New species records of the Bryaceae for North America from the Aleutian Islands

抄録

  Four species of the Bryaceae are reported as new to North America from the Aleutian Islands: Haplodontium himalayanum (Mitt.) X.R.Wang & J.C.Zhao, Plagiobryum hultenii (Ochi & Perss.) Hedd., Ptychostomum sibiricum (Lindb. & Arnell) J.R.Spence, and P. vermigerum (Arnell & C.E.O.Jensen) J.R.Spence. The status of the high Arctic Ptychostomum teres (Lindb.) J.R.Spence in North America is re-examined with a new record from the islands.