Palisada papillosa

Laurencia papillosa (Forsskål) Greville

St. Joseph: 4, 67–417, attached to rocks in shallow water near high tide line. St. John: 8, 67–478, in similar situations. St. Andrew: 11, 67–557, drifted ashore; 12, R–207, R–208, common on the reef. St. Mark: 6, 67–442, attached near high tide line to rocks along the peninsula to Scotts Head.

This species is all but ubiquitous in exposed situations near high tide level on rocks, and when thus exposed to strong light its normal blackish-purple color does not develop, so that the plants appear bright greenish-yellow.