Vindication of Physcomitrium pygmaeum (Funariaceae), an elusive and endangered moss from North America’s Great Basin

Matthew Johnson, Rafael Medina, Nikisha Patel, Genevieve Tocci, David Toren & Bernard Goffinet
Physcomitrium pygmaeum is an ephemeral moss described in 1871 from a single collection from Utah, currently considered conspecific with Physcomitrium pyriforme. The interpretation of the taxon has been problematic due to its rarity in the field, the elusiveness of the type material, and an extremely scattered and inconsistent collection record. Here we present a comprehensive description and assessment of the taxon following the identification of the original material and lectotype designation, the examination of all...
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