Halophila capricorni (Hydrocharitaceae): a new species of seagrass from the Coral Sea

Abstract

A new seagrass species, Halophila capricorni Larkum, is described in the section Halophila. This species differs from Halophila decipiens Ostenfeld in (i) its generally larger size, (ii) the pattern of large hairs on the proximal region of the abaxial leaf surface, (iii) the presence of male and female flowers in separate axils of the same plant, (iv) styles 15–25 mm long, and (v) dispersal by floating fruits. Halophila capricorni is found on sand in deep water in coral environments on the Great Barrier Reef and in New Caledonia. It may also be present in the Philippines and adjoining regions.