Image: Equisetum arvense fertile
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Description: Drawing of a fertile stem of Equisetum arvense, Order Equisetales, approximately 10 cm as drawn. At the top is the strobilus, that consists of the axis (inside) and 15-20 horizontal circles of about 20 sporangiophores. Lower down the stem, two sheaths of merged microphyls. The stem has lengthwise many strong ridges.
Title: Equisetum arvense fertile
Credit: Own work
Author: Dwergenpaartje
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC BY-SA 3.0
License Link: https://creativecommons.org/licenses/by-sa/3.0
Attribution Required?: Yes
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