Round-leaved Bryum (Bryum cyclophyllum)
Key Details
| Taxonomic Groups: | Non-vascular plant (incl. chromists) > moss > Moss |
| Red List Status: | Critically Endangered (Not Relevant) [CR(nr)] |
| D5 Status: | Included in the baseline Red List Index for England (Wilkins, Wilson & Brown, 2022) |
| Section 41 Status: | (not listed) |
| Taxa Included Synonym: | Ptychostomum cyclophyllum |
| UKSI Recommended Name: | Bryum cyclophyllum |
| UKSI Recommended Authority: | (Schwaegr.) Bruch & Schimp. |
| UKSI Recommended Qualifier: | (none specified) |
| Red List Citation: | Callaghan, 2023 |
| Notes on taxonomy/listing: | (none) |
Criteria
| Question 1: | Does species need conservation or recovery in England? |
| Response: | Yes |
| Justification: | Extinct in England. A boreal-montane species that may not survive possible reintroduction due to climate warming, though a species-specific climate change risk assessment has not been undertaken. |
| Question 2: | Does recovery/ conservation depend on species-specific actions? |
| Response: | Yes |
| Justification: | Possible reintroduction if results of a climate-change risk assessment are favourable. |
| Question 3: | At a landscape scale, would the species benefit from untargeted habitat management to increase habitat mosaics, structural diversity, or particular successional stages? |
| Response: | No |
| Justification: | Extinct in England |
Species Assessment
| Current step on the Species Recovery Curve (SRC): | 4. Autecology and pressures understood |
| Recovery potential/expectation: | Unknown |
| National Monitoring Resource: | Opportunistic - insufficient |
| Species Comments: | GB RL criteria: B1ab(iii), B2ab(iii). Boreal-montane Circumpolar species. |
Key Actions
Key Action 1
Proposed Action: Undertake species distribution modelling to understand the vulnerability of the species to projected climate change over the next 50 years and whether reintroduction should be trialled.
Action targets: 4. Autecology and pressures understood
Action type: Scientific research
Duration: 1 year
Scale of Implementation: National
High priority sites:
Comments: If reintroduction is to be trialled, we first need to have some evidence that the climate space of this Boreal-montane species is likely to survive in England within the next 50 years or so.
Acknowledgment:
Data used on this website are adapted from Threatened species recovery actions 2025 baseline (JP065): Technical report and spreadsheet user guide (Natural England, 2025). Available here.