There is wide variation in size of the stem internodes, position of the hydrocladial apophyses, width of the nematothecal pedicels and length of the terminal spine. Those hydrothecae with more pronounced terminal spines are always larger and more robust in appearance than those with the shorter spines.
Hydrorhiza wide and flat with transverse dark markings. Stems to 3 mm long, internodes of variable length, 0.17-0.21 mm, width at node 0.02-0.04 mm. Hydrocladia arising near middle of short internodes, distally on long internodes. Hydrothecae 0.16-0.18 mm deep, abcauline wall strongly convex. Terminal hydrocladial spines well developed, varying from long and sharply pointed to blunt and barely protruding past hydrothecal margin.
South Pacific, including New Zealand and Australian waters.
Subtidal, growing on algae and hydroids.