Rhacomitrium lawtonae, a new moss species from British Columbia and Washington Rhacomitrium lawtonae, a new moss species from British Columbia and Washingtonv. 73707–712Ireland, Robert Root. 1970. "Rhacomitrium lawtonae, a new moss species from British Columbia and Washington." Bryologist, 73 707–712.More...ID: 24836Type: articleKeywords: NH-Botany; NMNH