Ptychostomum warneum

Ptychostomum warneum, known as sea bryum^[2] or Warne's threadmoss,^[2][1] is a protected moss found in sandy coastal areas in temperate regions of Europe (including Iceland) and is also recorded to have been found in the Himalaya, the Altai Mountains and in Quebec, Canada.

Ptychostomum warneum
Scientific classification
Kingdom:	Plantae
Division:	Bryophyta
Class:	Bryopsida
Subclass:	Bryidae
Order:	Bryales
Family:	Bryaceae
Genus:	Ptychostomum
Subgenus:	Ptychostomum subg. Ptychostomum
Species:	P. warneum
Binomial name
Ptychostomum warneum (Schwägr. ex Steud.) J.R. Spence
Synonyms[1]
Bryum mamillatum Lind. Bryum oelandicum H. Philib. Bryum warneum (Röhl.) Brid.

It is a pioneer species intolerant of both shade and trampling.^[3]

Generally forming dense clusters of plants with one-centimetre stems with small, hanging capsules in which spores are produced and, upon maturity, emitted.