MORPHOLOGY, PHENOLOGY AND CULTURE OF ANALIPUS-GUNJII (RALFSIALES, PHAEOPHYCEAE)

Taxonomic features of the brown alga Analipus gunjii (Yendo) Kogame et Yoshida are reported on the basis of material from northern Japan. Th is species is clearly distinguished from other species of the genus An alipus by its discoid basal systems. Plants are dioecious, and gametes are weakly anisogamous. This species is perennial, showing an apparen t seasonality at Oshoro, Hokkaido. Erect axes arise from basal systems in October and persist until March, and only discoid basal systems ar e present from April to September. In culture, basal systems became di scoid under all culture conditions examined (5-20 degrees C in short a nd long days). More abundant production of erect axes occurred under s hort-day culture conditions than long-day ones.