http://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:64452-1

see also https://doi.org/10.2985/026.022.0106
Estrela Figueiredo, Gideon F. Smith "Furcraea selloana K.Koch is the Correct Orthography of the Species Name that Commemorates Hermann Sello in Furcraea Vent. (Asparagaceae subfam. Agavoideae / Agavaceae)," Haseltonia, 2016(22), 31-34, (1 December 2016)

I can also find no record of a named subspecies "marginata" - the cultivar F. s. 'Marginata' appears to have been incorrectly added to the iNaturalist database.