I am looking for information on Luzula purpureosplendens, and all I can find is very general information on the genus Luzula.
Luzula purpureosplendens is endemic to Azores islands, which may be why there is so little information about the species. Another reason it may be hard to find information is that it has synonymous names, according to en.hortipedia.com, and these are Luzula azorica and Luzula purpurea. If you search either of the synonyms on the web, you will get some results, many quite technical (chromosomal studies).