A Grammatical Dictionary of Botanical Latin

ill. or Ill. (abbrev.): illustris,-e (adj.B), q.v., “celebrated” (Stearn); superl. illustrissimus,-a,-um (adj.A), most celebrated (usu. of people);

- copiose nascentem inveniebat Clusius vicinis Nemethwywar Ill. Balthasaris de Batthyan arci caeduarum sylvarum declivibus (Ray), Clusius found it growing abundantly at Nemethwywar in declivities of the forests ‘fit for cutting’ [i.e. underwood, coppice wood] near to the castle of the celebrated Balthasar Batthyany.

NOTE: the abbreviation –mi (masc. gen.sg.) may represent the superlative of an adjective: -issimus,-a,-um (adj.A): illustrissimi = ill. mi (masc. gen.sg.), most celebrated [man];

- per manus ill. mi ac ex. mi Aloysii de Vasconcellos & Souza, by the hand of the most illustrious [illustrissimi] and most distinguished [eximissimi] Aloysius de Vasconcelos et Sousa.