1997 Volume 82 Pages 19-25
The Japanese race of Hypnum callichroum is newly described as subsp. japonicum, which is differentiated from the subsp. callichroum by the smaller-sized plants usually showing more close branching and foliation, and the somewhat shorter lamina cells and setae. It is also distinct in the high fertility and a substratum preference for decayed wood and tree-trunks. An appendix is given to include a preliminary list of the species belonging to Hypnum sect. Hamulosa and their distribution.