Key to species of Sphacelaria

1 Arms of modified lateral branches (propagula) cylindrical, like a broad V S. rigidula
1 Arms of propagula not cylindrical, approximately triangular or club-like in outline 2
2 Propagula club-like, top rounded or thickened S. novaehollandiae
2 Propagula triangular, like a top; plant tufts dense and nearly black S. tribuloides

Back to  Common   Hawaiian   Brown   Algal  Genera