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Baltisphaeridium oligacanthum ssp. velatum
| oligacanthum ssp. velatum | |
| Wetzel, W. (1952) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| other | |
| oligacanthum ssp. velatum | |
| Wetzel, W. (1952) | |
| Downie, C. and Sarjeant, W.A.S. (1965) | |
| other | |