c.fr.
A collection by W. Bell ex Mt. Earnslaw, Otago, which both closely matches Brotherus' (1924, p. 334) key characters for C. decussata and which was determined by him as this species) is a relatively delicate and compact plant. It has stem leaves (c. 1.2 x 0.6 mm), mid laminal cells (mostly 15-24 µm) and costae (c. 45-60 µm wide) in the lower range of continuous variation for C. relaxa. In this and other specimens which fit Brotherus' concept of C. decussata the alar cells are quite compact (± subquadrate) and the leaf margins nearly entire.
Allan Fife, October 2006