For an Campeiostachysthat can also be viewed as a bracketed or indented key, go to a href="http://keybase.rbg.vic.gov.au/keys/show/7018">KeyBase. It is an edited version of the key in Baum et al. 2011. A taxonomic synopsis of Campeiostachys Drobov. Journal of Systematics and Evolution 49(2): 146 - 159.
Baum et al. (2011) treated Campeiostachys kamoji as distinct from Campeiostachys tsukushiensis, grouping the former with species that have 1 spikelet per node and the later with species having 2-4 spikelets at least at the central nodes.