Plumaria plumosa (Hudson) O. Kuntze
Also known as Plumaria elegans (Bonnemaison) Schmitz
Description: Soft, tufted, flaccid, dull blackish or brownish-red fronds, monosiphonous, corticate below, ecorticate above, to 100 mm long. Fronds repeatedly pinnate, branching dichotomous or alternate, ramuli opposite. Ultimate ramuli close-set, blunt, recurved, longer on outer side than on inner (bottom picture).
Habitat: On shady vertical rock faces (above), lower intertidal, widely distributed, may be very abundant between closely set boulders on southern and western shores.