Ochyra R. 1, Bednarek-Ochyra H. 1 2015. The earliest recognition of Schistidium occidentale (Grimmiaceae, Bryophyta), with a review of species of Schistidium subg. Canalicularia // Arctoa. Vol. 24: 32–36 [in English].

1Laboratory of Bryology, Institute of Botany, Polish Academy of Sciences, ul. Lubicz 46, 31–512 Kraków, Poland; e-mail: r.ochyra@botany.pl

KEYWORDS: Bryophyta, key to determination, nomenclature, North America, rheophyte, Schistidium, taxonomy

Abstract. Schistidium occidentale (E. Lawton) S.P. Churchill, a species described in 1967 as Grimmia occidentalis E. Lawton, was distinguished as a separate taxon in 1940. It was described as G. alpicola Hedw. var. rivularis (Brid.) Wahlenb. fo. acutifolia Grout. The identity of this taxon with S. occidentale is confirmed, its name is lectotypified, and some diagnostic characters of this form are illustrated. Species of Schistidium Bruch & Schimp. subg. Canalicularia Ochyra are reviewed and a key to their determination is provided.

doi: 10.15298/arctoa.24.06

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