Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Hudsonia' from the website Trees and Shrubs Online (treesandshrubsonline.
A genus of three species exclusively North American, and allied to Cistus and Helianthemum, which it resembles in the fleeting nature of its blossom. Its yellow flowers and three-valved seed-vessel distinguishes it from Cistus, and from both it differs markedly in the heath-like habit. Named in honour of William Hudson, an English botanist of the 18th century.