The Cactaceae
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The Cactaceae is a monograph on plants of the cactus family written by the American botanists Nathaniel Lord Britton and Joseph Nelson Rose and published in multiple volumes between 1919 and 1923. It
Nathaniel Lord Britton
Joseph Nelson Rose
Watercolor of several Opuntia cactus species by Mary Emily Eaton for Britton and Rose's The Cactaceae, 1919 (vol. 1, plate XXXIV)
Watercolor of three species of Cactaceae by Mary Emily Eaton for Britton and Rose's The Cactaceae, 1919 (vol. 1, plate III)