Hypnum andoi can be recognized as a species in the Netherlands. The differences with Hypnum cupressiforme are discussed. Generally, the two species are easily recognized in the field. We propose to use the average maximum cell length rather than mean cell length for distinguishing the species microscopically. Hypnum andoi is a rather common species in sheltered places in old oak and beech forest on sandy soils and occurs only on tree trunks and dead wood. Mixed colonies of the two species are common, especially in the central part of the Netherlands (Veluwe area).
