We get a glimpse' of their duties from the Ordines Romani.
Work on the lines suggested by the Linnaean fragmenta was continued in France by Bernard de Jussieu and his nephew, Antoine Laurent, and the arrangement suggested by the latter in his Genera Plantarum secundum Ordines Naturales disposita (1789) is the first which can claim to be a natural system.
For the Ordines Romani; Muratori, Liturgia Romana Vetus; Cabrol, Dictionnaire d'archeologie chretienne et de liturgie, vol.
While there is frequent mention of the acolyte's office in the Ordines Romani, it is only in the Ordo VIII.
Agardh, Species, genera et ordines Algarum (vols.