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Crabgrass is one of the most-feared weeds out there, but have you ever seen its doppelgangers? Follow our tips to identify ...

This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...

Letter Published: 12 February 1927 The Chromosome Number in Dactylis Glomerata (Cocksfoot) J. GRIFFITHS DAVIES Nature 119, 236–237 (1927) Cite this article ...