Image: Stemgroups Rev
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Description: The stem and crown group concept. Revised from the original to clarify that the stem group does NOT include the basal node (ancestor) of the crown group.
Title: Stemgroups Rev
Credit: Stemgroups.jpg
Author: Stemgroups.jpg: en:user:Grahbudd derivative work: Peter coxhead (talk)
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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