Ptilium crista-castrensis, the knights plume moss[1] or ostrich-plume feathermoss,[2] is a moss species within the family Pylaisiaceae,[3][4] in the class Bryopsida, subclass Bryidae and order Hypnales.
This species occurs on the floor of Canadian boreal forests as well as many forests of northern Europe; an example of this occurrence is within the black spruce/feathermoss climax forest, often having moderately dense canopy and featuring a forest floor of feathermosses including Hylocomium splendens, Pleurozium schreberi and Ptilium crista-castrensis.[5]
Ptilium crista-castrensis, the knights plume moss or ostrich-plume feathermoss, is a moss species within the family Pylaisiaceae, in the class Bryopsida, subclass Bryidae and order Hypnales.