Marie Anne Libert
Marie Anne Libert (* 1782 in Malmedy, † 1865) was a Belgian mycologist. Your official botanical author abbreviation is " Lib ".
After her iris genus Libertia is named.
She described the first several plant pathogenic ascomycetes, including Alternaria cheiranthi (Lib. ) PC Bolle (as Helminthosporium cheiranthi ) and Fusarium coeruleum Lib ex Sacc.