<em>Oreocereus celsianus</em> growing in the altiplano of northern Argentina
James D. Mauseth University of Texas Department of Integrative Biology Austin Texas 78712 USA email@example.com
Cactaceae, Cactus, Evolution, Vessel, Water Stress, Wood
BSA Plant Images Online -
Plants of Oreocereus celsianus growing in the altiplano of northern Argentina at an altitude of 4000 m. These cacti have dimorphic wood. While young and small they produce a soft spongy wood and the body is supported by turgor. When older, taller, and heavier they produce a fibrous wood strong wnough to support the body.
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