Abstract
Bestia is divided into two components, the lectotype species, B. longipes, going to the Brachytheciaceae and the other, B. vancouveriensis, to the Thamnobryaceae under a new combi- nation as Porotrichum. Tripterocladium is positioned in the Hypnaceae and Isothecium in the Brachytheciaceae. Bestia, Tripterocladium, and Isothecium, from their inception have had a history of confusion one with another. They have now been purged of extra- neous elements, except in the case of Bestia, so that the genera have gained in definition and meaning. However, the familial linkages need some elucida- tion.
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