Stem - Internal Anatomy
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Section by Karen M. Owens; late-season stem (inflorescence
axis) with some secondary growth.
Section by Karen M. Owens; note chlorenchyma in cortex
(red, middle left).
Section by Karen M. Owens. Primary xylem (bottom) and
secondary xylem (top); frequent tannin deposits in vessels may
reflect early stages of senescence in the specimen which was a
late-season collection.
