Root cross-section of Penstemon venustus

Image of Venus penstemon

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Summary[edit] DescriptionAPI 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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