Sphagnum-Field-Guide

S.warnstorfii has its pendant branches closely appressed to the stem whereas the ones of S. russowii will first reach out and then further downward along the stem also be appressed.

Sources: P. 3 https://bryology.org/wp-content/uploads/2018/08/Bryological-Times-2002-107.pdf

https://www.inaturalist.org/observations/178222140

https://www.inaturalist.org/observations/322289629

https://www.inaturalist.org/observations/310546695