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  1. regular, very dense branching;
  1. branches lying on one plane;
  1. intergenicula dorsiventrally flattened (distal tips often palmate due to anastomosed lateral intergenicula):
  1. often corniculated (sometimes with articulated projections (horn-like)):
Corallina elongata
  1. irregular, more or less dense branching;
  1. branches lying on one or more planes;
  1. cylindrical intergenicula, more or less tapered, compressed near branching:
  1. never corniculated conceptacles:
Corallina officinalis
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