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Equisetaceae : Equisetum arvense det. Robbin Moran 2005 LINK TO THIS IMAGE

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2005.

Helical thickenings in the sporangium wall are a synapomorphy for the Equisetaceae. From a longitudinal section through the sporophyll. Copyright © 2005 by Robbin Moran (contact: kcn2[at]cornell.edu) [ref. DOL16699]

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