1) Fungus genus 2) Genus rosellinia 
Rosellinia is a genus of fungi in the Xylariaceae family consisting of over 90 species. Several of the species in this genus are plant pathogens. This is a complete listing of all currently accepted species in Rosellinia, based on the 2005 study by Petrini and Petrini. R. abscondita — R. aquila — R. arcuata — R. asperata — R. beccariana 
[n] - fungi having smooth perithecia with dark one-celled ascospores
genus Rosellinia noun fungi having smooth perithecia with dark one-celled ascospores