Hawai'i Coral Reef Network

Marine Plants of Hawai'i

Order Corallinales

Jania adherens
Description: calcified brittle branches pink to white color
Size: less then 0.5mm and 0.3-2cm long.
Habitat: close examination of almost any habitat will reveal the presence of this seaweed

Porolithon garderni  
Description: forms pinkish calcareous crusts or much branched hemispherical shaped heads
Size: 10-30cm across (or larger).
Habitat: on reef crest and just seaward of crest.
Photograph: Puhi Bay, Hilo Hawai'i. 1996

Porolthon onkodes
Description: forms extensive pinkish to purplish chalky crusts in intertidal areas exposed to surf action. Due to strong tolerance to sunlight and desiccation and its crustose nature it is extremely successful in occupying high wave energy habitats. P. onkodes performs a critical role in the formation and maintenance of the biotic reefs of Hawaii by providing an actively growing reef rim, allowing consolidation and cementation of reef material to occur in protected shoreward areas or the Porolithon ridge.
Habitat: intertidal areas exposed to surf.


Last update: 1/25/2005