A Grammatical Dictionary of Botanical Latin

praeprimis (adv.): most chiefly, most especially, most particularly, in the foremost way or place;

- (moss) In truncis arbor. sylvat., praeprimis quercuum et castanearum (Mueller), on the trunks of forest trees (arborum sylvaticorum), most especially of oaks and chestnuts.

- Visci albi praeprimis folia, dum colorem suum languescentia magis magisque in luteum mutant (S&A), most especially the leaves of Viscum album [i.e. Mistletoe), while withering, change their own color more and more into yellow.

- in terra argillosa praeprimis novalium Sardiniae, Siciliae, agri Neapolitani et Romani (C. Mueller), in clayey soil primarily of the fallow fields of Sandinia, Sicily, of the Naples region and Rome.

- [fungus] frequens haec incolit Juncos, praeprimis J. campestrem et [J.] pilosum L.(S&A), this often settles on [species of] Juncus, most especially J. campestris and J. pilosum.