Ptychominon aciculare (colloquially known as ‘Pipe-cleaner Moss’) is a species of moss found predominantly in Australia, New Zealand, New Caledonia, Samoa, Juan Fernandez Islands and Chile. It is easily recognised given its similarity, especially when partially dried, to a pipe-cleaner. This name is commonly accepted across Australia and New Zealand. It has been observed growing from between sea level to sub-alpine altitudes (1200m).

This plant may also be recognised as Hypnum cucullifolium or Ptychomnion gracillimum.

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