Insects on Rhododendrons and Azaleas; Planting Knockout Roses Near Azaleas: Soil and Sun Compatibility; Azalea and Lilac Choices for Nashua Region; Watering Azaleas and Rhododendrons: Tap Water vs. Rain Water; Azalea and Rhododendron Diseases: Identification and Control; Rhododendron & Azalea: Acid-Loving Shrubs for Four-Season Structure; Rhododendrons and Azaleas: Planting, Growing, and Care Guide; Azalea Varieties and Care: The Royalty of the Garden; Rhododendrons and Azaleas: Exacting Shrubs for Acid Soil and Light Shade; Azalea and Rhododendron Root Rot (Phytophthora): Prevention and Resistant Varieties

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