Assertion: american elm | /r/HasAspect | 56 chromosomes
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text: Unfortunately, conflicting sources have created much confusion about the nature of these two varieties; for example, a scientific report from 1994 had claimed based on microscopic examinations that the Jefferson elm is a triploid clone with 42 chromosomes, in contrast to typical American elms, which usually are tetraploid and have 56 chromosomes.