Fig. 5

Polysiphonia morrowii. Reproductive morphology of carposporophytes. a Aspect of a mature thallus; b aspect of an immature thallus; c progressive stages of maturation of cystocarps from 1 to 3; d detail of a trichogyne protruding from an immature cystocarp (arrowhead); e detail of a cystocarp surmounted by a forked hair (arrowhead); f mature cystocarps; g urceolate shape of a mature cystocarp; h surface view of a mature cystocarp; i detail of the narrow neck and wide ostiole of a mature cystocarp; j shape of released carpospores. Scale bars a = 1 mm; b = 250 μm; c, f, g, i and j = 100 μm; d and e = 50 μm; h = 200 μm