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Root cross-section of Penstemon venustus

Image of Venus penstemon

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Summary[edit] Description: English: Root cross-section (30 microns) of Penstemon venustus. Lignified tissue is stained reddish using Phloroglucinol/HCL. Black markers denote annual ring borders. Individual collected at the Wallowa Mts., Oregon, USA (2003). Date: 7 August 2011. Source: Own work. Author: G. von Arx.

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G. von Arx
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G. von Arx
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d871d19aaabcafe7b5d0882752ec3807